174 posts

6 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

17:58
SETX is not recognized as an internal or external command operable program or batch file [duplicate] - anonymous Newest 'ffmpeg' Questions - Stack Overflow

(skip this paragraph if you don't care about context): So I was trying to record inside of Minecraft using the replay mod, and to render a video I have to install this thing called ffmpeg to render it, and my fears were correct, SETX is not recognized. So, a while back I had to redo my javac because that wasn't recognized, but when I did get that fixed, it made all my other commands toast, except the basic ones like "copy" or "del". I don't know how, I'd assume I'd need to manually input the path variable and everything because I doubt I could even find (...)
17:57
convert multi file in multi folder with ffmpeg - SaeiD Newest 'ffmpeg' Questions - Stack Overflow

i want to use ffmpeg for convert all file in multi folder for example i want to convert all audio on more then 170 folder with ffmpeg at once ..\\voice\\SP_WL6_kismet1_a_LOC_INT\\snd_vo_SP_WL_wav ..\\voice\\SP_WL6_kismet1_a_LOC_INT\\ed_vo_SP_WL_wav .... .... .... This folder also contains files in other formats on these folders i have more then 1000, ogg file i want to convert all of them to wav at (...)
17:52
ffmpeg make slideshow with images and videos - atticus Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to make a slideshow with ffmpeg that should contain videos and images. Since as far as I know, ffmpeg cannot do this in one step (which would be of course the preferable step) I'm breaking it up to make a slideshow of some images and concatenate the resulting video with another video. The problem with this is that when making a slideshow with ffmpeg (like described here: https://trac.ffmpeg.org/wiki/Slideshow) the framerate is adjusted to make it possible to view one image for a longer time. Now I've got multiple videos with different (...) -- https://trac.ffmpeg.org/wiki/Slideshow
17:48
How to merge two video using FFMPeg library on Android - i i Newest 'ffmpeg' Questions - Stack Overflow

How to merge two video using FFMPEG Library on Android studio? I want to get first video from url.
17:31
Combining an audio file with video file in python - Fahadkalis Newest 'ffmpeg' Questions - Stack Overflow

I am writing a program in Python on RaspberryPi(Raspbian), to combine / merge an audio file with video file. Format of Audio file is WAVE Format of VIdeo file is h264 Audio and video already recorded and created at same time successfully, I just need to merge them now. Can you please guide me on how do I do that?
17:03
Any other better ways to extract frames from a large size video according to the timecode given? - Yong En Newest 'ffmpeg' Questions - Stack Overflow

Given a video from youtube with at least 600 MB. The video is annotated with labels that happens in multiple timecodes. The timecodes are in millisecond (SSSS.ss). I am trying to get the frames that fall within a time period (2 timecodes). There are TWO approaches that I used with different tools, one is using openCV in python and FFmpeg in bash script: I would stick with few variables here, fps = 25 timecode (after convert into second) = 333.44 to 334.00 take note that I am dealing with time period that might less than a second. (...)
16:34
FFmpeg: How can I loop a single frame of video to cover the length of audio track - John Bergqvist Newest 'ffmpeg' Questions - Stack Overflow

I have a VOB file holding an MPEG-2 video track with an AC-3 audio track. The video track of that VOB file consists of a single frame, which when played in a DVD player, holds that still frame until the audio track has finished. How can I (with FFMPEG ideally), loop that frame to make a "normal" video track that lasts for the length of the audio track, rather than just a single frame? ffmpeg version N-91999-g148a21611d Copyright (c) 2000-2018 the FFmpeg developers built with gcc 8.2.1 (GCC) 20180813 configuration: --enable-gpl --enable-version3 --enable-sdl2 (...)
15:37
Creating narrated slideshow from multiple images and sound files - Tobi Newest 'ffmpeg' Questions - Stack Overflow

I have a set of slides in jpg format (s-00.jpg, s-01.jpg, ...) and a set of audio files in mp3 format (a-00.mp3, a-01.mp3, ...). I would like to create an mp4 with a narrated slideshow from this: s-00.jpg shows while a-00.mp3 play s-01.jpg shows while a-01.mp3 plays ... I'm sure this is relatively trivial with ffmpeg, but I struggle with the syntax. All I managed to find out so far is that I can make a video from the images with ffmpeg -i s-%02d.jpg slideshow.mp4 I found lots of examples how to add one mp3 file (...)
14:10
ffmpeg mp4 video cannot be played in old tv - Rick Brian Newest 'ffmpeg' Questions - Stack Overflow

I've convert many video to mp4 using ffmpeg and playing well on my TV. But ever since I change my laptop to a new one, my conversion failed to load on the TV. I have tried to download old-stable ffmpeg Windows build, I tried also download a win-32 build, no good. (I'm using x64 laptop with Windows 10 64-bit, just the same like previous laptop) I also tried to add -pix_fmt yuv420p, still no good. This is code that I used to convert using ffmpeg: ffmpeg -f concat -i "D:\\Convert\\LISTCAM.TXT" -c:v libx264 -c:a aac -pix_fmt yuv420p "Apr (...)
12:22
ffmpeg and nginx - restream with audio reencoding - khaled.priam Newest 'ffmpeg' Questions - Stack Overflow

I use nginx and ffmpeg to restream video from my provider. Previously I use ffmpeg with arguments where I reencoding video and reencoding audio, because my server is to slow I resigned from reencoding. So now, I use that command : ffmpeg -re -i http://link.somelink.com:6565/21d12d1/17233 -map 0 -c copy -bsf:a aac_adtstoasc -f flv -flvflags no_duration_filesize rtmp://test_ip/canal/stream This works only when my provider streaming with aac audio codec, but sometimes my provider change audio codec to ac3. And then this doesn't work. I try something (...)
10:41
clang++: error: linker command failed with exit code 1 (use -v to see invocation) in cpp with ffmpeg - Pradeep Simba Newest 'ffmpeg' Questions - Stack Overflow

clang++: error: linker command failed with exit code 1 (use -v to see invocation) I saw this link and link2. But, it not done. My jni folder: Android.mk file LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_C_INCLUDES += ./include LOCAL_MODULE := native-lib LOCAL_CFLAGS := -DSTDC_HEADERS -std=c99 LOCAL_CFLAGS := -Wno-pointer-sign LOCAL_ARM_MODE := arm APP_OPTIM := release LOCAL_SRC_FILES := \\ ./native-lib.cpp LOCAL_LDLIBS := -llog include (...) -- link2,
03:32
ffmpeg jpg images to video with the use of .bat file - Kickdak Newest 'ffmpeg' Questions - Stack Overflow

I am trying too create an .bat file which is converting all jpg with the use of ffmpeg images to a video file. But cant seem too make it work. Any ideas? Edit: I got it too work with this: ffmpeg -framerate 5 -i 2020_03_29_17_49.jpg video.avi But i cant seem to select all images of jpg. -- ,
02:41
Parsing MP4 H.264 frame bytes to Packet in GoAv (libav ffmpeg bindings in Go) - MikolajMGT Newest 'ffmpeg' Questions - Stack Overflow

I have a problem with processing MP4 (h.264) video with GoAv which is Go binding for avlib ffmpeg. I reading MP4 video from file, and retrieve Packets from it. Now for each packet I'm converting it to bytes by following code: data0 := packet.Data() buf := make([]byte, packet.GetPacketSize()) start := uintptr(unsafe.Pointer(data0)) for i := 0; i Now I'm sending this bytes to client and I need again retrieve Packet using following methods func New(pxlFmt PixelFormat) (*H264Decoder, error) avcodec.AvcodecRegisterAll() codec := (...)
01:53
Output luma and chroma data in txt format - AL-KOON Newest 'ffmpeg' Questions - Stack Overflow

Good day! I would like to know if there's a way to get Y/luma values in txt format here it is the command line -https://ffmpeg.org/ffmpeg-filters.html#Examples-105 https://ffmpeg.org/ffmpeg-filters.html#signalstats-1 and one more thing I would like to know the way to get all YUV min/max values at once thanx regards. -- https://ffmpeg.org/ffmpeg-filters.html#Examples-105, https://ffmpeg.org/ffmpeg-filters.html#signalstats-1
00:25
Compress and get thumbnails from .mp4 files using .net c# - Umair Shahid Newest 'ffmpeg' Questions - Stack Overflow

I was searching how we can compress mp4 file and generate thumbnails from that file, Fortunately, I found one solution "MediaToolKit" that worked perfectly for thumbnail generation but not works for compression. Currently, what I am doing, I have generated .bat file which contains commands of FFmpeg for example ffmpeg -i %1 -an -crf 25 -vf fps=fps=30,scale=640x480 %output.mp4 But it's not good stuff, I want to write a program in C# which will take video and compress it and generate thumbnails Does anyone have an idea about (...)

5 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

23:11
How to optimize the FFMPEG h264/aac conversion while generating HLS segments too - Arjun Thakur Newest 'ffmpeg' Questions - Stack Overflow

I am generating HLS segments using FFMPEG. Here is the command that I am using : ffmpeg -i "rtmp://localhost/oflaDemo/33/hlsopt3 live=1" -y -c:v libx264 -b:v 1000k -vprofile baseline -preset medium -x264opts level=41 -threads 4 -s 480x360 -map 0:v -c:a libfaac -b:a 160000 -ac 1 -hls_time 3 -hls_list_size 3 -hls_wrap 10 -start_number 1 hlsopt3.m3u8 I am working on Ubuntu 12.04 and using RED5 1.0.2 as my streaming server and I want to stream videos on android and ios devices. But the playback on devices is very jerky, they do not play video smoothly. Also my (...)
23:09
How to get video dimensions using FFMPEG [duplicate] - GethuJohn Newest 'ffmpeg' Questions - Stack Overflow

My goal is to pass a Video file to FFMPEG and to get its dimension as output.How can I achieve this. Can anyone help me out with sample code?
23:02
Restreaming mpd to m3u8 loads CPU, any solution? - Marhul88 Newest 'ffmpeg' Questions - Stack Overflow

i restream channels from mpd to m3u8 but it loads cpu very much. Is any soliton to restream mpd streams easily? This is code: [program:channel] autorestart=true command=/usr/local/ffmpeg/bin/ffmpeg -re -hide_banner -headers 'Referer: https://example.com/' -i https://stream.webm.mpd -c:v libx264 -preset ultrafast -tune zerolatency -c:a aac -b:a 128k -f hls -hls_time 4 -hls_flags append_list+delete_segments -hls_list_size 6 -hls_segment_filename '/etc/nginx/hls/channel/file%%03d.ts' (...)
22:47
Is it possible to convert all video files in subdirectories on google drive using ffmpeg & rclone? - rms Newest 'ffmpeg' Questions - Stack Overflow

Currently I'm using this code whereby rclone fetches 1 file from my google drive, converts it using ffpmeg on a server and moves the converted files to the same folder. It's shown as below. Step 1 is generating a list over which rclone can iterate over and the conversion process begins with the second script in step 2 step 1 rclone lsf "gdrive:/folder" --files-only > list.txt step 2 while read file; do rclone copy "gdrive:/folder/""$file" . -P ffmpeg -i "$file" -vf scale=-1:540 -vcodec libx265 -crf 26 "$file%.*.mkv" (...)
22:45
OpenCV VideoWriter produces "can't find starting number" error - user3325139 Newest 'ffmpeg' Questions - Stack Overflow

I am trying to write 16-bit grayscale video using the FFV1 codec and opencv.ImageWriter on Windows 10 Here is my code: import numpy as np import cv2, pdb print(cv2.getBuildInformation()) def to8(img): return (img/256).astype('uint8') cap = cv2.VideoCapture(0+cv2.CAP_DSHOW) cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc('Y','1','6',' ')) cap.set(cv2.CAP_PROP_CONVERT_RGB, False) out = cv2.VideoWriter('out.avi', (...) -- https://pastebin.com/whtF6ixG
22:29
Detect same scenes in video file using ffmpeg - Bojan Vukasovic Newest 'ffmpeg' Questions - Stack Overflow

Is there any way to detect repeating video sequence in large video file? I wanted to crop video when it recognizes same sequence? e.g. big file contains (seq1-----------seq1---------seq1---------) and I need from this 3 files with (seq1-----------). Here seq1 is more-less same video sequence with duration of 10 seconds.
22:23
How I can create iptv server? - Randy Firfield Newest 'ffmpeg' Questions - Stack Overflow

I need create iptv TS server ex:) http://ukiptv.ddns.net:8000/live/content/23HjeuPQrf/1355.ts I have sample TS file. and the TS file is not long. I want to create http server with the file(TS) repeately. I can make new PCR. I tried with nodejs. also it seems working. But, the RAM usage is increase over the time. Below code is my code with node js. app.get('/test.ts', async (req, res) => var data = fs.readFileSync('./testDownload_1306_small_more_small.ts'); // var first_pcr = found(data); var (...) -- http://ukiptv.ddns.net:8000/live/content/23HjeuPQrf/1355.ts
20:30
How to concatenate two MP4 files using FFmpeg? - Mark L Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to concatenate two mp4 files using ffmpeg. I need this to be an automatic process hence why I chose ffmpeg. I'm converting the two files into .ts files and then concatenating them and then trying to encode that concated .ts file. The files are h264 and aac encoded and I'm hoping to keep the quality the same or as close to original as possible. ffmpeg -i part1.mp4 -vcodec copy -vbsf h264_mp4toannexb -acodec copy part1.ts ffmpeg -i part2.mp4 -vcodec copy -vbsf h264_mp4toannexb -acodec copy part2.ts cat part1.ts part2.ts > parts.ts ffmpeg -y -i (...)
20:03
How to let fluent-ffmpeg complete rendering before executing next line of code? - wongz Newest 'ffmpeg' Questions - Stack Overflow

The .forEach() loop cuts ffmpeg short so it doesn't fully finish rendering any single video. How can I allow ffmpeg to finish rendering before the next loop occurs? let videos = [vid1.mp4, vid2.mp4, vid3.mp4]; videos.forEach((vid, i) => ffmpeg(vid) .size('1280x720') .save(vid);
19:31
ffmpeg recursive conversion with explanation - MTH Newest 'ffmpeg' Questions - Stack Overflow

I am new to ffmpeg and am using it primarily to convert flac audio into aiff. I have looked at a few threads for recursive ffmpeg conversions but none explicitly explain what part of the command dictates recursion. My ideal outcome would be to create the batch script in a high level directory within my library and have it recurse through all subdir's converting '*.flac' to '%%-na.aiff'. Even better would be to create a copy of the directory the files are in appending "-AIFF" to the directory name and placing the converted files there. (...)
19:23
Getting video dimension / resolution / width x height from ffmpeg - David542 Newest 'ffmpeg' Questions - Stack Overflow

How would I get the height and width of a video from ffmpeg's information output. For example, with the following output: $ ffmpeg -i video.mp4 ... Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4': Metadata: major_brand : isom minor_version : 1 compatible_brands: isomavc1 creation_time : 2010-01-24 00:55:16 Duration: 00:00:35.08, start: 0.000000, bitrate: 354 kb/s Stream #0.0(und): Video: h264 (High), yuv420p, 640x360 [PAR 1:1 DAR 16:9], 597 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc Metadata: creation_time : (...)
17:00
Rearranging frame patterns with ffmpeg - endelways Newest 'ffmpeg' Questions - Stack Overflow

Suppose a constant frame rate video has some occurrences of this frame pattern (same number means identical (considered by mpdecimate, for example) frames): 1 1 1 1 1 2 3 4 5 How to transform all these occurrences to: 1 1 2 2 3 3 4 4 5? If it matters, video has duplicate frames only at the start of pattern occurrences and nowhere else.
16:25
Rearrange video frame patterns with ffmpeg - endelways Newest 'ffmpeg' Questions - Stack Overflow

Suppose a constant frame rate video has some ocurrences of this frame pattern (same number means identical (considered by mpdecimate, for example) frames): 1 1 1 1 1 2 3 4 5 How to transform all these occurences to: 1 1 2 2 3 3 4 4 5?
16:02
How can I extract bonus images from a tv show DVD using ffmpeg? - Hatem Newest 'ffmpeg' Questions - Stack Overflow

I'm using MakeMKVcon to automate episodes extraction. It do the job, expect the metadata. I have to rename files manually. But the problem here is that I want to extract some bonus pictures slideshow from the ISO but no software can detect it. I can only display those images using VLC (using the ISO file). Do you have any idea how to do that ? Here's the ffmpeg -i output: $ ffmpeg -i /path/to/iso/file.ISO ffmpeg version git-2020-03-24-7239254 Copyright (c) 2000-2020 the FFmpeg developers built with Apple clang version 11.0.0 (...) -- MakeMKVcon
14:42
Could not find codec parameters for stream 0 (Video: hevc, none): unspecified size - bzc0fq Newest 'ffmpeg' Questions - Stack Overflow

I try to use ffmpeg to feed ffserver on CENTOS 6.10. When I run ffmpeg on stream I got an error message: Could not find codec parameters for stream 0 (Video: h264, none): unspecified size. The full ffmpeg output is here: [rootⓐstone1 ~]# ffmpeg -i rtsp://user44:xxxⓐ192.168.101.108:554/0 -y http://192.168.101.1:8090/feed2.ffm ffmpeg version 2.6.8 Copyright (c) 2000-2016 the FFmpeg developers built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16) configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg (...) --
10:33
Run image top to bottom multiple photos - Monso Newest 'ffmpeg' Questions - Stack Overflow

I have many photos, and want to run from top to bottom EX: 1.jpg 2.jpg 3.jpg 4.jpg 5.jpg ...... I can not run many images, in the code below running from bottom to top, helps me fix code to run multiple images, running from top to bottom . Thank you for taking time for me MyCode: ffmpeg -y -f lavfi -i color=s=900x360:d=60:r=30 -i "a/%%1d.jpg" -i 2.mp3 -i logo.png -filter_complex "[1:v]scale=900:-1[fg]; [0:v][fg]overlay=y='min(-h+main_h+(h-main_h)*t/60, 0)':shortest=1[gg]; [gg][3:v]overlay=10:main_h-h-10[gh]" -shortest -map (...)
10:50
FFMPEG combining MP4 videos with same encoding not working, only showing first video - Ayudh Newest 'ffmpeg' Questions - Stack Overflow

My mp4 videos have the same encoding: h264 I know because I ran this command on them: ffprobe -v error -select_streams v:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 a.mp4 Now I combine them using the following command: ffmpeg -loglevel quiet -f concat -safe 0 -i video-list.txt -c copy video-final.mp4 my video-list.txt file looks like this: file 'a.mp4' file 'b.mp4' file 'c.mp4' Now the video-final.mp4 which is the combined video actually has (...)
06:43
Why does this ffmpeg,exe window keep opening when I run my command? - John Newest 'ffmpeg' Questions - Stack Overflow

I'm making a discord bot and for this aspect of the bot, I wanted it to play music in the voice channel. Here is my code for it: ⓐclient.command(pass_context=True) async def play(ctx, url: str): song_there = os.path.isfile("song.mp3") try: if song_there: os.remove("song.mp3") print("Removed old song file") except PermissionError: await ctx.send("`There's already a song playing, request your song after!`") return await ctx.send("`Getting your song ready...`") voice = get(client.voice_clients, (...) -- https://imgur.com/a/iRr0qwj
06:31
fluent-ffmpeg How to make video rendering synchronous with code? - wongz Newest 'ffmpeg' Questions - Stack Overflow

I want to make the code run only after ffmpeg has finished rendering the videos. Currently, the code runs faster than the videos can render. videos.forEach((vid, i) => ffmpeg(`$process.cwd()/video/tmp/$vid`) .outputOptions(['-r 30', '-filter:v scale=w=720:h=1280', '-crf 20']) .save(`$process.cwd()/video/tmp/$vid`) .on('end', ()=> console.log(`Video $i rendered`)); ); console.log("Fully Completed"); The console shows: Fully Completed Video 0 rendered Video 1 rendered (...)
06:17
Efficient and Perfect way to extract frames from a large size video using python or ffmpeg according the timecode given - Yong En Newest 'ffmpeg' Questions - Stack Overflow

let's say I have a video from youtube with at least 600 MB. The video is used for annotation where I have the annotated information in another text file. The annotation file has the timecode in millisecond (SSSS.ss). What I am trying to do is going into the timecode on the video and getting out the frames within the this period (TWO timecodes). There are TWO approaches that I used with different tools, one is using openCV in python and FFmpeg in bash script: I would stick with few variables here, fps = 25 timecode (after convert into second) = 333.44 to (...)
05:52
Stream voice from Android's micro to RTMP server using FFMPEG - user2258282 Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to mix audios from Android's microphone and a mp3 file in storage and stream to a RTMP server using FFMPEG Now, I could stream a single mp3 file to RTMP server by the below command ffmpeg -i -acodec libmp3lame -ab 128k -ac 2 -ar 44100 -f flv rtmp:// And, I could stream audio from Mac's microphone to RTMP server by the below command ffmpeg -f avfoundation -i ":0" -f flv rtmp:// But now I haven't found command to mix audios from Android's microphone and a mp3 file in storage and stream to a RTMP (...)
05:13
Generate video containing scrolling multiple image - Monso Newest 'ffmpeg' Questions - Stack Overflow

I want to generate a video [let's say 800x600] from a 800x10000,1600x900,1920x1080 still image. this is my picture enter image description here I have some 800x11000 photos how to let it scroll to an end and to another I have a lot of pictures example 1.jpg 2.jpg 3.jpg 4.jpg 5.jpg .... I want it to scroll all the way inside the image folder. My code does not work . Thanks for your time! My Code: ffmpeg -y -i "a/%%1d.jpg" -vf "scroll=vertical=-0.9997,crop=iw:600:0:0,format=yuv420p" (...) -- enter image description here
05:12
Retrieve h.264 frame as byte slice from MP4 file in Golang - MikolajMGT Newest 'ffmpeg' Questions - Stack Overflow

I'm looking for some library or tool to retrieve next frames from MP4 file in H.264 format in Golang as binary data (streaming server purposes). I was looking at GoCv and GoAv, but from what I know GoCv allows only save frames directly to file (not to bytes in memory), in GoAv I also havn't found any method to do it (or maybe I am missing something?) I would be grateful to point any library which allows to do that. Greetings
02:39
ffmpeg - whatsapp: video format not supported - Santhosh Yedidi Newest 'ffmpeg' Questions - Stack Overflow

I have two videos (.mp4) files. One uploads to whatsapp and another does not. Using ffmpeg I checked their properties: a) Properties of video which uploads: Duration: 00:00:56.45, start: 0.148000, bitrate: 1404 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1080x1080, 1359 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(eng): Audio: aac (HE-AACv2) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 47 kb/s (default) Metadata: handler_name : (...) -- https://drive.google.com/open?id=0B4UM6vTHw4pyMExQQ1lxZGp0N2c
02:10
creating a modern nodejs video rendering app (ffmpeg microservice / cloud hosting) - Martin Newest 'ffmpeg' Questions - Stack Overflow

I'm thinking of making a nodejs website like tunestotube.com or audioship.io that will: accept an audio file / image file input render a video using ffmpeg upload that video to youtube I just have a question on the best way to go about doing this, I want to host over GCP eventually, and am thinking about the best / most efficient way to handle the ffmpeg video rendering, since I want it to be scaleable and have a load balancer (ingress?) queue to handle getting multiple requests at once. Would it make sense to containerize my web (...)

4 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

21:40
How to skip a bad frame when encoding images to a video - Andrew Simpson Newest 'ffmpeg' Questions - Stack Overflow

I am using ffmpeg on raspberry pi to encode jpegs to an avi file. During testing i found sometimes the video is not produced. The error I see is that it stops on a file that ‘cannot be opened’. However, I can open it manually and view ok in an image viewer. But I will be happy if that file is just skipped and the video is created with the images it is happy with. Is there a flag/switch I can use to skip ‘bad’ images? This is my command line: ffmpeg -y -framerate 10 -i %06d.jpg (...)
20:35
How can ffmpeg scale videos to the same size, preserving their aspect ratio? - GreenTriangle Newest 'ffmpeg' Questions - Stack Overflow

(I have searched similar questions and haven't found anything that works the way I describe here.) I have a number of videos of varying sample and display aspect ratios(and different framerates and timebases). I want to concatenate them into one long video, like a playlist, which means re-encoding them. I want them to scale up or down to fit within the desired output size (768x432), preserving their aspect ratio by pillarboxing when necessary. I've tried -vf scale=768:432:force_original_aspect_ratio=decrease,pad=768:432:(ow-iw)/2:(oh-ih)/2, which produces a (...)
20:13
Collect AVFrames into buffer - mgukov Newest 'ffmpeg' Questions - Stack Overflow

I'm collect AVFrames into array and then free them but this causes memory leak. extern "C" #include #include #include #include AVFrame * createFrame() int width = 1280; int height = 720; AVPixelFormat format = AV_PIX_FMT_YUV420P; int buffer_size = av_image_get_buffer_size(format, width, height, 1); uint8_t * buffer = (uint8_t *)av_malloc(buffer_size * sizeof(uint8_t)); memset(buffer, 1, buffer_size); uint8_t *src_buf[4]; int src_linesize[4]; av_image_fill_arrays(src_buf, src_linesize, (...)
20:11
mergeToFile returns null - Andrew Roberts Newest 'ffmpeg' Questions - Stack Overflow

I am trying to use fluent ffmpeg to merge a bunch of audio files into a single file, yet I keep recieving an error that the output is null/ doesn't exist. My code: var ffmpeg = require("fluent-ffmpeg"); var command = ffmpeg(); for (var inputPath of filePaths) command.addInput(inputPath); console.log("Added path:" + inputPath); command .on('error', (err) => console.log('An error occurred: ' + err.message); ) .on('end', () => console.log('Merging finished !'); (...)
19:59
mkv (multiple audio and subtittles) to hls - guga Newest 'ffmpeg' Questions - Stack Overflow

On windows10 how to convert an mkv file to be streamed in hls (packets) ? I have a mkv containing a) Video in mp4 format (encoded with h264) to be used in several different resolutions 640x480, 960x720 etc b) 2 or more audio tracks (encoded as mp3 format) (The output can be in aac or mp3 work as well on streamings ?) c) 2 or more subtitles (built with srt or WebVTT format) The desired output format is webvtt I would like to create a playlist in m3u8 containing several small pieces (something around 256 kb each) of .ts file that can (...) -- https://kipalog.com/posts/FFMPEG-HLS-STREAM-MULTIPLE-AUDIO-SUBTITLES, https://www.martin-riedl.de/2018/08/
19:19
Convert image and audio in background to Video file in React Native - Foram Trada Newest 'ffmpeg' Questions - Stack Overflow

I am trying to convert the images to video with audio in the background in React Native. I had used ffmpeg but I am not getting the expected result. https://www.npmjs.com/package/react-native-ffmpeg Here is the code that I had tried! RNFFmpeg.execute('-i http://192.168.43.4/ReactFirstProject/images/song.jpeg -i http://192.168.43.4/ReactFirstProject/screens/music/frog.wav -c:v mpeg4 output.mp4').then(result => (console.log("RESULT:",result))) Can anyone suggest any other libraries for doing the same? Please help me out. I would be (...) -- https://www.npmjs.com/package/react-native-ffmpeg
18:44
ffmpeg audio encoder frame size - Jim Rhodes Newest 'ffmpeg' Questions - Stack Overflow

I need to convert audio data from AV_CODEC_ID_PCM_S16LE to AV_CODEC_ID_PCM_ALAW and I am using this code as an example. The example code does essentially this (error checking omitted for brevity): const AVCodec* codec = avcodec_find_encoder(AV_CODEC_ID_MP2); AVCodecContext* c = avcodec_alloc_context3(codec); c->bit_rate = 64000; c->sample_fmt = AV_SAMPLE_FMT_S16; c->sample_rate = select_sample_rate(codec); c->channel_layout = select_channel_layout(codec); c->channels = av_get_channel_layout_nb_channels(c->channel_layout); avcodec_open2(c, codec, (...) -- this
17:26
Unable to run command through Java, but can run it through cmd CreateProcess error=2, The system cannot find the file specified - Al G Johnston Newest 'ffmpeg' Questions - Stack Overflow

I am unable to convert my mp3s to wavs for easier data manipulation using Java. I can open a command prompt and copy the exact string stored in s when I debug and this will properly create the wav file. The code is below. I was able to use ffmpeg by building strings this way to split up a few mp3s into separate tracks based on a tracklist. I reinstalled Windows 10, so I'm assuming it has something to do with that. Is there a setting I have to change? Why would it run in the command prompt, but not with Java? package mp3towav; import java.io.File; import (...)
17:13
ffmpeg override output file if exists - Muhammad Omer Aslam Newest 'ffmpeg' Questions - Stack Overflow

I am creating a clip from an audio file .FLAC with a start and end time, here is my command. ffmpeg -i /audio/191079007530_1_01.flac -t 51 -ss 69 /clips/44z274v23303t264y2z2s2s2746454t234_clip.mp3 2>&1 >> /ffmpegLogs.log I use this command with my PHP code and my question is, When i run the above command on the console it asks me to override the output file if the output file already exists in the destination, what switch or extra command should I use to automatically override if the file (...)
14:50
ffmpeg fluent invalid frame size mp3 - Andrew Roberts Newest 'ffmpeg' Questions - Stack Overflow

I am trying to merge mp3 files in fluent-ffmpeg after recording it on my phone and sending it to a node js 8 server yet I keep recieving an error: [mp3 ⓐ 0x2a4cdff86c80] Format mp3 detected only with low score of 1, misdetection possible! [mp3 ⓐ 0x2a4cdff86c80] Failed to read frame size: Could not seek to 1026. /tmp/audio2208.mp3: Invalid argument at ChildProcess. (/srv/node_modules/fluent-ffmpeg/lib/ffprobe.js:233:22) at emitTwo (events.js:126:13) at ChildProcess.emit (events.js:214:7) at (...)
14:19
FFMpeg doesnt insert sound to converted media files - In-my-country-we-dont-use-name Newest 'ffmpeg' Questions - Stack Overflow

I am new at FFMpeg. I use this code to convert media files to WebM and MP4 formats: (It's php) // MP4 $video_mp4 = $output_name . '.mp4'; exec($ffmpeg . ' -i "' . $uploaded_file . '" -c:v libx264 -an "./converted/' . $video_mp4 . '" -y 1>convert.txt 2>&1', $output, $convert_status['mp4']); // Debug echo '' . print_r($output, 1) . ' '; // WebM $video_webm = $output_name . '.webm'; exec($ffmpeg . ' -i "' . $uploaded_file . (...)
16:16
use ffmpeg to extract video frames with time code specified on the SRT file - Allen Newest 'ffmpeg' Questions - Stack Overflow

Complete newbie on ffmpeg here. I have a video file and an SRT subtitle file. Is there any way I can have ffmpeg read the time code on the SRT and use that as an input parameter for ffmepg to specify exactly when to extract video frames? If this is too complex for ffmpeg, are there other approaches you can recommend to achieve what I am trying to do? Thank you guys in advance for your input. Allen
15:31
FFMPEG for android in Windows not successfully compile - Mr X Newest 'ffmpeg' Questions - Stack Overflow

I am trying to compile FFMPEG for android in Windows 8.1 but i got error at 32 line in build_android.sh ./build_android.sh: line 32: syntax error: unexpected end of file when i execute command in cygwin chmod +x build_android.sh ./build_android.sh If you are knows steps to compile ffmpeg for android in windows and how to use ffmpeg in android then pleas reply me. I am referencing . http://www.packtpub.com/sites/default/files/downloads/Developing_Multimedia_Applications_with_NDK.pdf , (...) -- http://www.packtpub.com/sites/default/files/downloads/Developing_Multimedia_Applications_with_NDK.pdf, https://trac.ffmpeg.org/wiki/CompilationGuide/Android, http://www.roman10.net/how-to-build-ffmpeg-with-ndk-r9
15:16
perspective correction example - alessandro Newest 'ffmpeg' Questions - Stack Overflow

I have some videos taken of a display, with the camera not perfectly oriented, so that the result shows a strong trapezoidal effect. I know that there is a perspective filter in ffmpeg https://ffmpeg.org/ffmpeg-filters.html#perspective, but I'm too dumb to understand how it works from the docs - and I cannot find a single example. Somebody can show me how it works? -- https://ffmpeg.org/ffmpeg-filters.html#perspective
12:12
getting video duration with ffmpeg, php function - keithp Newest 'ffmpeg' Questions - Stack Overflow

I have FFMpeg installed and I know it's functional, but i'm trying to get the duration time from a flv video through PHP but when I use this code: function mbmGetFLVDuration($file) /* * Determine video duration with ffmpeg * ffmpeg should be installed on your server. */ //$time = 00:00:00.000 format $ffmpeg = "../ffmpeg/ffmpeg"; $time = exec("$ffmpeg -i $file 2>&1 | grep 'Duration' | cut -d ' ' -f 4 | sed s/,//"); $duration = explode(":",$time); $duration_in_seconds = (...) -- http://www.videoaddsite.com/videos/intro.flv
12:00
php-ffmpeg get video duration - swg1cor14 Newest 'ffmpeg' Questions - Stack Overflow

When I try to get the duration of a video using the php-ffmpeg wrapper and ffprobe, I get a huge object instead of just the duration. $ffprobe = FFMpeg\\FFProbe::create(); $ffprobe->format($this->videoFile) ->get('duration'); $this->videoFile is /home/admin/........./5422346433.mp4 So it points to right file and the duration is listed in the giant object down in => Array ( [0] => FFMpeg\\FFProbe\\DataMapping\\Format Object ( [properties:FFMpeg\\FFProbe\\DataMapping\\AbstractData:private] => Array ( (...)
10:34
Ffmpeg unsharp light - user13125448 Newest 'ffmpeg' Questions - Stack Overflow

im trying to sharpen a video with unsharp like so ffmpeg -i video.mkv -c:v libx264 -vf unsharp,scale=1280:-2:flags=lanczos -pix_fmt yuv420p -c:a aac output.mkv But the unsharp filter applies sharpness too strong is there a setting for a more lighter sharpness something like watching a 1080p video but actually is 720p.
09:56
Repl.it and FFmpeg - user12238231 Newest 'ffmpeg' Questions - Stack Overflow

Hi I am building a discord bot and would like to use ffmpeg in it but am working on repl.it. How can I use ffmpeg on repl.it if I can? This is for translating a .webm file into an .mp4 file, running on python 3.7.4. I have had a look on the repl.it forums and on Stack Overflow but cannot find any information. Thanks! -- repl.it
07:11
How can i build x264 and fdk-aac for android with ndk? - Pradeep Simba Newest 'ffmpeg' Questions - Stack Overflow

How can i build x264 and fdk-aac for android with ndk? I build x264 and fdk-aac with ndk. But, it not done. I modified this build file and I build x264 and fdk-aac.But,it not done. How can I solve this? -- file
00:15
How to calculate bitrate of lower resolution videos created from high resolution video? - Ryosuke Newest 'ffmpeg' Questions - Stack Overflow

I am trying to implement HLS video using ffmpeg. Suppose I have a video with following specs: 1080x1920 bitrate: 20971649 Now I have to write a command to convert it to for example: 720p. So now the actual converted video by ffmpeg has bitrate: 760808. Is there a way that I can know this bitrate before hand, so that I can include in the master playlist correctly?

3 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

23:27
FFmpeg & Black and White Conversion - Jesse James Richard Newest 'ffmpeg' Questions - Stack Overflow

How to convert a video to black and white using ffmpeg?
22:55
FFMPEG stream from sdp to youtube/facebook live(RTMP) - Akil Newest 'ffmpeg' Questions - Stack Overflow

Similar to this question, I'm trying to stream to Youtube/Facebook live (rtmp) via Ffmpeg. The server on which ffmpeg is installed receives a rtp stream (source of the stream uses Vp8 and opus as the codecs), i then use the sdp given below as input for the ffmpeg command SDP: v=0 o=- 0 0 IN IP4 127.0.0.1 s=FFMPEG Test c=IN IP4 127.0.0.1 t=0 0 a=tool:libavformat 56.15.102 m=audio 10004 RTP/AVP 111 a=rtpmap:111 OPUS/48000/2 m=video 10006 RTP/AVP 100 a=rtpmap:100 VP8/90000 a=fmtp:100 packetization-mode=1 (...)
22:45
ffmpeg record screen file formats - New_Dev Newest 'ffmpeg' Questions - Stack Overflow

Good day, I'm currently writing a bash script which records the screen under certain conditions. The problem is that only avi works as a file extension for recording the screen. This script is going to be used on an Raspberry Pi and currently I get on a decent virtual machine only 10-20 fps (goal would be around 30 fps). I think .avi is not suited for my project. But .mpeg and .mp4 are not working for recording. I tried recording with .avi and then converting it in .mp4, but I have limited memory and .avi ist just too big in size. I use currently the following (...)
21:47
How to save locally rtmp stream on react native? - RanST Newest 'ffmpeg' Questions - Stack Overflow

I'm using React Native to display a live stream from RTMP server - and it works great using NodePlayerVideo component from react-native-nodemediaclient. However, I also need to save that same stream to a local file on the device. How can I do it? My idea is to use react-native-ffmpeg but it doesn't work. What is the right ffmpeg command to use? What is the recommended solution?
20:54
Using ffmepg wrapper to convert images to movie file - reborn Newest 'ffmpeg' Questions - Stack Overflow

I have recently been using the ffmpeg wrapper by Vitaliy Fedorchenko called NReco.VideoConverter. It's pretty great and I have managed to write another application with it that I hope to release soon after some testing and I purchase the license for the wrapper (it's a cool watermarker for videos). I am now trying to use that same wrapper to encode a video from still images, but sadly there is very little documentation available and I am feeling my way int he dark a little. I am hopeful that someone familiar with the wrapper might be able to help. I collect (...) -- application picture, https://www.nrecosite.com/doc/NReco.VideoConverter/, https://www.nrecosite.com/doc/NReco.VideoConverter/html/M_NReco_VideoConverter_FFMpegConverter_ConvertMedia.htm, https://www.nrecosite.com/doc/NReco.VideoConverter/?topic=html/M_NReco_VideoConverter_FFMpegConverter_ConcatMedia.htm
20:15
When I build ffmpeg with ndk it does not create .so and .a files for libavresample and libpostproc - Pradeep Simba Newest 'ffmpeg' Questions - Stack Overflow

When I build ndk with ffmpeg it does not create .so and .a files for libavresample and libpostproc . I build ffmpeg with this files. But , it does not create .so and .a files for libavresample and libpostproc . How can I build .so and .a files for libavresample and libpostproc ? -- files., ,
19:32
Cannot get transparent background with ffmpeg (HEVC to VP8/VP9) - Alexander BC Newest 'ffmpeg' Questions - Stack Overflow

I want to convert a mp4 video to any other format that supports video-transparency. I've done it in the past but I cannot get it to work again. I've followed the same guides as before: Convert mp4 to webm with transparency? Convert mov with Alpha to VP9 Webm with Alpha Using ffmpeg Error "Transparency encoding with auto_alt_ref does not work" when converting a .mov with Alpha to .webm with alpha with ffmpeg The input video is a HEVC (h265), and the background I want to remove is full white. I'm using the following command to (...)
19:13
Best way to take a live-video-stream and split the image into thirds to broadcast out? - user1258530 Newest 'ffmpeg' Questions - Stack Overflow

Can anyone tell me the best tools to make this work? I basically need to pass a video-feed from an Arduino device, stream it into the cloud, and then have the cloud-video-server "slice" that video feed into thirds (top third, middle third, and bottom-third), and simultaneously stream each of those third-video-slices out to the world via m3u8 (HLS) endpoint. I know I can pass video up to the cloud via ffmpeg or via RTMP - - - but I haven't found the method yet for the cloud-video-server-based "slicing" process. I haven't found an ffmpeg way to do it, and I haven't (...)
18:08
Ffmpeg scene overlay not working as intended - Bertgram Newest 'ffmpeg' Questions - Stack Overflow

I simply want to use scene detection on a video, retrieve thumbnails, tile them and overlay them over a solid background. However the tiled thumbnails are not showing up. The solid background shows blank. Here is my code: ffmpeg -f lavfi -i color=c=red:s=640x480:d=0.5 -ss 00:00:10 -i "input.mp4" \\ -filter_complex "[1]select='gt(scene\\,0.4)', scale=100:100, tile=3x3 [overlay]; \\ [0][overlay]overlay=0:100" -frames:v 1 -y output.png When I change scene detection to select='not(mod(n\\,100))' then it is working: ffmpeg -f (...)
18:07
FFmpeg, how to embed cover art (image) to .m4a - Yaroslav Newest 'ffmpeg' Questions - Stack Overflow

Is there any way to embed cover art to m4a files? This one works well for mp3 but doesn't work for m4a ffmpeg -i tests/in.m4a -i cover.jpg -map 0:0 -map 1:0 -acodec copy \\ -id3v2_version 3 tests/out.m4a
18:07
Kurento Composite Grids Recording - vourla Newest 'ffmpeg' Questions - Stack Overflow

I have 2 WebRtcEndpoint(caller&callee). Those endpoints are connected each other to share their streams. There is no problem in this communication. Each peer gets the other peer's stream without any frame lost. I want to record this two stream side by side. As a result of my search, kurento composite can be used to record caller and callee streams side by side. But this way of recording causes a lot of frame lost on the record file. My implementation: // To connect (...)
17:49
Why changing frequency doesn't affect sdl audio playback speed (emscripten)? - Erkin Kurt Newest 'ffmpeg' Questions - Stack Overflow

I am trying to write sdl2 video player using ffmpeg-sdl2 and emscripten. I have a function that decodes the packet and adds the buffer to SDL_QueuAudio. I call this queueAudioFrame() in js like this: setInterval(function () this._queueAudioFrame(); , 1); This is the C side of the implementation: int DecodeAudioPacket(AVPacket packet, AVCodecContext* ctx, uint8_t* audioBuf, int bufSize) AVFrame* frame = NULL; uint8_t converted_data[(192000 * 3) / 2]; uint8_t* converted; int len1, len2, dataSize = 0; if (...)
16:32
How do i convert videos uploaded by user to .swf? - Anish Silwal Newest 'ffmpeg' Questions - Stack Overflow

I am creating a website which enables to upload videos. But we know that user can upload any kind of video but the browser can't play them. So, I thought that I somehow can convert them into .swf and play them using a flash player. I tried to use ffmpeg-php but it didn't worked. my code was: shell_exec('ffmpeg -i in.mp4 out.swf'); It does not show any error neither it returns out.swf. Please! help (...)
15:24
How do you convert an entire directory with ffmpeg? - Eugene Newest 'ffmpeg' Questions - Stack Overflow

How do you convert an entire directory/folder with ffmpeg via command line or with a batch script?
15:04
TVHeadend not using codec copy on an IPTV stream? - petaire Newest 'ffmpeg' Questions - Stack Overflow

So I'm using the great TVHeadend, which is in my case a DVB-T or IPTV server that can record greatly some inputs. This is a great piece of software, which I recommend much. But I'm a little bit confused in here. So I've set up a tvheadend on a raspberry pi 4, because I need for my work to record a lot of tv programs. I appreciate TVheadend very much on an other installation, and so are my coworkers who also needs to use it and not a CLI only interface (that's relevant you'll see). So when I'm using a simple ffmpeg command like this (...) --
14:00
Concatenate mp4 video files using ffmpeg on nodejs - Romualdo Arrechea Hernández Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to concatenate several videos using FFmpeg with Nodejs. I'm receiving the "No such file or directory" error. The code wrote is: const glob = require("glob"); //store all the filenames with path to the videos var inputVideos = glob.sync("/home/r/clips/*.mp4"); const output = "./output/output.mp4"; const util = require("util"); const exec = util.promisify(require("child_process").exec); async function concatVideos(inputVideos, outputVideoPath) //imported to get the name of videofile easily var path = (...)
12:41
Restart environment and script during batch script - Nimble Newest 'ffmpeg' Questions - Stack Overflow

I've built a few FFmpeg powershell scripts for me and a few others to use and I'm attempting to make the setup and update process as easy as possible. The end goal is to be able to run 1 batch file that installs Chocolatey, FFmpeg, git, clones the github repo (for updates), and edits the Windows registry to add the actual FFmpeg powershell scripts / console programs to the Windows Explorer contextual menu. This way I just pass them the folder containing everything once and any time I change or add something to the project I can just tell them to run the batch file again, and (...)
11:30
Muxing raw h264 + aac into mp4 file with av_interleaved_write_frame() returning 0 but the video is not playable - Jaw109 Newest 'ffmpeg' Questions - Stack Overflow

I have a program [1] that muxing audio and video into mp4 file(in idividual worker thread, retrieving audio/video frame from a streaming daemon). The audio is perfectly played in VLC, but the video is not playable, VLC debug logs show the start-code of video frame is not found. I have another demuxing program [2] to retrieve all the frame to see what had happened. I found the video frame is modified 00000001 674D0029... was modified into 00000019 674D0029... (framesize is 29) 00000001 68EE3C80... was modified into 00000004 68EE3C80... (framesize is 8) 00000001 (...)
11:43
ffmpeg doesn't detect the subtitle format (webvtt) and refuses to copy it - Thomas Newest 'ffmpeg' Questions - Stack Overflow

I am trying to re-encode the audio on some video files. I want to copy the video and subtitles without touching them, however, ffmpeg doesn't detect the format of the subtitle (which is webvtt) and refuses to do anything. fmpeg -copy_unknown -analyzeduration 2000M -probesize 2000M -i input.mkv -map_metadata 0 -map 0 -c copy -c:a:0 aac -b:a 384k output.mkv [matroska,webm ⓐ 0x5597558e4040] Unknown/unsupported AVCodecID S_TEXT/WEBVTT. [matroska,webm ⓐ 0x5597558e4040] Could not find codec parameters for stream 2 (Subtitle: none): unknown codec Consider (...) --
09:22
What is the best solution of motion interpolation by CPU? - Stacker Dragon Newest 'ffmpeg' Questions - Stack Overflow

I've been using FFmpeg's "minterpolate" filter to implement motion interpolation to get a higher frame rate for a while. However, because "minterpolate" doesn't support hardware acceleration and multithread, it is very slow to finish that process, particularly on devices that only have CPU, which make the situation worse because I cannot use neural network such as DAIN(by SJTU). Thus, I would like to ask for some alternatives for "minterpolate" filter, which is supposed to be faster and has a decent quality. I knew SVP can do, but it is not open-sourced (...) -- DAIN
08:11
FFmpeg - Overlay one video onto another video? - cdrev Newest 'ffmpeg' Questions - Stack Overflow

I understand that this is a very open ended question. I have done some initial reading into FFmpeg, but now require some guidance. Problem I have a video input.mov. I would like to overlay another video on top of overlay.wov. The result should be a single video (output.mov). Notes Done some initial reading into FFmpeg and read this question. Thanks - C. Edits Backend is Go/Ruby. Open to using a new language. The audio from the first video should be kept. Setting the (...) -- FFmpeg
08:06
how can you see av_dump_format print messsage in android logcat - wei wang Newest 'ffmpeg' Questions - Stack Overflow

i am just wondering... how can you see av_dump_format print messsage in android logcat?
07:40
How to decode MP3 using libmp3lame decoder using ffmpeg command line? - Kumar Newest 'ffmpeg' Questions - Stack Overflow

I need to decode .mp3 file using libmp3lame decoder in ffmpeg, this ffmpeg build contains libmp3lame. Decoded output can be .wav/.raw format.So can anyone help me how to decode this using ffmpeg command line.I'm using windows 8.1 os.
07:01
ffmpeg .bat script to change frame rate for multiple clips in a folder? - Dan Newest 'ffmpeg' Questions - Stack Overflow

How do I write a .bat file in Windows 10 that changes the frame rate for multiple mp4 video clips in a folder? For example; change the frame rate from 50fps to 25fps (without re-encoding or dropping frames, so that footage is essentially slowed down.) At the moment these are the commands I've tried using in two separate .bat text files. (I'd like to combine them but don't know how yet). for %%A IN (*.mp4) DO ffmpeg -y -i "%%A" -c copy -f h264 "%%A.h264" for %%A IN (*.h264) DO ffmpeg -y -r 25 -i "%%A" -c copy "%%A_25.mp4" (...)
06:59
How can I build .a files with ffmpeg? - Pradeep Simba Newest 'ffmpeg' Questions - Stack Overflow

I followed this tutorial and build ffmpeg. But, it only build .so files and include folder. I want to build .a files. My build files. How can I build .a files with ffmpeg? -- tutorial, files.
06:18
ffmpeg nvidia hwaccel yuv444p raw frame output - 慕容风 Newest 'ffmpeg' Questions - Stack Overflow

I use ffmpeg to do frame decimation, millions of video I have to use nvidia gpu card (tesla P4) to optimize performance my ffmpeg command is ffmpeg -hwaccel cuvid -c:v h264_cuvid -i ./a.mp4 -c:v nvenc -vf "scale_npp=format=yuv444p" -r 1 ./\\%08d.raw but the output data format is weird, I don't know what the format is and how to decode it I want to know how to decode these data or how to output ream rawdata, can anybody help me? Log: built with gcc 8.2.0 (GCC) configuration: --cc=/opt/compiler/gcc-8.2/bin/gcc (...)
05:48
Screen capture WITH audio in ffmpeg - Adam Kurkiewicz Newest 'ffmpeg' Questions - Stack Overflow

I am using ffmpeg built from source at this revision in Fedora 20. I am able to record audio perfectly fine with the command: FFmpeg/ffmpeg -f alsa -ac 2 -i pulse -- output.wav However, when I try both screen capture and audio, like this: FFmpeg/ffmpeg -video_size 800x600 -framerate 25 -ac 2 -f x11grab -i :0.0+0,0 -ac 2 -f alsa -i pulse -ac 2 -acodec copy output.mpeg -ac 2 I'm getting a video with 0 audio channels, which I can check running FFmpeg/ffplay output.mpeg Input #0, mpeg, from (...) -- this revision
04:33
Capture Windows screen with ffmpeg - kamae Newest 'ffmpeg' Questions - Stack Overflow

The ffmpeg is cross-platform and very powerful software to handle video/audio or to stream it. On Linux ffmpeg can capture X11 screen with a command below: ffmpeg -f x11grab -r 25 -s cif -i :0.0 out.mpeg But is it possible to grab Windows Desktop with ffmpeg? -- ffmpeg
04:25
Concatenating videos using ffmpeg writes over empty audio stream - Rutwik Kharkar Newest 'ffmpeg' Questions - Stack Overflow

I have 4 movie files that I am trying to overlay and concatenate: Intro file with an empty audio channel (generated using lavfi) Main movie file(s) that need to be concatenated and trimmed Watermark that needs to be overlaid on top of 2 An outro movie that also has an empty channel. Here is the command I am using to do all this: ffmpeg -i temp_intro.mp4 -f concat -i tempFile.txt -i scoreboard.mp4 -i temp_outro.mp4 \\ -filter_complex (...)
00:21
FFMPEG mkv to mp4 conversion lacks audio in HTML5 player - fmc Newest 'ffmpeg' Questions - Stack Overflow

I used ffmpeg to convert an mkv file to mp4 using this command line: ffmpeg -i input.mkv -c copy file-1.mp4 The resulting mp4 plays fine (video and audio) on Linux Mint's Xplayer. But after uploading file-1, it played with no audio. So I uploaded another mp4 file-2, one I didn't have to convert, and it plays both video and audio without a problem. So whatever's going on with file-1 seems to be with my use of ffmpeg. The player I'm using is called afterglow. But the HTML5 player handles these two files the same way: file-1 & (...)

2 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

20:03
How to write data captured from Debug Console to a textBox in WinForms? [closed] - Serhat Çelik Newest 'ffmpeg' Questions - Stack Overflow

I run a basic FFmpeg command and tried to capture live output like below: private void button1_Click(object sender, EventArgs e) using (Process ffmpeg = new Process()) ffmpeg.StartInfo.UseShellExecute = false; ffmpeg.StartInfo.CreateNoWindow = true; ffmpeg.StartInfo.RedirectStandardOutput = true; ffmpeg.StartInfo.RedirectStandardError = true; ffmpeg.StartInfo.RedirectStandardInput = true; ffmpeg.StartInfo.FileName = "ffmpeg.exe"; ffmpeg.StartInfo.Arguments = $"-v quiet -stats -y -i C:\\\\Users\\\\user\\\\in.mp4 (...)
22:04
Save a Twilio of format 8Khz `mulaw` to a file - Joe Newest 'ffmpeg' Questions - Stack Overflow

There are a couple of posts that address the question, but I wasn't able to successfully playback a saved file. It usually plays back at half speed. Convert 8kHz mulaw to 16KHz PCM in real time Using the accepted answer in the above question, I saved the raw and base64 decoded the audio in go: // Media event type Media struct Track string `json:"track"` Chunk string `json:"chunk"` Timestamp string `json:"timestamp"` Payload string `json:"payload"` // SaveAudio will upgrade connection to websocket and save the audio (...)
22:02
How to stream with ffmpeg via http protocol - Boehmi Newest 'ffmpeg' Questions - Stack Overflow

I'm currently doing a stream that is supposed to display correctly within Flowplayer. First I send it to another PC via RTP. Here, I also checked with VLC that the codec etc. arrive correctly, which they do. Now I want to expose this stream to Flowplayer as a file, so it can be displayed, via something I used in VLC: http://localhost:8080/test.mp4 for example. The full line I got is: ffmpeg -i input -f mp4 http://localhost:8080/test.mp4 However, no matter how I try to do this, I only get an input/output error. Is this only possible with (...)
19:49
Running ffmpeg command through python script - user2408159 Newest 'ffmpeg' Questions - Stack Overflow

I am trying to execute ffmpeg commands in python. When the following command was executed from command line in windows cmd it worked: C:\\FFmpeg\\bin\\ffmpeg -rtbufsize 100000k -r 65535/2733 -f dshow -i audio="virtual-audio-capturer":video="screen-capture-recorder" output100.avi However when I try to run the this command in python in this way: cmd='C:\\FFmpeg\\bin\\ffmpeg -rtbufsize 100000k -r 65535/2733 -f dshow -i audio="virtual-audio-capturer":video="screen-capture-recorder" output100.avi' subprocess.call(cmd, shell=true) it (...)
20:08
Reencode videos from 30fps to 60fps using ffmpeg - RonPringadi Newest 'ffmpeg' Questions - Stack Overflow

If I have an mp4 with 30 fps, how do I re-encode it to 60 fps using ffmpg without making the movie speeding up faster (still looking normal)? My ffmpeg ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
19:27
I am trying to develop On demand and live streaming video analysis using java.? - PATEL UJASH Newest 'ffmpeg' Questions - Stack Overflow

After a lot of R&D I got something for video analysis.I am gonna use Kafka, spark and openCV. But i am suck in how to deliver streaming on demand and live streaming video. I got FFMPEG help to capture video from different devices or you can stream any Video File too. FFMPEG also help in Video encoding and decoding also. But after encode the video we need to send that data Into any streaming engine like wowza streaming engine, Red5 or AWS media elemental services. I watch some video they have used OBS software for stream. What if i want to stream it using FFMPEG and publish (...)
18:43
Is there a way to check the resolution of a file in FFMPEG? [duplicate] - Kaxemer Newest 'ffmpeg' Questions - Stack Overflow

I'm gathering some videos that I want to concatenate together. However, these videos are coming from different sources and might have different resolutions. Is there a way I can check what resolution they would be in FFMPEG programmatically? I know that you cannot concatenate videos with different resolutions, so I want to be able to make the videos match the biggest resolution before concatenation.
18:20
Fast detect QR algorithm on video file - Сергей toff Newest 'ffmpeg' Questions - Stack Overflow

Can any one share how to fast detect QR code on bitmap with out recognize I Use Zxing and Acord FFMPEG for get QR code seconds on video. But it's very hard to processor time. BarcodeReader reader = new BarcodeReader(); reader.AutoRotate = true; reader.Options.TryHarder = false; reader.Options.PureBarcode = false; reader.Options.PossibleFormats = new List(); reader.Options.PossibleFormats.Add(BarcodeFormat.QR_CODE); return reader; it's skeleton class use instance of this static Result (...)
17:22
How can I get the volume of sound of a video in Python using moviepy? - GiannisIordanou Newest 'ffmpeg' Questions - Stack Overflow

I want to get the volume of sound of a video so I use the following: import numpy as np # for numerical operations from moviepy.editor import VideoFileClip, concatenate clip = VideoFileClip("soccer_game.mp4") cut = lambda i: clip.audio.subclip(i,i+1).to_soundarray(fps=22000) volume = lambda array: np.sqrt(((1.0*array)**2).mean()) volumes = [volume(cut(i)) for i in range(0,int(clip.audio.duration-2))] But I get these errors: Exception AttributeError: "VideoFileClip instance has no attribute 'reader'" in > (...)
17:00
Documented ffmpeg commands not recognized by ffmpeg - agconti Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to use options like, ldash and http_opts, as the dash muxer docs describe but FFmpeg doesn't recognize them. I'm on the latest released version of ffmpeg, v4.2.2. I see the changes in the ffmpeg master branch but not in the v4.2 release branch. Does ffmpeg not recognize them because they haven't been released yet? Here's the dash muxer docs for reference: https://ffmpeg.org/ffmpeg-all.html#dash-2 Here's a minimal example command with uncut output: Andrews-MacBook-Pro :: dev/test ‹master› » ffmpeg -re -i test.mp4 \\ (...) -- https://ffmpeg.org/ffmpeg-all.html#dash-2
13:55
Rails 5 - Concurrent large Video uploads and FFMPEG encoding in the background is making the server very slow - Milind Newest 'ffmpeg' Questions - Stack Overflow

I have a working Rails 5 apps using Reactjs for frontend and React dropzone uploader to upload video files using carrierwave. So far, what is working great is listed below - User can upload videos and videos are encoded based on the selection made by user - HLS or MPEG-DASH for online streaming. Once the video is uploaded on the server, it starts streaming it by:- FIRST,copying video on /tmp folder. Running a bash script that uses ffmpeg to transcode uploaded video using predefined commands to produce new fragments of videos inside /tmp (...) -- React dropzone uploader, HLS, MPEG-DASH
13:07
Combining zoompan slideshow with watermark overlay in FFMPEG - ricky_bobby43 Newest 'ffmpeg' Questions - Stack Overflow

I've created a slideshow from a series of images with this ffmpeg -i img%d.jpg -vf zoompan=d=(7+1)/1:s=6144x3072:fps=1,framerate=25:interp_start=0:interp_end=255:scene=100 -c:v mpeg4 -q:v 2 out.mp4 I have a semi-transparent watermark (inx.png) that I am applying for the first 3 seconds, but currenly using a separate command in FFMPEG: ffmpeg -i 6144out.mp4 -loop 1 -i inx.png -filter_complex "[1:v]format=argb,geq=r='r(X,Y)':a='0.5*alpha(X,Y)'[foo]; [foo]fade=out:st=3:d=1:alpha=1[bar], [0:v][bar]overlay" -vcodec libx264 (...)
12:37
FFmpeg Single Input, Seek to Multiple Outputs - shesharp Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to get multiple snapshots of a single input file using Input Seeking. I want to seek to different keyframes and save each to different output images. I can use this using multiple calls: ffmpeg -ss 280 -i sample.mp4 -aspect 1.7777777777778 -vframes 1 -qmax 9 -qmin 8 -bt 10000000 -y -pix_fmt yuv420p out1.jpg ffmpeg -ss 300 -i sample.mp4 -aspect 1.7777777777778 -vframes 1 -qmax 9 -qmin 8 -bt 10000000 -y -pix_fmt yuv420p out2.jpg ffmpeg -ss 302 -i sample.mp4 -aspect 1.7777777777778 -vframes 1 -qmax 9 -qmin 8 -bt 10000000 -y -pix_fmt yuv420p (...) -- Input Seeking
09:49
How to change voice formant? - Joys Newest 'ffmpeg' Questions - Stack Overflow

Trying to change a voice with python on linux I found that I can change the pitch: ffmpeg -i 1.wav -af asetrate=44100*3/4,atempo=4/3,aresample=44100 2.wav or sox pitch The question is how to change the formant. There is a rubberband wrapper for ffmpeg which suppose to do that but there is no example in google.
08:56
How to merge two videos from Firebase Database and local file? [closed] - i i Newest 'ffmpeg' Questions - Stack Overflow

I need to merge two videos from a local file and Firebase Storage. How can I solve it? I can get the file from a local file but I couldn't get the video from Firebase Storage. Part of my code: if(secondlength >0) if (secondlength > secondinterval) final File source = new File(files.get(1)); // String filename = "https://firebasestorage.googleapis.com/v0/b/***.appspot.com/o/video_covers%2Fvideo_ornek.mp4?alt=media&token=10c3fa8a-4510-4984-8247-8036fffe18b3"; // filesname.add(filename); // final File output = new (...)
08:35
Cannot play audio with FFPLAY - Javier Urrestarazu Newest 'ffmpeg' Questions - Stack Overflow

I am trying to stream the sound of a Linux machine via UDP to a Windows 7 64 bit machine. The command for streaming the audio is: ./ffmpeg -f oss -i /dev/dsp -f mpegts udp://192.168.99.35:11222 It seems to work well. However, when I try to play the audio with the following command: ffplay -fflags nobuffer udp://127.0.0.1:11222 I get the following error: No more combinations to try audio open failed And nothing plays. I have no clue where the issue is coming (...)
07:37
Multiple running with executable built with pyinstaller - seokrae.kim Newest 'ffmpeg' Questions - Stack Overflow

I build my main.py to exe by pyinstaller like this. pyinstaller main.py --add-binary C:\\sources\\untitled\\venv\\Lib\\site-packages\\cv2\\opencv_videoio_ffmpeg420_64.dll;. It is simple RTSP receiver program so it need opencv_ffmpeg binary to run. Running command like this main.exe -address rtsp://127.0.0.1/profile1/media.smp It works I expected. But when the process running in multiple, (I mean more than 2 same process running) all process not responding and shutting down. I try clone whole result (dist folder content) to (...)
04:48
Adding current time as timestamp in H.264 raw stream with few frames - Michaël Newest 'ffmpeg' Questions - Stack Overflow

I have a program that spits out an H.264 raw stream (namely, screenrecord on Android). I'm using FFmpeg to add a PTS (presentation time stamp) on the frames as follows: $ my-program | ffmpeg -i - -filter:v setpts='(RTCTIME - RTCSTART) / (TB * 1000000)' out.mp4 This filter computes the current time, and puts it as the PTS. The trouble is that my-program does not produce any output if there isn't any change in the video. Since FFmpeg seems to wait for a bunch of frames before putting them through the setpts filter, the computed PTS (...) -- FFmpeg
04:28
Visualizing ffmpeg benchmarks - Saurabh P Bhandari Newest 'ffmpeg' Questions - Stack Overflow

I have generated benchmarks for comparing two approaches taken for scaling down video files (mp4) using ffmpeg tool. The benchmarks are logged in this format : x.mp4 Output_Resolution : 360p Method : A real 0m26.817s user 1m38.058s sys 0m0.504s Method : B, some-parameter-for-B : b1 real 0m26.465s user 1m42.824s sys 0m1.111s Method : B, some-parameter-for-B : b2 real 0m26.236s user 1m42.194s sys 0m0.862s Method : B, some-parameter-for-B : b3 real 0m25.050s user (...) --
04:20
I tried programming a discord bot for music, it joins the channel, it apparently "speaks" but i can't hear anything - borax Newest 'ffmpeg' Questions - Stack Overflow

I tried to code it alone, but I got the same problem, then I copied the code from https://gabrieltanner.org/blog/dicord-music-bot and it persists. I have downloaded FFmpeg, but I still think the problem lies there. Any suggestions? (it's my first time here, I don't know how much of the code is relevant, also, i get this Error: FFmpeg/avconv not found!) const Discord = require('discord.js'); const client = new Discord.Client(); const ytdl = require("ytdl-core"); const token = 'REDACTED'; const prefix = (...) -- https://gabrieltanner.org/blog/dicord-music-bot
05:29
When I build ndk with .a files it comes like this `error adding symbols: File in wrong format` - Pradeep Simba Newest 'ffmpeg' Questions - Stack Overflow

When I build ndk with .a files it comes like this error adding symbols: File in wrong format. WORKING_DIR := $(call my-dir) include $(CLEAR_VARS) LOCAL_PATH := $(WORKING_DIR)/../third_party/lame/libmp3lame LOCAL_MODULE := lame LOCAL_C_INCLUDES := $(WORKING_DIR)/../third_party/lame/libmp3lame \\ $(WORKING_DIR)/../third_party/lame/include LOCAL_CFLAGS := -DSTDC_HEADERS -std=c99 LOCAL_ARM_MODE := arm APP_OPTIM := release LOCAL_SRC_FILES := VbrTag.c \\ bitstream.c \\ encoder.c \\ fft.c \\ gain_analysis.c \\ id3tag.c (...) -- , , ,
02:39
Cut video with ffmpeg. - rinofcan Newest 'ffmpeg' Questions - Stack Overflow

This is my idea. I want to cut the first 10s of video and the last 10s of video Thank for help --

1 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

23:19
Use FFmpeg to calculate Optical Flow magnitude - Tina J Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to use FFmpeg to calculate the total optical flow value (or a motion value) in a short video. Is there a command to do that? Would be open to any alternative approach as well, if it is faster. I'm currently using Python and openCV to do that: def getOpticalMag(prev_image, curr_image): prev_image_gray = cv2.cvtColor(prev_image, cv2.COLOR_BGR2GRAY) curr_image_gray = cv2.cvtColor(curr_image, cv2.COLOR_BGR2GRAY) flow = cv2.calcOpticalFlowFarneback(prev_image_gray, curr_image_gray, flow=None, pyr_scale=0.5, levels=1, (...)
20:58
Destreamer (FFMPEG / Youtube-DL) - Can't download video, Invalid DTS, Invalid timestamps message - toprun91 Newest 'ffmpeg' Questions - Stack Overflow

I'm using Destreamer a program that essentially lets you download microsoft stream videos by passing a key URL with a cookie down to Youtube-dl which then calls into ffmpeg. Whenever I try to download a video using this program I get tons of repeating lines of text (errors?) like this: [hls ⓐ 000002487687c880] Invalid timestamps stream=0, pts=56400120, dts=56402820, size=6081 [mp4 ⓐ 0000024876f525c0] Invalid DTS: 53717850 PTS: 53715150 in output stream 0:0, replacing by guess [mpegts ⓐ 0000024876dec540] Invalid timestamps stream=0, pts=56406060, (...) -- Destreamer
20:41
Adding current time as timestamp in h264 raw stream with few frames - Michaël Newest 'ffmpeg' Questions - Stack Overflow

I have a program that spits out an h264 raw stream (namely, screenrecord on Android). I'm using ffmpeg to add a PTS (Presentation Time Stamp) on the frames as follows: $ my-program | ffmpeg -i - -filter:v setpts='(RTCTIME - RTCSTART) / (TB * 1000000)' out.mp4 This filter computes the current time, and puts it as the PTS. The trouble is that my-program does not produce any output if there is no change in the video. Since ffmpeg seems to wait for a bunch of frames before putting them through the setpts filter, the computed PTS won't be (...)
20:13
Time FFMPEG takes to encode a video file - amateur Newest 'ffmpeg' Questions - Stack Overflow

I have recently been working with FFMPEG to do some manipulation on video files, becoming aware of the syntax etc and have found it very helpful. I am looking for some feedback though on the speed it takes to encode file. For example, I run the following command against a video file, 1 hour in length, file extension .mov and 4GB in size, and the command takes just over 4 hours to run. It produces a file 2.2GB in size. I am running it on a high spec i7 laptop. ffmpeg -i "C:\\MyInputFile.mov" -b:v 4500k -bufsize 4500k -r 50 -bsf:a aac_adtstoasc -vf scale=1920:1080 (...)
18:47
How to smoothly move logo from left to right using FFMPEG? - Andrew00 Newest 'ffmpeg' Questions - Stack Overflow

I have 30 mins video and a png logo. I want this logo to move left corner to right on top throughout the video. I tried to do this using overlay, where x = n (current frame) / constant, but it moves choppy, by pixels. How to move an overlay smoothly?
18:29
I am getting "Stream specifier ' ' in filtergraph description" in ffmpeg - Dave B Newest 'ffmpeg' Questions - Stack Overflow

I am generating 10 seconds of silence using an image. Here is my command ffmpeg -loop 1 -framerate 24 -t 10 image.jpg -f lavfi -t 10 -i anullsrc -filter_complex "[0][1]concat=n=2:v=1:a=1" out.mp4 Also, I have tried ffmpeg -loop 1 -framerate 24 -t 10 beach.jpg -f lavfi -t 10 -i anullsrc -filter_complex "[0:v][1:a]concat=n=2:v=1:a=1" out.mp4 I am getting following errors ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers built with Apple clang version 11.0.0 (clang-1100.0.33.17) configuration: (...)
17:28
ffmpeg: how to concatenate multiple videos of different codecs and resolutions passing them using glob - Santhosh Yedidi Newest 'ffmpeg' Questions - Stack Overflow

I have n number of mp4 files in a folder. All of them are of different frame sizes and codecs. Now to concatenate them into one video. I tried ffmpeg -i *mp4 -c:v libx264 -c:a aac -movflags +faststart output.mp4 It says *.mp4, file not found
16:44
FFmpeg Combining a list of images with a fade - UsuallyHelpless Newest 'ffmpeg' Questions - Stack Overflow

I have images for sort of a slideshow in a folder. I want to overlay them on a moving background with a fade in between. Like when an image is about to change, it slowly fades out and then another image starts to fade in to replace the previous one. This is what I have but it only works for ONE image. How to do this with multiple images? ffmpeg -i background.mp4 -f concat -i list.txt -filter_complex "[1:v]fps=25,fade=in:st=1:d=3,fade=out:st=5:d=3[ovrl];[0][ovrl]overlay" (...)
16:24
why type casting on non-pointer struct give syntax error - Sany Liew Newest 'ffmpeg' Questions - Stack Overflow

I am using Visual C++ express 2008 try to compile code similar to below: no problem ... AVRational test = 1, 1000; ... but has problem when it is as below: ... AVRational test = (AVRational)1, 1000; ... gave errors: 1>..\\..\\..\\projects\\test\\xyz.cpp(1139) : error C2059: syntax error : '' 1>..\\..\\..\\projects\\test\\xyz.cpp(1139) : error C2143: syntax error : missing ';' before '' 1>..\\..\\..\\projects\\test\\xyz.cpp(1139) : error C2143: (...)
16:17
How to stack and sync 4 videos into one (in python) - Lucian Newest 'ffmpeg' Questions - Stack Overflow

I've got 4 videos of an event filmed from 4 different angles and I'd like to combine them into one 4-pane video, so that the event can be seen from the different angles simultaneously. I also have the time offset of each video, so that I can sync them, and only use the sound from the best recording. Is there a way to do this in python? As a fallback, a solution with ffmpeg could work as well.
16:06
Matplotlib can not save animation - Justin Furuness Newest 'ffmpeg' Questions - Stack Overflow

I have a matplotlib animation and it will not save. If I do not save it, it runs totally fine and without error. When I try to save it errors with a message that is not helpful. I have googled this error and checked everything, but I cannot seem to find an answer to this problem. I have installed ffmpeg. Am I doing something wrong that is obvious? I am running on ubuntu 19.10 with matplotlib 3.2.1 if that matters. The code to save the animation is below: def run_animation(self, total_rounds): anim = animation.FuncAnimation(self.fig, self.animate, (...)
15:26
How to use latest FFMPEG in Android Studio project? - arslan haktic Newest 'ffmpeg' Questions - Stack Overflow

I have a simple task to make a video from multiple images and an audio file, After searching a lot found that its possible with FFMPEG, Unfortunately there are no updated tutorials for FFMPEG, there are few but outdated and most of them are not working. As I have compiled FFMPEG for Android using NDK android-ndk-r10e and ffmpeg-2.8.6 on my MAC with Android Studio following the tutorial http://www.roman10.net/how-to-build-ffmpeg-with-ndk-r9/ It makes the .so files as Now I can't understand what should I do to integrate this in my Android project, I have also (...) -- http://www.roman10.net/how-to-build-ffmpeg-with-ndk-r9/, , http://www.roman10.net/how-to-build-android-applications-based-on-ffmpeg-by-an-example/, https://github.com/roman10/android-ffmpeg-tutorial
15:19
Error in avcodec_receive_packet (gdi screenshot + ffmpeg) - saqef Newest 'ffmpeg' Questions - Stack Overflow

I try to capture windows screen with ffmpeg. All's working, but avcodec_receive_packet return error AVERROR(EAGAIN) and I can't undestand why it's happenning. Can anybody give advice? SwsContext* convertContext = sws_getContext(c->width, c->height, AV_PIX_FMT_BGRA, c->width, c->height, c->pix_fmt, SWS_FAST_BILINEAR, NULL, NULL, NULL); for (int i = 0; i MakeScreenshoot(); OutFrame->pts = i; int ret = av_image_fill_arrays(GDIFrame->data, GDIFrame->linesize, gdi->m_bufferGDIBits, AV_PIX_FMT_BGRA, c->width, c->height, 1); ret (...)
14:25
Video created from JPEG images in Spring Boot using FFmpegBuilder is extremely resource demanding - Igor Avramovic Newest 'ffmpeg' Questions - Stack Overflow

I have created small JAVA app which transforms a set of input JPEG images into video For that purpose i use net.bramp.ffmpeg.builder.FFmpegBuilder FFmpegBuilder builder = new FFmpegBuilder() .addInput(imagesSourceFolder) .addOutput(videoOutputPath) .setFormat("mp4") .setVideoCodec("libx264") .setVideoResolution(1280, 720) .disableSubtitle() .disableAudio() .setVideoFrameRate(FFmpeg.FPS_24) .done(); Everything works just fine But the problem is that video created like this is (...)
13:53
Adjust volume of both input audio files while concat using ffmpeg - Mozhgan Javadzadeh Newest 'ffmpeg' Questions - Stack Overflow

I am using the following command to concatenate(append second wav to end of first wav) two audio files (input can be any audio: mp3,wav etc) into one output.mp3 , and it works fine: ffmpeg -y -i first.wav -i second.wav -filter_complex "[0:0][1:0]concat=n=2:v=0:a=1[out]" -map "[out]" output.mp3 but how can adjust volume for each of input audios separately so my output.mp3 will have two audio files with different volume that i set? for example i want my output contains volume 0.5 for first audio and volume 1 for second audio.be aware that i don't want mix two (...)
13:50
clang++: error: linker command failed with exit code 1 (use -v to see invocation) [duplicate] - Pradeep Simba Newest 'ffmpeg' Questions - Stack Overflow

When I build ndk with ffmpeg it occurs error. Android.mk file LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_C_INCLUDES += ./include LOCAL_MODULE := native-lib LOCAL_CFLAGS := -DSTDC_HEADERS -std=c99 LOCAL_CFLAGS := -Wno-pointer-sign LOCAL_ARM_MODE := arm APP_OPTIM := release LOCAL_SRC_FILES := \\ ./native-lib.cpp LOCAL_LDLIBS := -llog include $(BUILD_SHARED_LIBRARY) native-lib.cpp file #include #include extern "C" #include (...) -- ,
11:23
ffmpeg how to get rtsp stream via non-default route interface? - BloodMan Newest 'ffmpeg' Questions - Stack Overflow

I have a server with two IP adresses (two ISPs): 1.2.3.4 (ISP-1, default route) 5.6.7.8 (ISP-2, backup) How to get rtsp stream via ISP-2? OR how to bind ffmpeg to non default interface? BIND_ADDR="5.6.7.8" LD_PRELOAD=/usr/lib/bind.so ffmpeg -i ... does not work :( [tcp ⓐ 0x55c7b5906280] Starting connection attempt to x.x.x.x port 554 [tcp ⓐ 0x55c7b5906280] Connection attempt to x.x.x.x port 554 failed: No route to host [tcp ⓐ 0x55c7b5906280] Connection to tcp://x.x.x.x:554?timeout=0 failed: No route to host And no, there are no routing (...)
10:12
In FFmpeg, can -filter_complex do everything that -filter can? (i.e., is it a direct replacement) - Robert Salesas Newest 'ffmpeg' Questions - Stack Overflow

This may seem like a strange question but... is it possible to do everything -filter can do using only -filter_complex filters? That is, is there anything that -filter can do, that is not possible with -filter_complex?
06:51
Debugging FFmpeg - NadavRub Newest 'ffmpeg' Questions - Stack Overflow

I am using FFmpeg ⓐ Android and would like to be able to step-in to the FFmpeg code ( Eclipse + Seqouya ), while compiling FFmpeg I use the --disable-stripping --enable-debug=3 flags, still, stepping in with the debugger throws me at some unrelated line of code. What settings should I use to enable FFmpeg debugging ?
04:11
Is there any (or possible) html5 player that play videos on different resolution without convertion the media file? - In-my-country-we-dont-use-name Newest 'ffmpeg' Questions - Stack Overflow

I want to play videos on my website with a html5 media player.I found this for an example: https://plyr.io/ but it needs different videos for every resolution with these codes: I dont want convert media files with some convertion technologies for example ffMpeg, IF IT IS POSSIBLE.So, I want to learn how to play videos on different resolution without convertion.If you know a html5 player, you can suggest me. Its urgent.My company loses many thousand dollars everyday because of this problem.If we cant solve this, we (...) -- https://plyr.io/
01:18
How to combine photos and music into videos using ffmpeg? [closed] - john Mitrich Newest 'ffmpeg' Questions - Stack Overflow

There is a folder in which there are many pairs of files with the same names in two formats, namely mp3 and jpeg, I need an ffmpeg code that combines these pairs of files in the video with the same names as its parts and lasts as long as it lasts music. In words, everything is simple, but in fact, I have been suffering for 2 days, please help
00:02
Using python with ffmpeg to query video data from rtsp in complete frame - CDY Newest 'ffmpeg' Questions - Stack Overflow

Currently, I am trying to use python with ffmpeg to read video data from server. Here is my command: command = ["ffmpeg", "-c:v", "h264", "-rtsp_transport", "tcp", "-i", in_stream, "-c:v", "copy", "-an", "-sn", "-f", "avi", "-"] I will use this command to query data from server and put data into queue. One question is, every time the data I query from server which is not a complete frame. It is just a part of encoding data. If I want to get data as a complete frame. How can I change my command (...)

31 March

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

22:32
ffmpeg unable to find encoder 'libvorbis' - scientiffic Newest 'ffmpeg' Questions - Stack Overflow

I'm unable to transcode a video file to webm because my machine isn't able to find libvorbis. When I run the following command: ffmpeg -y -i /public/uploads/tmp/1382112521-11953-7661/webm_Untitled.mov -vcodec libvpx -acodec libvorbis -s 640x360 -b 1500k -ab 160000 -f webm -g 30 -aspect 1.7777777777777777 /public/uploads/tmp/1382112521-11953-7661/tmpfile.webm I get the error Unknown encoder 'libvorbis' I already have libvorbis installed on my machine, though (When I try "brew install libvorbis, it tells me: Warning: (...)
21:13
ffmpeg video of image list within a folder - Gergely Szarka Newest 'ffmpeg' Questions - Stack Overflow

I am trying to create an animation from a png files. They are all in the same folder and are named step0.png step1.png step2.png ..... step19998.png step19999.png I frame represents 0.01s, so I think I need 100 fps. the command I was trying: ffmpeg -r 100 -f image2 -pattern_type glob -i '*.png' -vcodec libx264 -crf 1 -pix_fmt yuv420p test.mp4 For some reason it doesnt put them together in the correct order, but when i put the last 500 into another folder and ran the command there it worked (...)
20:09
How to save AVPacket if I have input information from online camera - Orest Newest 'ffmpeg' Questions - Stack Overflow

I am new to libav. I have a online video camera and want save video from archive to the video file with libav Camera provides such data uint32_t frameType, // I frame or P frame void *frame, //pointer to the frame size_t frameSize, //size of the frame in bytes uint64_t timeStamp, //time stamp in time_t units uint32_t width, //frame width uint32_t height, //frame heigh uint32_t genTime, //I do not now what is this. allways 0 const char *encodingType //H264 or H265 I tried this void (...)
19:57
Issues with file created using FFMPEG - amateur Newest 'ffmpeg' Questions - Stack Overflow

I am a newbie to ffmpeg but currently using it Powershell to cut video clips from an mp4 file. What I am looking to do is cut a segment from a video and create a new mp4 file with such. I run the following command, see following example for one clip created. Run this multiple times with different start times and duration's through out the source file: -ss 00:02:42.9060000 -i "C:\\Users\\User\\Desktop\\MySourceVideo.mp4" -t 00:00:07.2800000 -c:v copy "C:\\Users\\User\\Desktop\\MyClip.mp4" -y -v quiet Source file is mp4, with H264 video codec, AAC video codec. (...)
19:49
Rails video upload and convert into gif [closed] - Summer Newest 'ffmpeg' Questions - Stack Overflow

Can anyone tell me how to convert video into gif for first 5 seconds in rails 6 ....I have uploaded a video using careerwave gem but stuck in converting this in gif on server.
19:43
Frame size difference before and after creating a video - tkhan Newest 'ffmpeg' Questions - Stack Overflow

I am creating a video from images using Opencv. dim=(width, height) fourcc = cv2.VideoWriter_fourcc(*'X264') out_d = cv2.VideoWriter(save_path_depth,fourcc, fps, dim) After creating video I read video and extract frames from that video while(cap.isOpened()): ret, frame = cap.read() if ret == False: break print(frame) cv2.imwrite(output+"/"+ str(i).zfill(1) + ".png", frame) i+=1 cap.release() Frame size is almost double than size of frame i initially used to (...)
19:15
Alsa cannot set sample format[FFMPEG] - caiomcg Newest 'ffmpeg' Questions - Stack Overflow

I am trying to capture a pcm stream from a Roland USB device with ffmpeg and wrap it with wav. The command line I am using is the following: ffmpeg -f alsa -acodec pcm_s32le -ac 2 -ar 48000 -i hw:2,0 out.wav Which comply with the settings of the hardware. I can also capture the stream with Audacity. The problem is that FFMPEG throws "cannot set sample format error". Any idea of what may be happening and how I can fix this? Thanks in advance. FFMPEG OUTPUT userⓐuser:~$ ffmpeg -f alsa -acodec pcm_s32le -ac 2 -ar 48000 -i hw:2,0 (...)
19:07
Use ffmpeg to add multiple subtitles separately to a video - Appa Newest 'ffmpeg' Questions - Stack Overflow

I am trying to add multiple languages of subtitles to a video using ffmpeg. I succeeded in adding 1 language, but can't seem to add a second one. I use this simple script to add english subtitles to my video. ffmpeg -i %1 -i subs_eng.srt -map 0 -vcodec copy -acodec copy -scodec subrip -metadata:s:s:0 language=English "%~n1"_eng.mkv In addition, I run another script to add the Dutch subtitles. ffmpeg -i %1 -i subs_nl.srt -map 0? -vcodec copy -acodec copy -scodec subrip -metadata:s:s:1 language=Dutch "%~n1"_nl.mkv But whenever I add (...)
18:43
FFMPEG recording in ASP.NET Core mvc application - Timber Newest 'ffmpeg' Questions - Stack Overflow

I'm using ASP.NET Core and ffmpeg to record a live video stream. When the page receives a get request, the stream should begin recording and saving to a folder using ffmpeg. I want to make it so that when visiting the stop endpoint, the ffmpeg process is closed cleanly. Unfortunately I'm unable to send a 'q' to stdin after leaving the Get method. Using taskkill requires the use of /F making the ffmpeg process (which is not a window) force quit and not save the video properly, resulting in a corrupt file. I tried using Process.Kill() but that results in a corrupt file as well. Also, I (...)
18:42
Convert all files in a directory using ffmpeg and then move them using PowerShell - timlwsk Newest 'ffmpeg' Questions - Stack Overflow

I want to create a script that converts .mkv-files from x264 to x265 using ffmpeg-windows. To generate a list of all files in the directory I created a .ps1-script generate-list.ps1, you might want to use it. What must my powershell script be to execute the code stated below for each item in the folder video_old and move it to video_new after conversion? del .\\list.txt cd .\\video_old\\ foreach ($i in Get-ChildItem .\\*.mkv) echo "file '$i'" >> "list.txt" move .\\list.txt ..\\ cd .. The directory looks like this: Application-folder └ video_new └ *the converted files should go here* └ video_old (...) -- ffmpeg-windows
17:40
Different results using qt-faststart and "ffmpeg -movflags +faststart" - Juan Ignacio Sánchez Newest 'ffmpeg' Questions - Stack Overflow

I have a set of videos generated by security cameras, which have the MOOV atom at the end of the file, like this: ftyp (32 bytes) free (8 bytes) mdat (29647845 bytes) moov (42054 bytes) I want to serve these files using progressive downloads (pseudo streaming) and it's the only acceptable way to do it. Knowing that I tried to use tools like qt-faststart or directly ffmpeg with the corresponding flags (-movflags +faststart). Other detail is that I'm running this on a low profile machine, and FFmpeg takes like 6~8 seconds to finish (even using -c copy) and the other tool results to be (...)
17:31
Can OpenCV VideoWriter support to write frames into RTSP? - Bahramdun Adil Newest 'ffmpeg' Questions - Stack Overflow

I am using OpenCV with IP camera, which I can successfully read the video stream by using RTSP protocol, something like this: VideoCapture capture = new VideoCapture(); String url = "rtsp://admin:123456ⓐ192.168.10.3:554/Streaming/Channels/101?transportmode=unicast"; capture.open(url); But now I want in the same way create a writer with VideoWriter and write the frame to the output stream. Is this possible? If yes, then how? How to create a file name for the stream and how to get the stream on the other side, the same from IP camera to OpenCV? open(String filename, int fourcc, double (...)
16:35
FFMPEG joining multiple videos in grid - Adam Gosztolai Newest 'ffmpeg' Questions - Stack Overflow

I am trying to join a series of videos in a grid. Here is a command I used for 3 videos. ffmpeg -y -i /mnt/labserver/vid1.mp4 -i /mnt/labserver/vid2.mp4 -i /mnt/labserver/vid3.mp4 -filter_complex "color=s=360x360:c=Black [nbase];[0:v]setpts=PTS-STARTPTS,scale=180x180[b0];[1:v]setpts=PTS-STARTPTS,scale=180x180[b1];[nbase][b0]overlay=shortest=1:x=0:y=180[temp0];[temp0][b1]overlay=repeatlast=1:x=0:y=360[temp1];[temp1][b2]overlay=repeatlast=1:x=0:y=540[temp2]" -c:v libx264 -pix_fmt yuv420p /mnt/labserver/videos_joined.mp4 I get the following error Invalid stream specifier: b2 As far as I (...)
16:22
How to save ffmpeg output.mp4 to file - Interestedbutnotknowing Newest 'ffmpeg' Questions - Stack Overflow

I have a very basic question. I combined an .wav and .mp4 file to output.mp4 using ffmpeg in python: !ffmpeg -i /content/input.mp4 -i audio.wav -c:v copy -c:a copy output.mp4 Now how do I save the output.mp4 to an .mp4 file on my computer? Thank you very much in advance
13:49
deep data is not implemented FFmpeg - K4341 Newest 'ffmpeg' Questions - Stack Overflow

I have a question about FFmpeg when I'm trying to convert Deep Compositing "EXR" files sequence to "MOV" video file , I've got this : [exr ⓐ 00000294dd99f100] deep data is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented. [exr ⓐ 00000294dd99f100] deep data is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented. [image2 ⓐ 00000294dd99d1c0] decoding for (...)
13:31
Properly handling FFMpeg multithreading - Salvo Passaro Newest 'ffmpeg' Questions - Stack Overflow

I'm writing a program that receives multiple RTSP live streams and transmuxes them into various formats. My first idea was to spawn a thread for each stream to handle receiving, demuxing and remuxing; then i realized it was conceptually better to instead spread the work across "workers". So i eventually ended up building a std::queue (and an associated mutex) of AVPackets for each stream a semaphore based on std::condition_variable a worker to handle network io (which essentially loops over av_read_frame and notifies the semaphore on each successful iteration) a worker to "consume" (...)
12:12
In fluent-ffmpeg, how do you include multiple video filters? - wongz Newest 'ffmpeg' Questions - Stack Overflow

The code below adds the watermark but ignores the scaling. How do you include multiple video filters in fluent-ffmpeg? ffmpeg(inputFileName) .inputOptions(['-safe 0', '-f concat']) .outputOptions([ '-filter:v scale=w=1280:h=720', "-filter:v drawtext=text='watermarkText':x=W-150:y=H-th-10:fontsize=32:fontcolor=white", '-crf 10' ]) .save('output.mp4'); I tried these formats as well inside .outputOptions([]) to no avail: '-filter:v , ' '-filter:v ; ' '-filter:v', '', (...)
06:47
When i build ffmpeg with ubuntu this warning occurs "Function is deprecated [-Wdeprecated-declarations]" - Pradeep Simba Newest 'ffmpeg' Questions - Stack Overflow

I download the latest version of ffmpeg. when I build with my ndk toolchain it generate .so and include folder. But , this warning occurs ; How can I solve this? -- ffmpeg.,
05:06
Change audio speed using ffmpeg node js - Getwrong Newest 'ffmpeg' Questions - Stack Overflow

how do i change the speed of the song output using this function: function addAudio() console.log("adding audio..."); ffmpeg() .videoCodec('libx264') .format('mp4') .outputFormat('mp4') .input(song) .input(video) .output(output1) .on('end', () => resolve(output1); ).on('error', (_err) => reject(_err); ).run(); https://trac.ffmpeg.org/wiki/How%20to%20speed%20up%20/%20slow%20down%20a%20video this shows command line input but not sure how to use it in js (...) -- https://trac.ffmpeg.org/wiki/How%20to%20speed%20up%20/%20slow%20down%20a%20video
04:26
Scaling nginx-rtmp livestreaming with ffmpeg transcoding - hoodsy Newest 'ffmpeg' Questions - Stack Overflow

I currently have a functional livestreaming setup using the prolific nginx-rtmp library, and I'm using ffmpeg to provide various resolutions of my stream. The only problem is, ffmpeg with only 2 outputs eats up ~50% of my CPU. I'd like to be able to support up to 20 streamers at once – with the current demand, that would mean I need 10x the CPU power that I currently have! How can I scale my transcoding setup with nginx-rtmp and ffmpeg? rtmp server listen 1935; application src live on; exec_push ffmpeg -i rtmp://localhost/src/$name -c:v copy -preset:v ultrafast -b:v 512K -c:a copy (...)
01:46
ffmpeg critical noise occured after silence remove filtering - SY KIM Newest 'ffmpeg' Questions - Stack Overflow

I've tried to remove silence duration in my audio file. and it seems like working well.. but some problem rose up like the picutre i attached. ffmpeg -i "D://mono_test/silenceremove_test_raw.mp3" -filter:a silenceremove=1:0:-66dB -b:a 192k "D://mono_test/silenceremove_test.mp3" after silence remove filtering(in ffmpeg), some noise occured like picture(just left channel in the file). already control all parameters about silenceremove method, but the problem doesn't disappear. any Ideas? please help me.. thnx. enter image description here add full ffmpeg log here ffmpeg version (...) -- enter image description here, https://drive.google.com/open?id=1r-V-xesdO8pQ9_HGMweBUm6b0QRxwql2
00:08
Trouble accessing ffmpeg in python script - LucS Newest 'ffmpeg' Questions - Stack Overflow

I have trouble using ffmpeg. I looked to other topics which had the same problems as me, but unfortunately, I did not find solutions that helped my case. My OS is Windows 10 and I use Python 3.7 on a Jupyter Notebook when trying to access ffmpeg. When trying to create manually a writer manually, I can not seem to access ffmpeg. The line Writer = writers[rcParams['animation.writer']] raises me the error RuntimeError: Movie writer (ffmpeg) is not available. This disturbs me quite much because I can access to ffmpeg through a prompt cmd after I changed the Path environment variable to (...) -- https://www.wikihow.com/Install-FFmpeg-on-Windows

30 March

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

23:02
Singler line FFMPEG cmd to Merge Video /Audio and retain both audios - Deepak Prakash Newest 'ffmpeg' Questions - Stack Overflow

I have a project that requires merging of a video file with another audio file. The expected out put is an video file that will have both the audio from actual video and the merged audio file. The length of the output video file will be same to the size of the actual video file. Is there a single line FFMPEG command to achieve this using copy and -map parameters ? The video form I will be using is either flv or mp4 And the audio file format will be (...)
22:55
metadata duration not available on ffprobe when an audio stream is given - Saccarab Newest 'ffmpeg' Questions - Stack Overflow

I am able to get audio duration from metadata using fluent FFmpeg as below. const command = ffmpeg(`$audioPath\\$audioId.mp3`); command.ffprobe((err, data) => console.log('metadata:'); console.log(data.format.duration); ); However, if I try to access the same metadata using an input stream to same file, I will still get the metadata file but the duration will be listed as 'N/A' This is only the case for audio files, and I am able to get duration from a video input stream. Is there a way to get duration from an audio stream or do I necessarily need to read the whole file locally before (...)
21:54
Why am I getting FFMPEG "cannot set sample format 0x10000 2 (Invalid argument)" error? [duplicate] - Embedded Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to stream audio input from Seeed Studio 4-Mic-Array Respeaker on desired IP address and port on Raspberry Pi 4. Command that I'm using is: ffmpeg -re -f alsa -i hw:1,0 -ac 4 -ar 16000 -f rtp rtp://10.0.0.1:1234 Error I'm getting is: cannot set sample format 0x10000 2 (Invalid argument) Result from arecord --dump-hw-params -D hw:1,0 command is: Recording WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono HW Params of device "hw:1,0": -------------------- ACCESS: MMAP_INTERLEAVED RW_INTERLEAVED FORMAT: S32_LE SUBFORMAT: STD SAMPLE_BITS: 32 FRAME_BITS: 128 CHANNELS: 4 RATE: (...)
21:49
Streaming a WebPage to YouTube using FFMpeg - Pedro Lobito Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to stream a webpage to YouTube using phantomjs and ffmpeg. Long question short: This works. The video is saved to test.flv: phantomjs runner.js|ffmpeg -y -f image2pipe -r 10 -s 1280x720 -i - -deinterlace -vcodec libx264 -pix_fmt yuv420p -preset ultrafast -r 10 -g 20 -vb 400k -maxrate 400k -minrate 400k -bufsize 800k -threads 6 -q:v 0 -t 10 -f flv test.flv This doesn't. Despite no errors, nothing is streamed to YouTube. phantomjs runner.js|ffmpeg -f image2pipe -r 10 -s 1280x720 -i - -deinterlace -vcodec libx264 -pix_fmt yuv420p -preset ultrafast -r 10 -g 2 -vb 400k -maxrate (...) -- test.flv, runner.js
21:24
Trying to use the arcade library on Python3 with Debian 10 errors with pyglet_ffmpeg - Colin Newest 'ffmpeg' Questions - Stack Overflow

I've been trying to use the arcade library this morning with python3 but keep getting nothing but errors. My environment is Debian 10 (buster) I checked first to ensure I have python 3 installed, this confirmed as Python 3.7.3 I double checked (according to the arcade library website arcade linux installation instructions and ran the install for python3 to make sure that pip and the required libraries were installed. I then ran the command to install the library sudo pip3 install arcade And to test it, copied and pasted the happy_face.py example. However when I tried to run it I got (...) -- arcade linux installation instructions
19:44
adding silent audio in ffmpeg - jon Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to use ffmpeg to add a silent audio track to a MOV file. I created a silent audio track longer than the video, and intend to use the -shortest option with ffmpeg. Using SoX v14.3.1, I run this to generate a wav file: sox -n -r 44100 -b 16 -c 2 -L silence.wav trim 0.0 60.000 # -n = Sox's null file # -r = sample rate # -b = bits per sample # -c = num of channels # -L = little endian # filename # trim - is an effect, args start and length. My basic ffmpeg command looks like (...)
16:31
Why won't this encrypted HLS video play on iOS (but works on Windows Chrome via hls.js library)? - Ryan Newest 'ffmpeg' Questions - Stack Overflow

The original video is "Sample Video 5" from https://www.appsloveworld.com/download-sample-mp4-video-mp4-test-videos/. My /home/vagrant/Code/example/public/hls_hls.keyInfo is: https://example.com/hls.key /home/vagrant/Code/example/public/hls_hls.key 467216aae8a26fb699080812628031955e304a66e9e4480f9b70d31d8fe94e9a My /home/vagrant/Code/example/public/hls_hls.key was generated using PHP: hex2bin('467216aae8a26fb699080812628031955e304a66e9e4480f9b70d31d8fe94e9a') The ffmpeg command for encrypting the video as HLS playlist with "ts" (...) -- https://www.appsloveworld.com/download-sample-mp4-video-mp4-test-videos/, ffmpeg, https://caniuse.com/#search=hls, https://github.com/video-dev/hls.js/
16:01
FFMPEG : Invalid data found when processing input - Schüler Newest 'ffmpeg' Questions - Stack Overflow

I am unable to upload mp3 or mp4 is there any specific path format? Here is my code. I have tried this also ffmpeg -i Video/" + Name + " -ss 01:30 -r 1 -an -vframes 1 -f mjpeg Video/" + Name + ".jpg exec("ffmpeg -y -i Video/" + Name + " -map_metadata -1 -ab 192k Video/" + Name + ".jpg", function(err) if (err) console.log(err) console.log('Done', 'Image' : 'Video/' + Name + '.jpg'); ); Here is the error Error: Command failed: ffmpeg -y -i (...)
13:38
Trouble with ffmpeg on mac os catalina 10.15.3 - Scuds Newest 'ffmpeg' Questions - Stack Overflow

I had ffmpeg installed before upgrading my os to catalina. When I tried to re-encode a video it complained with this message dyld: Library not loaded: /usr/local/opt/openssl/lib/libssl.1.0.0.dylib Referenced from: /usr/local/bin/ffmpeg Reason: image not found zsh: abort ffmpeg I found out openssl isn't used in catalina in favor for libressl.. I did a brew search openssl and found I have opensslⓐ1.1 not 1.0.0 I'm weary about messing around with the version of openssl because so many other programs depend on it and I don't (...)
12:48
Build with ffmpeg : make: *** No rule to make target 'jni/../third_party/lame/libmp3lame/VbrTag.c', needed al/arm64-v8a/objs/lame/VbrTag.o'. Stop - Pradeep Simba Newest 'ffmpeg' Questions - Stack Overflow

my jni folder Android.mk file lame folder when I build ndk it comes like this. After, I added the lame in third_party/lame there was 16 warnings and 2 errors generated. How can I solve this? -- jni folder, , Android.mk file, , , , ,
12:02
How to stream video in the GUI using PyQt5? - Shriya Newest 'ffmpeg' Questions - Stack Overflow

I am a newbie with Python as well as ffmpeg. Once the webcam is assigned to the Pine, the video gets stored in the /mnt/hls directory. The video from this directory needs to be displayed on the Front End which was designed using QtDesigner and the wiring is done using PyQt5. The video needs to be displayed when a button is clicked by the user in the OpenGLWidget. The command line for the video stream is "Ffplay -fflags nobuffer -flags low_delay [HLS playlist]", which can be run using os.system(). My issue is with getting the video displayed in the OpenGLWidget. Could someone help me (...)
10:04
'avcodec_encode_video' , 'avcodec_encode_audio' , 'av_new_stream' is deprecated [-Wdeprecated-declarations] in c with ffmpeg - Pradeep Simba Newest 'ffmpeg' Questions - Stack Overflow

'avcodec_encode_video' , 'avcodec_encode_audio' , 'av_new_stream' is deprecated [-Wdeprecated-declarations] in c with ffmpeg . when I build ndk with ffmpeg lib this warning occurs. my c file I already saw this Handling ffmpeg library interface change when upgrading ffmpeg . But, I did not know to implement this. How can I solve this? -- , c file
09:46
Video streamed from ffmpeg through Janus is sluttering - Nico G. Newest 'ffmpeg' Questions - Stack Overflow

I am trying to stream janus, but video is sluttering. My ffmpeg params is ['-i', '-', '-vcodec', 'copy', '-an','-f', 'rtp', 'rtp://127.0.0.1:5004?pkt_size=1200','-vn', '-acodec', 'copy', '-f', 'rtp', 'rtp://127.0.0.1:5002?pkt_size=1200'] (params in nodejs for restream socket packets). Thank (...)
09:43
I am getting this "Error: FFmpeg/avconv not found!" - Fhabbulous Newest 'ffmpeg' Questions - Stack Overflow

I am trying to create a discord bot, however receive this error every time I try to run a youtube link. Error: FFmpeg/avconv not found! at Function.getInfo (C:\\Users\\-\\discord-bot\\node_modules\\prism-media\\src\\core\\FFmpeg.js:130:11) at Function.create (C:\\Users\\-\\discord-bot\\node_modules\\prism-media\\src\\core\\FFmpeg.js:143:38) at new FFmpeg (C:\\Users\\-\\discord-bot\\node_modules\\prism-media\\src\\core\\FFmpeg.js:44:27) at AudioPlayer.playUnknown (C:\\Users\\-\\discord-bot\\node_modules\\discord.js\\src\\client\\voice\\player\\BasePlayer.js:47:20) at VoiceConnection.play (...)
08:29
avformat with custom IO - threadsafe? - Daniel Newest 'ffmpeg' Questions - Stack Overflow

Consider the following pseudo-code snippet: init avdevice_register_all avformat_network_init thread // open input av_find_input_format avformat_open_input avformat_find_stream_info // open output avformat_alloc_output_context2 avio_alloc_context(outputbuffer,size,1,extradata,0,&staticWrite,0) avformat_new_stream avcodec_parameters_copy avformat_write_header loop av_read_frame av_write_frame staticWrite // here comes data When I (...)
07:42
Join video in FFmpeg have problem More than 1000 frames duplicated - Bùi Minh Quang Newest 'ffmpeg' Questions - Stack Overflow

Hello I have this FFMPEG code ffmpeg -i video1.mp4 -i video2.mp4 -i video3.mp4 -filter_complex "[0:v]scale=1280x720,setsar=1[v0]; [1:v]scale=1280x720,setsar=1[v1]; [2:v]scale=1280x720,setsar=1[v2]; [v0][0:a][v1][1:a][v2][2:a]concat=n=3:v=1:a=1" output.mp4 But I exec it it give back me this Warring Message: More than 1000 frames duplicated How can I solve it? Plesase help me. Thanks!
03:19
Pyinstaller "Failed to execute script pyi_rth_pkgres" and missing packages - gurnben Newest 'ffmpeg' Questions - Stack Overflow

This is my first time posting a question here as most of my questions have already been answered by someone else! I am working on a GUI application in python and am attempting to use pyinstaller to package it into a single folder and .exe for easier portability. Currently, I am using windows 10 and anaconda3 to manage my python packages. The application relies on tkinter, pillow, numpy, scikit-learn, opencv, ffmpeg, and matplotlib. The application is formatted with a main GUI.py file that creates objects of a number of other files (many of which are stored in a subfolder as this GUI is (...)
03:48
When installing ffmpeg was it meant to be installed in my computer, xampp server or php am confuse - Fuse Gamer Newest 'ffmpeg' Questions - Stack Overflow

I want my website to be able to display one or more thumbnails gotten from a video, but I can't seem to get anywhere. I have installed ffmpeg on my computer using command line, please help am just confuse. If there is anyway please help me even if it is to start over.

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6 April

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5 April

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4 April

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1 April

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31 March

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

30 March

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg