21 February

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

• 02:29
  Discord.js "Error: FFMPEG not found" but I'm pretty sure I have it - Cole Perry Newest 'ffmpeg' Questions - Stack Overflow
  I'm learning Discord.js and following this tutorial: https://discord.js.org/#/docs/main/stable/topics/voice . From the start, when I try to run- npm install ffmpeg-binaries I get a huge error message but it tells me to just use install ffmpeg so I did. Here is my Index.js page(I've replaced my token with * here): const Discord = require('discord.js'); const Colesbot = new Discord.Client(); const token = '**********************************'; Colesbot.on('ready', () => console.log('Slamsbot is online.'); ) Colesbot.on('message', msg=> if(msg.content == "What up bot?") msg.reply("Whats good (...) -- https://discord.js.org/#/docs/main/stable/topics/voice
• 02:25
  Trying to read streaming video using OpenCVSharp4 - AlvinfromDiaspar Newest 'ffmpeg' Questions - Stack Overflow
  I'm just not having any luck whatsoever with this. I'm calling OpenCvSharp.VideoCapture("udp://0.0.0.0:11111") to try to read a video stream. This does not work, and the documentation seems like it doesnt support streaming. I've also tried (without success) trying to grab images using OpenCvSharp, but i've no idea how to do that. Documentation for it doesn't show any indication this is possible as well. The snippet for this is here: var vc = new OpenCvSharp.VideoCapture("udp://0.0.0.0:11111"); if (!vc.IsOpened()) vc.Open("udp://0.0.0.0:11111"); while (true) var matImage = new (...)
• 00:36
  How can I broadcast a Twilio (group room) video conference? - Danish Newest 'ffmpeg' Questions - Stack Overflow
  I have been trying different solutions/approaches for last few days and posting here to get some more options. I am planning to use Twilio's Programmable Video solution with Group room (upto 50 participants) to allow hosts/presenters to join video conference meeting. Right now I am able to setup and get started with quickstart example here Also, in parallel, I need to be able to broadcast that live meeting room through RTMP/HLS (audio+video) streaming that can be viewed (through another portal) by large user set (ideally around 10k+) Twilio support team suggested - integrating Twilio (...) -- with quickstart example here, from wowza or SIP, a blog here, Wowza WebRTC streaming, simple as here

20 February

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

• 22:36
  Error in building opencv with ffmpeg - batuman Newest 'ffmpeg' Questions - Stack Overflow
  I installed ffmpeg according to this article. ffmpeg installation was ok. Now I build opencv with ffmpeg support and I have some errors. The errors are /home/coie/Softwares/Libraries/opencv-2.4.13.3/modules/highgui/src/cap_ffmpeg_impl.hpp:1484:21: error: ‘CODEC_FLAG_GLOBAL_HEADER’ was not declared in this scope c->flags |= CODEC_FLAG_GLOBAL_HEADER; ^ /home/coie/Softwares/Libraries/opencv-2.4.13.3/modules/highgui/src/cap_ffmpeg_impl.hpp: In function ‘int icv_av_write_frame_FFMPEG(AVFormatContext*, AVStream*, uint8_t*, uint32_t, AVFrame*)’: (...) -- article
• 20:56
  FFmpeg convert mp3 to pcm error "could not find codec parameters" - Hanqing Wu Newest 'ffmpeg' Questions - Stack Overflow
  When I am trying to convert a mp3 file to pcm using the following code, I repeatedly get the error message [mp3 ⓐ 0x22cc420] Format mp3 detected only with low score of 1, misdetection possible! [mp3 ⓐ 0x22cd260] Header missing [mp3 ⓐ 0x22cc420] decoding for stream 0 failed [mp3 ⓐ 0x22cc420] Could not find codec parameters for stream 0 (Audio: mp3, 0 channels, s16p): unspecified frame size Consider increasing the value for the 'analyzeduration' and 'probesize' options test.mp3: could not find codec parameters Input #0, mp3, from 'test.mp3': Duration: N/A, start: 0.000000, bitrate: N/A (...)
• 22:44
  Trim .wav file combining sox, ffmpeg in a windows batch script - pbc278 Newest 'ffmpeg' Questions - Stack Overflow
  I need to trim 300 .wav files to be a specific sample-length (x times 1152 samples) So if a .wav file is 1727821 samples in length (sox --i -s xx.wav) = 1727821. I need to divide the outcome of the sox command by 1152 (1727821/1152 = 1499,844...) Then I need to use the outcome (1499 without decimals) and multiply it by 1152 (1499*1152=1726848) Then I need to trim the sample with ffmpeg to that outcome ffmpeg -i xx.wav -af atrim=end_sample=1726848 How do I do this in a batch file? in pseudo code something like FOR %%i IN (*.*) DO ( ⓐset sample_length = (sox --i -s %%~ni.wav) ⓐset (...)
• 20:42
  Continuously play the gif on image using FFmpeg - Shweta Patil Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to place multiple gif on image and save as gif using FFmpeg. I had achieved placing of multiple gif but all gif doesnot play continuously i.e Second gif repeat only once first gif finish and started again ..the second gif stop and start again only when first gif finishes. command_try[0]="-i"; command_try[1]=input; command_try[2]="-i"; command_try[3]=gifthumbnail; command_try[4]="-i"; command_try[5]=gifthumbnail; command_try[6]="-i"; command_try[7]=thumbnail; command_try[8]="-i"; command_try[9]=thumbnail2; command_try[10]="-filter_complex"; (...)
• 20:33
  FFmpeg seeking (-ss) not working on some devices - ClassA Newest 'ffmpeg' Questions - Stack Overflow
  As the title states, -ss command is not working on some devices, like the Huawei Mate 10. Here is the command I'm using and how I get the values: Format formatter = new SimpleDateFormat("00:" + "mm:ss.SS"); // Video duration long duration = getDuration(); // Video duration devided by 6 (I want to get 5 images) long img1 = duration / 6; String firstThumbTime = formatter.format(img1); // Screen dimentions devided by 7 String dimentions = width + ":" + height; String[] a = "-ss", firstThumbTime, "-i", mStringFilePath, "-vframes", "1", "-s", dimentions, imageThumbsDirectory + "/" + (...)
• 20:12
  ffmpeg: concatenating mp4 files. Video freezes for few seconds on first frame on output mp4 - suste88 Newest 'ffmpeg' Questions - Stack Overflow
  I created several MP4 files using ffmpeg. All of the videos have same settings and codec. Only difference is frames per second and duration. I then concatenated the videos using command below. ffmpeg -f concat myList.txt -c copy output.mp4 I notice that when launching/opening the output.mp4 file in windows media player, it stops/freezes on the first frame of the video for about three four seconds and then starts playing, rest of the videos has correct fps and runs smoothly. Has anyone encountered this issue. I would like the video to start as soon as it is launched. Any suggestions to (...)
• 19:51
  How to livestream a webcam to YouTube with FFmpeg? - pkok Newest 'ffmpeg' Questions - Stack Overflow
  I want to send the livestream of my webcam to YouTube. I can follow YouTube's guide up to step 8. "Stream Connection" tells me there is "No data" and the button "Go Live" remains unclickable. A screenshot of this situation can be seen at As encoding software, I was planning on using FFmpeg because it can run from the target platform, a Raspberry Pi with Raspbian. A USB webcam supported by video4linux2 is used. FFmpeg's wiki shows that streaming a file can be done with the following: ffmpeg -re -i input.mkv \\ -c:v libx264 -preset veryfast -maxrate 3000k \\ -bufsize 6000k -pix_fmt (...) -- YouTube\'s guide, FFmpeg\'s wiki
• 19:47
  Fastest way to add -movflags +faststart to an MP4 using FFMPEG, leaving everything else as-is - Jonas Kaufmann Newest 'ffmpeg' Questions - Stack Overflow
  I want to add -movflags +faststart to an mp4 file. Basically that is all I want to do, nothing else should be changed. I am usinf ffmpeg. What's the fastest way to do this? Do I have to re-encode the whole video? Or is there a better/easier way?
• 16:43
  h264 to mp4 using libavformat: howto do correctly? [duplicate] - Daniel Newest 'ffmpeg' Questions - Stack Overflow
  I want to convert an h264 live stream to mp4 live stream (no files are used). I would like to use avformat to produce the same output as this command: ffmpeg -i CAMERARTSPLINK -c:v copy -an -movflags +frag_keyframe+empty_moov -f mp4 pipe:1 pipe:1 means it will write to stdout where seek is not available. (i.e. ffmpeg is not able to change anything that it has wrote before) Here is my sample code using avformat. I created a wrapper class for the ffmpeg to store it's output to file (with this method I still ensure that ffmpeg is not able to modify anything). Also I modified my sample (...) -- Here, Here, Here
• 18:35
  The start timestamp is non zero-when remuxing using libavformat - animaonline Newest 'ffmpeg' Questions - Stack Overflow
  I'm remuxing a live rtmp stream using libavformat's sample remuxing.c my code is almost identical to that sample, but it also decodes the audio and video in order to render a preview using SDL, that works great. My application has a a button to start recording, and whenever the user presses it, the main loop will remux to a file, in a typical situation a user will wait a couple of seconds before initiating a recording, that is where the problems arise, the resulting video has non-zero start time. (I don't see these problems if I manually initiate the recording right after opening the (...) -- remuxing.c
• 18:24
  FFMPEG rtsp stream add timestamp to output file - kernel252 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying add timestamp to output file from FFMPEG but I'm getting this error. Filtergraph 'drawtext=fontfile=/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Bold.ttf:text='\\%T': fontcolor=whiteⓐ0.8: x=7: y=460' was defined for video output stream 0:0 but codec copy was selected. Filtering and streamcopy cannot be used together And my command is: ffmpeg -i rtsp://admin:passwordⓐ192.168.1.52:554/11 -vf "drawtext=fontfile=/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Bold.ttf:text='\\%T': fontcolor=whiteⓐ0.8: x=7: y=460" -acodec copy -vcodec copy test.avi And the output: ffmpeg (...)
• 18:12
  How do I set AudioStreamBasicDescription properties for mp3 after decoded by FFmpeg - Tony.Lee Newest 'ffmpeg' Questions - Stack Overflow
  I have already decoded the mp3 file with FFmpeg and try to play it with AudioQueue. If I set the ASBD structure like this: AudioStreamBasicDescription audioFormat = .mSampleRate = 44100, .mFormatID = kAudioFormatLinearPCM, .mChannelsPerFrame = 2, .mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked, .mBitsPerChannel = 16, .mBytesPerPacket = 4, .mBytesPerFrame = 4, .mFramesPerPacket = 1, ; The audio can be play but it sounds strange and a little bit noisy. If I play the mp3 file with AudioQueue directly, the ASBD is shown below: AudioStreamBasicDescription (...)
• 17:16
  Loss voice while re stream with ffmpeg - mehregan Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to receive Stream from a VLC and send it to an HLS server. But some times (Ex, After one day or some hours) i have No Voice on HLS Server. this is the command i use: ffmpeg -nostdin -i rtsp://127.0.0.1:8554/ -vb 600k -maxrate 600k -aspect "852:480" -s "852x480" -c:v libx264 -profile:v "Main" -level "3.1" -preset veryfast -r 30 -keyint_min 50 -x264opts "keyint=50:min-keyint=50:no-scenecut" -c:a copy -f flv rtmp:/HLSSERVER/live2/ According to This i Added -analyzeduration 1G -probesize 50 But it didnt solve my (...)
• 16:55
  Why does javaFx run converted mp4 but not original? - brat Newest 'ffmpeg' Questions - Stack Overflow
  Simply put, I have this issue where I have a mp4 file with a video. If I run it directly in the code posted here, the window opens but its white/blank. No movie showing. But if I run the original movie through ffmpeg it works. ffmpeg -i original.mp4 -s hd720 converted.mp4 Note that Im converting from mp4 to mp4, I just change the size to hd720. So, the question is, why do I need to do that? My code: package mypack; import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.layout.BorderPane; import javafx.scene.media.Media; import (...)
• 16:44
  avformat code produce slightly different output than ffmpeg with same parameters - why? - Daniel Newest 'ffmpeg' Questions - Stack Overflow
  I would like to achieve the exact same result as this ffmpeg command line call does from code: ffmpeg -i CAMERARTSPLINK -c:v copy -an -movflags +frag_keyframe+empty_moov -f mp4 When I run the above command it gives this binary result: got 36 bytes: 0, 0, 0, 36, 102, 116, 121, 112, ..., 111, 54, 109, 112, 52, 49, got 512 bytes: 0, 0, 3, 76, 109, 111, 111, 118, 0, 0, 0, ..., 132, 0, 0, 3, 0, 4, 0, 0, 3, 0, 202, The code can utilize ffmpeg libraries and includes, but I don't want to use ffmpeg as a program call (i.e. exec* functions are not preferred). I have created a small demonstration (...) -- videostreamer, sample code
• 15:11
  nginx ffmpeg mpegts http - michel Newest 'ffmpeg' Questions - Stack Overflow
  i can't understand how to serve .ts files from nginx. for hls it works without problems (m3u8). http://127.0.0.1/hls/stream_name.m3u8 http://127.0.0.1/stream_name I tried to compile nginx with the 2 modules: nginx-live-module nginx-ts-module It works in part, if I send a stream it works, if I send for example 10 it doesn't work. ffmpeg -re -f concat -safe 0 -i stream.txt -c copy -map 0 -f mpegts "http://127.0.0.1/stream_name?buffer_size=1048576" with VLC I open the stream and it works but if I try to open more streams it doesn't open even if ffmpeg is sending to the nginx server. (...) -- http://127.0.0.1/hls/stream_name.m3u8, http://127.0.0.1/stream_name, http://127.0.0.1/stream_name?buffer_size=1048576
• 16:29
  How to stream video using youtube_dl into ffmpeg? - Eugene Levinson Newest 'ffmpeg' Questions - Stack Overflow
  I have the folowing code to play an mp3 file into disocrd: #joining user's voice channel vc = await join_auth(ctx) #playing music vc.play(discord.FFmpegPCMAudio('testing.mp3'), after=lambda e: print('done', e)) vc.is_playing() However I know that you can stream youtube videos using youtube_dl but I can't figure out how. Could you give me an example of how I would do it? Thanks! Here is the join_auth(ctx) function: async def join_auth(ctx): try: channel = ctx.author.voice.channel vc = await channel.connect() return vc except Exception as e: logg("Exception occured when joining a voice (...)
• 16:05
  How to execute ffmpeg from with Batch For Loop - John Pooley Newest 'ffmpeg' Questions - Stack Overflow
  FOR %%A IN (%*) DO ffmpeg -y -i %%A -c:v prores_ks -profile:v 3 -c:a pcm_s16le "%%~dpA%%~nA.mov" This batch file is intended to take multiple files which are dragged and dropped onto it, and transcode them with ffmpeg. The command results in a whole bunch of prinouts that are similar to the command, but it does not execute. I have also tried using start cmd.exe /c, but that causes numerous windows to open which necessitates a computer reboot. Edit: squashman has made it clear that this solution would not work anyway (Thanks!). However, I have edited the script to act on only a single (...)
• 15:47
  Converting MP3 files to WAV files using python - Eden Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert an mp3 file to a wav file using python. Im using IDLE 3.7.4. I have pydub and Ffmpeg installed. I believe I have installed everything correctly yet am unsure of why my file won't convert from mp3 to wav.. please help me input: from pydub import AudioSegment sound = AudioSegment.from_mp3("/Users/audio.mp3") sound.export("/Users/file.wav", format="wav") output: Warning (from warnings module): File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pydub/utils.py", line 165 warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may (...)
• 15:31
  getting ffmpeg to work with php website error 500 or access denied - user3725395 Newest 'ffmpeg' Questions - Stack Overflow
  I have two ways without success and different results, with exec method the ffmpeg actually works and creates the output file but then the website crashes with error 500. if I use the proc_open method then it runs and creates the log file atest.log in the output store folder, but ffmpeg errors at the end with: store\\audio_recording_1441120844021u.mp3: Permission denied and doesn't write the file out. ffmpeg has IUSR full control permissions and those permissions are also on the store folder. any ideas??? exec method:- $cmd = "ffmpeg.exe -i C:\\\\Windows\\\\Temp\\\\recordings\\\\".$filename." (...)
• 14:33
  pyglet_ffmpeg loads and plays video in script(.py) but not loading(media load) in executable - Mahesh Dilip Salvi Newest 'ffmpeg' Questions - Stack Overflow
  i am playing full screen video in pyglet application which just plays video as follows, the script(.py) file loads mp4 video and plays it well (windowed/fullscreen) but after making it executable with pyinstaller command (pyinstaller -w -F .\\videoPlay.py) it is not loading media. *i had identified it with 'try-except' block with help of ctypes.MessageBox Please assist me by checking following thing. import pyglet, pyglet_ffmpeg pyglet_ffmpeg.load_ffmpeg() vidPath = 'm2Vid.mp4' window = pyglet.window.Window() #fullscreen=True player = pyglet.media.Player() source = (...)
• 13:41
  How to run FFMPEG in laravel project - Jin Newest 'ffmpeg' Questions - Stack Overflow
  I can run this code via cmd. And my question is how can I run this command to my laravel project locally and also to my live server? ffmpeg -i input1.webm -i input2.webm output.mp3 Thanks in advance.
• 13:16
  ffmpeg stream videos from two cams have a same device name - junsang Newest 'ffmpeg' Questions - Stack Overflow
  There are two cameras have a same device name Microsoft® LifeCam Studio(TM). ffmpeg -list_deivces true -f dshow -i dummy prints the below output. C:\\Users\\user>ffmpeg -list_devices true -f dshow -i dummy ffmpeg version git-2020-02-05-e6891d1 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9.2.1 (GCC) 20200122 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb (...) -- ffmpeg dshow example
• 11:15
  How can I batch/sequentially download m3u8 files using ffmpeg? - Yesterdec Newest 'ffmpeg' Questions - Stack Overflow
  I'm currently downloading m38u playlists individually using the following on Mac: ffmpeg -i -codec copy output.ts If I want to do multiple files, I currently do it from separate Terminal windows. What I would like to do is, in a single instance, tell ffmpeg to e.g. take URLs from a .txt file and download them in sequence, with a sequential output name for each (fine for them to all go in same output folder). Sample code from m3u8 file: #EXTM3U #EXT-X-VERSION:3 #EXT-X-MEDIA-SEQUENCE:0 #EXT-X-ALLOW-CACHE:YES #EXT-X-TARGETDURATION:9 #EXTINF:8.333333, segment00000.ts #EXTINF:8.333333, (...)
• 10:45
  FFMpeg library: how to precisely seek in an audio file - matteoh Newest 'ffmpeg' Questions - Stack Overflow
  Using the FFMpeg library in my Android app, I try to understand how I can seek in an audio file, at a very precise position. For example, I want to set the current position in my file to the frame #1234567 (in a file encoded at 44100 Hz), which is equivalent to seek at 27994.717 milliseconds. To achieve that, here is what I tried: // this: av_seek_frame(formatContext, -1, 27994717, 0); // or this: av_seek_frame(formatContext, -1, 27994717, AVSEEK_FLAG_ANY); // or even this: avformat_seek_file(formatContext, -1, 27994617, 27994717, 27994817, 0); Using a position in microseconds gives me (...)
• 10:23
  Testing MPEG2 decoder stage by stage - Bhavesh Singhal Newest 'ffmpeg' Questions - Stack Overflow
  I am writing a video decoder for MPEG2 Transport Streams and looking for test data. More specifically, I want to be able to compare the output of my decoder versus a reference set of outputs at each stage of the decoding pipeline (Inverse Quantization, Inverse DCT, etc). Even if I can only compare 1 slice, that would be good enough.
• 09:33
  how can I let ffmpeg use cuda context created externally? - Wang Newest 'ffmpeg' Questions - Stack Overflow
  Some libraries for example the ffmpeg are using dynamically loaded one. But our project is linked to cuda driver directly. I would like to share the same context between them. I tried the naive way to do this: initialize and create cuda context via ffmpeg's av_hwdevice_ctx_create. then use cuCtxSetCurrent to set the obtained the context created by step one. This works fine. However, I want share the context in the other way around: create and manage the context in our code then share the context with ffmpeg. Is this (...)
• 08:26
  Create thumbnail file when cropping and converting in FFMPEG - BN83 Newest 'ffmpeg' Questions - Stack Overflow
  I'm currently using the following: ffmpeg -y -i input.mov -i watermark.png -filter_complex "[0:v]crop=iw-0:ih-440,scale=480:640[bg];[bg][1:v]overlay=W-w-10:H-h-10" output.mp4 To resize, crop and watermark a video, all is working perfectly, however I'd like to grab a screenshot midway through. I've tried adding: -qscale:v 2 thumbnail.jpg After the input.mov, however it then ruins the rest of the script. Bit of a noob to FFMpeg. EDIT: The following: ffmpeg -y -i input.mov -vframes 1 -q:v 2 thumbnail.jpg -i watermark.png -filter_complex (...)
• 07:08
  ffmpeg slide showing corrupted - devcrazy Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use ffmpeg to create a slide showing video from bulk images. I tested with 3 images and the names are 0.jpg, 1.jpg, 2.jpg I assigned 5 seconds per slide and the video length is 15s. I executed the following command ffmpeg -r 0.2 -i tmp/%d.jpg -vcodec mpeg4 -y myslide.mp4 Of course, it seems all the things are normal and the video file is created. But when I play it, the last slide are not shown. As I change the video players, occurred the same thing. Some players are corrupted when the progress is in last slide. Why is this happened? Wrong (...)
• 06:47
  Change the camera resolution in of ip camera using ffmpeg library - Nouman Yosuf Newest 'ffmpeg' Questions - Stack Overflow
  I want to restrict ip camera with resolution height and AVFrame*-width. I tried using int av_image_check_size2(unsigned int w, unsigned int h, int64_t max_pixels, enum AVPixelFormat pix_fmt, int log_offset, void *log_ctx); but it doesn’t work as expected. I could not find my api that could change the camera resolution programmatically. Could any suggest how can I achieve this?
• 04:19
  FFMPEG - convert video without losing resolution - Srh Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg to convert mp4 video from youtube. The video is HD 1080. When I convert it to mpeg2video, the video loses its sharpness, regardless of the -s 1920x1080 parameter. How can I convert the video without losing picture sharpness? The command I use is: ffmpeg -i BBB.mp4 -vcodec mpeg2video -s1920x1080 -acodec copy -f mpegts BBB.ts
• 03:54
  FFmpeg: Pipe segments to s3 - Brendan Kennedy Newest 'ffmpeg' Questions - Stack Overflow
  I'd like to pipe ffmpeg segments to s3 without writing them to disk. ffmpeg -i t2.mp4 -map 0 -c copy -f segment -segment_time 20 output_%04d.mkv Is it possible to modify this command so that ffmpeg writes segments to an s3 bucket? Something like this perhaps? ffmpeg -i t2.mp4 -map 0 -c copy -f segment -segment_time 20 pipe:1 | aws s3 cp - s3://bucket/output_%04d.mkv When I run the command above I recieve this error Could not write header for output file #0 (incorrect codec parameters ?): Muxer not found This command works except the entire video is uploaded and not the individual (...)
• 00:59
  Getting small file size from ffmpeg [duplicate] - sukach Newest 'ffmpeg' Questions - Stack Overflow
  I am not an ffmpeg expert. I am trying to get some movies converted to a smaller DIVX file for a cheap portable DVD player for a family trip. The movies are for my kids so I'm not too concerned about quality. The DVD player is a 10.1", 1024x600 screen. It says it supports DIVX/MPEG2 files. It took me a lot of experimentation to get the right ffmpeg settings to even get it to work, but I found another answer that provided a very complex set of parameters that ultimately worked. I have converted about 20 movies with this setting and every one results in a file size of 1.1GB. I have tried (...)

19 February

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

• 23:45
  ffmpeg: no matches found: -map[v] - Zakk Rahman Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to merge 4 videos in split-screen with their audio together. ./ffmpeg -i ./clip11.mp4 -i ./clip21.mp4 -i ./clip31.mp4 -i ./clip41.mp4 -filter_complex "[0:v][1:v]hstack=inputs=2[top];[2:v][3:v]hstack=inputs=2[bottom];[top][bottom]vstack=inputs=2[v];amerge=inputs=4[a]" -map[v] -map[a] ./split21.mp4 I try tried and run the code, but it shows this as an error. zsh: no matches found: -map[v] I don't know whether my machine cannot configure the "map" because it happens the same thing when I tried to do "concat". I do not know what else to change about. I typed it out on the latest (...)
• 22:57
  Generating synthetic testsrc video counting at 10 fps, first frame is duplicated - Rotem Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to generate synthetic video using FFmpeg. I want the frame rate to be 10 fps, and I want testsrc counter to advance every frame. Problem: When the output file is mp4, the first video frame is duplicated 10 times. Question: Is it a bug in FFmpeg, or a problem in the command line arguments? I am using the following command: ffmpeg -y -r 10 -f lavfi -i testsrc=duration=10:size=192x108:rate=1 -c:v libx264 vid.mp4 The reason for setting rate=1 is for the counter to advance on each frame. The generated source pattern is designed to advance the counter every second. The reason (...) -- ,
• 22:29
  Creating iPhone compatible video with ffmpeg from an image and MP3 file - Gracie Newest 'ffmpeg' Questions - Stack Overflow
  I have the following command that I have used to create an MP4 video file from an image and an MP3 file, it plays fine in a Chrome browser on desktop and on an Android phone - but it doesn't work on an iPhone 10. Do I need some extra codec or setting to make this compatible for iPhone? Should I be converting this into a MPEG file instead for wider compatibility? ffmpeg -loop 1 -i 6f4aa5dfefc4dd32186f41315ad9d1e2-0.png -i "music.mp3" -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest aa-image0.mp4 Here are the ffprobe details for the input MP3 file used to create (...) -- https://ffmpeg-iphone-issue.netlify.com/tesla.jpg, https://ffmpeg-iphone-issue.netlify.com/tesla.mp3, https://ffmpeg-iphone-issue.netlify.com/tesla.mp4, https://www.youtube.com/watch?v=2FhmbKKh6mc
• 21:37
  Extract every audio and subtitles from a video with ffmpeg - WhatWhereWhen Newest 'ffmpeg' Questions - Stack Overflow
  I have multiple audio tracks and subtitles to extract in a single .mkv file. I'm new to ffmpeg commands, this is what I've tried (audio): ffmpeg -i VIDEO.mkv -vn -acodec copy AUDIO.aac It just extract 1 audio. What I want is tell ffmpeg to extract every single audio files and subtitle files to a destination, and keep the original name of each files and extensions. (Because I don't know which extension does the audio files are, sometimes maybe .flac or .aac). I'm not sure about the solutions I'd found online, because it's quite complicated, and I need explanations to know how it's (...)
• 20:55
  running ffmpeg via nodejs error - Greyhammer Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to run ffmpeg from node, and I'm getting an error. Here is the code var exec = require('child_process').exec; var cmd = '/home/ubuntu/bin/ffmpeg -i /home/ubuntu/input.flv -s 640x480 -y -codec:a aac -b:a 44.1k -r 15 -b:v 1000k -codec:v h264 -f mp4 /home/ubuntu/output.mp4'; exec(cmd, function(err, stdout, stderr) if (err) console.log('err:\\n' + err); if (stderr) console.log('stderr:\\n' + stderr); console.log('stdout:\\n' + stdout); ); When I run this node script, I get the following errors: err: Error: Command failed: /home/ubuntu/bin/ffmpeg -i /home/ubuntu/input.flv -s 640x480 (...)
• 19:22
  audio and webcam video files not synced at first - djl Newest 'ffmpeg' Questions - Stack Overflow
  I have an audio file (.wav) and webcam video file (.avi) that I'm trying to merge into a .mov file. Both files are 30 seconds; however, when I use ffmpeg to combine them, they aren't quite synced for the first ~10 seconds, before they eventually sync up. This may be because I had to increase the fps of the video file to 29.33 to make it 30 seconds -- this results in the video appearing like it's in fast-forward a bit. The command I'm using to merge the two files is as such: ffmpeg -i audio.wav -i video.avi output.mov I was wondering if there is a way for me to resolve this issue. (...)
• 15:46
  What is the best wrapper for libav in c++? [closed] - Daniel Newest 'ffmpeg' Questions - Stack Overflow
  Looking for a simple c++ wrapper for libav (ffmpeg). I would like to use it on Linux (Debian), and looking for something which does not add unnecessary overhead to libav. I did some research, found some wrappers, but most of them are outdated, or designed for Windows. I would like to achieve the same thing as ffmpeg, but my output would be a memory buffer (instead of file). Anyway, ffmpeg's functionality would be enough (actually it is much more than I would need so it might already have the unnecessary overhead). Goal is to remux an rtsp stream (h264) to fragmented mp4. Any sample (...)
• 10:56
  Does ffmpeg decode h264 bytestreams - paokdev Newest 'ffmpeg' Questions - Stack Overflow
  I have got a camera, which gives me a byte stream of a video over a socket. I need to decode the h264 byte stream and display the video. Does FFmpeg support h264 decoding? If yes could someone post an example? Thanks in advance
• 10:24
  librarys for a website based video merger? [closed] - swoompy Newest 'ffmpeg' Questions - Stack Overflow
  I'm a student (and school wont or cant help me figure this project out) and would like to make an online video merger, with fixed movie parts, where the user can select what topic it want in the movie and then compile it into to one file. some one a idea where to start? is it possible with ffmpeg? Cheers, swoompy
• 09:35
  bindProcessToNetwork does not work for live555's rtspclient - apan Newest 'ffmpeg' Questions - Stack Overflow
  When my phone is connected to the WiFi camera, the Android system will recognise the WiFi network as an unavailable network, and then automatically switch to mobile data, so I use bindProcessToNetwork to bind the network to the WiFi connection. When I use ffmpeg's rtsp module to connect to the WiFi camera, bindProcessToNetwork works well, but when I port live555 to the android platform, bindProcessToNetwork does not work when using rtspclient, it looks like rtspclient is still using mobile data connection instead of WiFi connection. How should I solve this (...)
• 09:09
  ERROR:Output file #0 does not contain any stream (ffmpeg) - Ali Asgher Badshah Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to make a thumbnail image from mp4 video using FFmpeg but I am getting the error that Output #0, image2, to 'output.jpg': Output file #0 does not contain any stream the command I used is ffmpeg -i file_example_MP4_700KB.mp4 -ss 00:00:01 -vf thumbnail,scale=200:115 -qscale:v 2 -frames:v 1 -f image2 -c:v mjpeg output.jpg and I am not sure what I am doing wrong and I stuck throw it for so long. Any suggestions will be good I am using Ubuntu 18.* full logs:- ffmpeg version n4.1.4 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1) (...) -- FFmpeg
• 06:51
  youtube_dl - Overwritting metadata - TipeneField Newest 'ffmpeg' Questions - Stack Overflow
  I have managed to extract the title and artist using the --metadata-from-title option, but it seems that it does not overwrite if those metadata items already exist in the video file. I'm am using: py -3 -m youtube_dl -o "%(title)s.%(ext)s" -x --audio-format mp3 --audio-quality 320K --embed-thumbnail --add-metadata --metadata-from-title "%(artist)s ~ %(title)s" oLNMnOYEMAA Is this is a bug? If not then is it possible to overwrite the existing values? I know that you can do it using the postprocessor-args command, but do not know if it is possible to pass the title and artist as (...)
• 05:38
  mp4 Vj Animation video lagging hi res video - Ryan Stone Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to get a video to play inside a video tag at the top left hand corner of my page, it loads ok, the resolution is good and it seems to be looping but it is lagging very much, definatly not achieving 60fps it is in mp4 format and the resolution on the original mp4 is 1920x1080 it is a hi resolution vj free loop called GlassVein, you can see it if you search on youtube. On right clicking properties it comes up with the following inforamtion; Bitrate:127kbs Data rate:11270kbps Total bitrate:11398kbs Audio sample rate is: 44khz filetype is:VLC media file(.mp4) (but i do not want (...) -- https://trac.ffmpeg.org/wiki/Encode/AAC

18 February

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

• 23:20
  Getting the aspect ratio of any video - Snip Hop Newest 'ffmpeg' Questions - Stack Overflow
  I want to get the aspect ratio of nay video in android like (1:1, 9:16 etc). Currently i get the height and width of a video but i want the aspect ratio. Is this task is possible with Ffmpeg or MediaMetadataRetriever? If yes, then please give me some example code. If no, then please suggest me the other solutions.
• 20:54
  Infinite stream from a video file (in a loop) - Josef Zamrzla Newest 'ffmpeg' Questions - Stack Overflow
  Is there any way howto create an infinite h264 stream from a video file (eg. mp4, avi, ...). I'd like to use ffmpeg to transcode avi file to h264 but there's no loop option for output.
• 20:18
  Where can I learn ffmpeg? - BubLblckZ Newest 'ffmpeg' Questions - Stack Overflow
  I really want to get more into video/audio encoding and decoding, and I’ve heard that ffmpeg is a good tool, but I can’t find any good tutorials for it. Does anyone know a good way to learn it?
• 18:42
  FFMPEG audio distorted after convertion using fluent-ffmpeg - Sujith Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert the following file to wav audio using FFMPEG Input File const ffmpeg = require('fluent-ffmpeg'); ffmpeg() .input('https://github.com/cleancoder7/FFmpeg-Playground/blob/master/audio_file.mp4?raw=true') .noVideo() .format('wav') .outputOptions('-ar 16000') .outputOptions('-ac 1') .on('start', commandLine => console.log(`Spawned Ffmpeg with command: $commandLine`)) .on('error', function (err) console.log('An error occurred: ' + err.message); ) .on('end', function () console.log('Processing finished !'); ) .save('converted_out.wav'); But i am getting distorted audio (...) -- Input File
• 18:38
  FFMPEG - Stream to RTMP output and save to MP4 at same time - with reconnect - Matt Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to setup a pipeline where I can take an input and save to MP4 whilst at the same time streaming to an RTMP server. So far I've been able to use a tee filter to achieve this and also using the onfail=ignore to make sure the pipeline stays up in the event of the RTMP/Recording failing. Which is great! However, I don't want the RTMP to just give up if it were to drop or be disconnected, I'd like it to keep attempting to reconnect and resume the stream. I don't think FFMPEG has something like this, so I'd need to write it in a bash script or something that keeps restarting the (...)
• 17:10
  Muting audio when video is not being played in complex filtergraph - Vitalis Hommel Newest 'ffmpeg' Questions - Stack Overflow
  My goal is to silence audio till when the appropriate video is playing. This is what I tried ffmpeg -i a.mp4 -itsoffset 00:00:4.061 -i b.mp4 -itsoffset 00:00:8.016 -i c.mp4 -itsoffset 00:00:12.016 -i d.mp4 -filter_complex "[0:a][2:a][3:a]amerge=inputs=3,volume=0[a0];[1:a]adelay=4061[a1];[a0][a1]amerge=inputs=2[audio]..." -map "[audio]" ... -r 60 -vcodec h264 zusammen.mp4 It starts playing together at the start to be overlayed at 4061. How do I hear the audio in sync with video while what is not being played is (...)
• 16:35
  Crop being ignored when added with resize filter - BN83 Newest 'ffmpeg' Questions - Stack Overflow
  Using the following: $video -> filters() -> resize(new FFMpeg\\Coordinate\\Dimension(480, 854)) -> crop(new FFMpeg\\Coordinate\\Point("t*100", 0, true), new FFMpeg\\Coordinate\\Dimension(480, 640)) ->watermark('watermark.png', array( 'position' => 'relative', 'bottom' => 10, 'right' => 10, )); I get a resized video but doesn't crop the to the proportions set. Resulting video is 480x854, with a watermark but not cropped. If I use: $video -> filters() -> crop(new FFMpeg\\Coordinate\\Point("t*100", 0, true), new FFMpeg\\Coordinate\\Dimension(480, 640)) )); It crops the image to the right size, but (...)
• 17:50
  How to discard corrupted frames in FFMPEG - atokzz Newest 'ffmpeg' Questions - Stack Overflow
  I'm running a command in FFMPEG that uses as input a stream video (Boroscope IP stream) and transform it to an .avi output. To do it, i ran the following command: ffmpeg -i tcp://192.168.10.123:7060 -c:v copy out.mov When i ran this command, some errors appeared in console: https://prnt.sc/r3ranr Even with the errors, the video was encoded. What happens is that some frames has a strange quality problem, probably because of these errors: https://prnt.sc/r3rb1h Im not aiming to solve this problem, all I want to do is to discard these corrupt frames through some parameter in FFMPEG, (...) -- https://prnt.sc/r3ranr, https://prnt.sc/r3rb1h
• 14:42
  FFMPEG profile-level-id size is invalid - Mulham Aryan Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to record a RTSP streaming from JVC KY-PZ 100. So for that i'm using ffmpeg with some parameters like segmentation, hls, ts, m3u8 etc ... i'm always getting an error The profile-level-id field size is invalid (41) and Error parsing AU headers This is the output of FFPROBE to debug the RTSP ffprobe -loglevel verbose -i rtsp://jvc:0000ⓐ192.168.0.124:554/stream ffprobe version 4.2.2 Copyright (c) 2007-2019 the FFmpeg developers built with Apple LLVM version 10.0.0 (clang-1000.11.45.5) configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2 --enable-shared --enable-pthreads (...)
• 14:35
  Invalid data when creating mkv container with h264 stream because extradata is null - pixelou Newest 'ffmpeg' Questions - Stack Overflow
  I need to encode raw frames into an h264 stream inside an mkv container using ffmpeg's c api. All the examples I could find copy existing codec parameters from a decoder so I had to modify it a bit. #include #include #include extern "C" #include #include #include #include #include static char error_msg[4096] = ""; int main(int argc, char **argv) int err; char *filename = (char *)av_malloc(4096); AVCodec *codec = nullptr; SwsContext *color_converter = nullptr; AVCodecContext *encoder = nullptr; AVFormatContext *container = nullptr; AVStream *stream = nullptr; std::snprintf(filename, (...)
• 14:17
  FFmpeg returns negative PTS and DTS for first non key frame - Olga Pshenichnikova Newest 'ffmpeg' Questions - Stack Overflow
  We have some envelope of FFmpeg, that processes the video. The tree first frames of video are: B -> B -> I as shown below: PTS and DTS returns negative for first frame: We have some code, that skips the frames that are below some timepoint (0 for first frame). Is it possible to ask FFmpeg to start from first frame and not from first I frame? -- ,
• 14:00
  converting an avi file to mp4 using ffmpeg - arjun_desai Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert avi file to mp4 using ffmpeg. However, when i convert, the resulting file is totally distorted. can anyone help? heres my code: import ffmpy ff = ffmpy.FFmpeg(inputs='ahm_0.6_core_plan.avi': None,outputs='output.mp4': None) ff.run()
• 13:37
  Parse stats in ffprobe - Marcos Newest 'ffmpeg' Questions - Stack Overflow
  I'm gathering some metadata information of audio files using ffprobe. However, due to my unfamiliarity with this tool, I'm getting extra information that's not necessary. This is the command that I'm running: ffprobe -f lavfi -i amovie=,astats=metadata=1:reset=4400 -hide_banner This is a short sample output of what I'm getting: Input #0, lavfi, from 'amovie=,astats=metadata=1:reset=4400': Duration: N/A, start: 0.000000, bitrate: 3072 kb/s Stream #0:0: Audio: pcm_f32le, 48000 Hz, stereo, flt, 3072 kb/s [Parsed_astats_1 ⓐ 0x7fcfd4d01140] Channel: 1 [Parsed_astats_1 ⓐ 0x7fcfd4d01140] DC (...)
• 10:34
  How to force specific AVInputFormat in code (FFMPEG)? - kugipark Newest 'ffmpeg' Questions - Stack Overflow
  ++Plaease understand that maybe some words or sentences could not be correct English.++ I'm novice programmer and developing a video player app for Android which can play 5ch .avi video from http. It based on ffplay.c in FFMPEG libarary. Currently I have 2 problems for this below. It has occured only in android devices. 1) Too much time taken for detecting format. opening and finding stream info takes more than a minute when I trying to open 5ch video source whereas normal .mp4 (h264) source open almost immediately. 2) Demuxing is too slow when it comes to large size video. If the (...) -- official doc site
• 10:06
  How to properly configure ffmpeg for the Go wrapper - Jack Ashton Newest 'ffmpeg' Questions - Stack Overflow
  I've been trying out the wrapper for ffmpeg written in Go (imkira/go-libav) and tried to follow the example, but after a successful build I've got an error that the decoder can't be found. This is the part of code where the error occurs: if ctx.decStream = firstStream(ctx.decFmt); ctx.decStream == nil log.Fatalf("Couldn't find a video stream.") codecCtx := ctx.decStream.CodecContext() codec := avcodec.FindDecoderByID(codecCtx.CodecID()) if codec == nil log.Fatalf("Could not find decoder: %v\\n", codecCtx.CodecID()) The first_stream function: func firstStream(fmtCtx *avformat.Context) (...) -- imkira/go-libav
• 09:07
  Is it possible to change volume with no reencode with ffmpeg? - John Smith Newest 'ffmpeg' Questions - Stack Overflow
  I just had this question because I used the following command with ffmpeg: ffmpeg -i input.wav -filter:a "volume=0.2" output.wav Following the documentation here: https://trac.ffmpeg.org/wiki/AudioVolume However, when I created the new file, the output was half the size of the input and the bitrate of the audio track was reduced as well. So my questions are: Is the bitrate supposed to decrease with decreasing and increasing volume like so? Is it possible to change volume without reencoding with (...) -- https://trac.ffmpeg.org/wiki/AudioVolume
• 05:54
  Gatsby Build fails on Netlify by works locally. Ffmpeg dependency issue - Hideo Daikoku Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to deploy my site on Netlify, and the gatsby build command works perfectly fine on my system. But when I run in on Netlify, I run into the issue shown below. Unhandled rejection: cannot find ffprobe seems to be the issue. I think it's because I have ffmpeg installed on my system (macOS) but there is no installation procedure during the build process in Netlify. Can somebody please guide me as to what I can do to fix this? 1:19:18 AM: info bootstrap finished - 5.299 s 1:19:18 AM: ⠀ 1:19:22 AM: error UNHANDLED REJECTION Cannot find ffprobe 1:19:23 AM: 1:19:23 AM: Error: Cannot (...)
• 04:29
  please critize my YouTube-DL & FFMPEG scripts - QX7337 Newest 'ffmpeg' Questions - Stack Overflow
  my goals are to download the best video and the best audio that YouTube has save the video with audio as VP9 & MKV save the audio as OGG and also as FLAC currently i cannot save the audio as OGG, only as FLAC. only after I have FLAC, i run another script to make a copy from the FLAC into OGG please help me improve my script so that i can have both FLAC & OGG in one run, automatically thank you here is my script --format "(bestvideo[vcodec^=av01][height>=1080][fps>30]/bestvideo[vcodec=vp9.2][height>=1080][fps>30]/bestvideo[vcodec=vp9][height>=1080][fps>30]/bestvideo[vcodec^=av01]

17 February

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

• 22:50
  Why do i get avc1.000000? (FFMPEG, H.264 Video Encoding, C++) - elastoss Newest 'ffmpeg' Questions - Stack Overflow
  I have a bunch of bitmaps, and need to make them encoded in h.264 in fragmented .mp4. I'm using C++. What could cause that my AVC Profile is set to 0, SPS[], PPS[] and codec string to avc1.000000? Output from the mp4info: File: minor version: 200 compatible brand: iso6 compatible brand: mp41 fast start: yes Movie: duration: 0 ms time scale: 1000 fragments: yes Found 1 Tracks Track 1: flags: 3 ENABLED IN-MOVIE id: 1 type: Video duration: 0 ms language: und media: sample count: 0 timescale: 90000 duration: 0 (media timescale units) duration: 0 (ms) bitrate (computed): 412.672 Kbps (...)
• 20:02
  Make .png and .gif to mp4 video using java code [closed] - Rahul Kumar Newest 'ffmpeg' Questions - Stack Overflow
  I have tried to make mp4 video using ffmpeg commond with 2 .png image and one gif image to mp4 video Sequence of the video will be aa1.png -> bb1.gif ->cc1.png = output.mp4 I have tried this code Process sysprocess = Runtime.getRuntime().exec(ffmpegPath+" -y -framerate 1 -start_number 1 -i "+splitFileGif+"\\\\img9.png -i "+splitFileGif+"\\\\"+animationImageFile.getOriginalFilename()+" -i "+splitFileGif+"\\\\main.mp3 -vf scale=720:756 -c:v libx264 -r 30 -pix_fmt yuv420p (...)
• 18:44
  when i build ffmpeg with cygwin there is an error occurs. How can i solve this? - Pradeep Simba Newest 'ffmpeg' Questions - Stack Overflow
  build_android.sh file path NDK=C:/Users/asus/AppData/Local/Android/Sdk/android-ndk-r21 How can I solve this? -- ,
• 17:31
  Error: libavcodec-ffmpeg.so.56: undefined symbol: av_packet_free when installing python arcade package - djack Newest 'ffmpeg' Questions - Stack Overflow
  i am trying to 'import arcade' which is a python module which can be found at https://arcade.academy/... one of the dependencies are ffmpeg. but whenver i try to run the code, it gies the error of "AttributeError: /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56: undefined symbol: av_packet_free".. how should i go about fixing it? -- https://arcade.academy/
• 17:11
  Save metadata while converting video to images FFmpeg - e480582 Newest 'ffmpeg' Questions - Stack Overflow
  When I convert a video to its constituent images (ffmpeg -i video.MOV img1%03d.png), ffmpeg drops all the metadata. How would I save the metadata while converting? Is there any way to have it also increment the timestamp for each frame?
• 17:10
  ffmpeg extract keyframes at scene change or at least every n seconds - Laura Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to extract key frames from an mp4 video file using ffmpeg. I need to extract a keyframe when a scene change is detected and, if no scene change is detecetd for 'n' seconds a I need to extract a frame as well. I was able to extract scenes change (plus the first frame) using the following parameters: -vf scale='iw/8:ih/8' -deinterlace -ss 00:00:00.000 -vframes 1 $$UNIQUE_FILE_NAME$$_000.jpg -deinterlace -vf select='gt(scene\\,0.4),scale=iw/8:ih/8',showinfo,metadata=print:file=frames-timestamps.txt -vsync vfr -frame_pts 1 $$UNIQUE_FILE_NAME$$_%d.jpg. I know how (...) -- https://www.bogotobogo.com/FFMpeg/ffmpeg_thumbnails_select_scene_iframe.php
• 17:08
  Infrequent ffmpeg in Google Cloud - suztomo Newest 'ffmpeg' Questions - Stack Overflow
  Which service should I use for my Go program that runs ffmpeg in Google Cloud Platform? The Go program downloads videos from my Google Cloud Storage and runs ffmpeg command to combine them into ~5 minutes mp4 file. I use this program only around 10 times in a month. I thought of using a compute instance with GPU to get fast ffmpeg processing. However, because of infrequency of the invocation, I don’t want to run the pricey GPU instance for all the time. Cloud Run does not seem to support GPU. What service would you choose for such (...)
• 16:10
  php-FFMpeg issue when adding watermark - BN83 Newest 'ffmpeg' Questions - Stack Overflow
  Currently getting the following error whilst trying to add a watermark to videos PHP Fatal error: Uncaught Alchemy\\BinaryDriver\\Exception\\ExecutionFailureException: ffmpeg failed to execute command '/usr/bin/ffmpeg' '-y' '-i' 'test.mp4' '-vcodec' 'libx264' '-acodec' 'libmp3lame' '-b:v' '1000k' '-refs' '6' '-coder' '1' '-sc_threshold' '40' '-flags' '+loop' '-me_range' '16' '-subq' '7' '-i_qfactor' '0.71' '-qcomp' '0.6' '-qdiff' '4' '-trellis' '1' '-b:a' '256k' '-ac' '2' '-vf' 'movie=watermark.png [watermark];[in][watermark] overlay=main_w - 50 - overlay_w:25 [out]' '-pass' '1' (...)
• 15:14
  php-ffmpeg installation on apache2 - BN83 Newest 'ffmpeg' Questions - Stack Overflow
  Trying to run PHP-FFMPEG and after install via composer I'm currently getting this. PHP Fatal error: Uncaught Alchemy\\BinaryDriver\\Exception\\ExecutableNotFoundException: Executable not found, proposed : avprobe, ffprobe in /var/www/html/vendor/alchemy/binary-driver/src/Alchemy/BinaryDriver/AbstractBinary.php:159\\nStack trace:\\n#0 /var/www/html/vendor/php-ffmpeg/php-ffmpeg/src/FFMpeg/Driver/FFProbeDriver.php(48): Alchemy\\BinaryDriver\\AbstractBinary::load(Array, NULL, Object(Alchemy\\BinaryDriver\\Configuration))\\n#1 /var/www/html/vendor/php-ffmpeg/php-ffmpeg/src/FFMpeg/FFProbe.php(226): (...)
• 13:10
  Video created via ffmpeg will not play on iPhone 10 or Huawei Android using Chrome - MHatton Newest 'ffmpeg' Questions - Stack Overflow
  I have created a video from a image and adding an MP3 file. It plays fine on my Moto G Android phone and on my desktop, but a collegue has said it will not play on his iPhone 10 or Huawei Android phone running Chrome. Does the following ffmpeg need an extra command adding to make the created MP4 more compatible across devices? ffmpeg -loop 1 -i 6f4aa5dfefc4dd32186f41315ad9d1e2-0.png -i "download.mp3" -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest (...)
• 13:02
  ffmpeg stream segmenting loses some frames after initialization - zerociudo Newest 'ffmpeg' Questions - Stack Overflow
  I use this ffmep command to get stream from usb camera and segment videos of 1 seconds ffmpeg -i /dev/video0 -pix_fmt yuv420p -vcodec libx264 \\ -r 15 -x264opts keyint=15:min-keyint=15 -crf 19 \\ -vf drawtext='expansion=strftime:fontfile='/usr/share/fonts/cantarell/Cantarell-Light.otf':fontsize=28:fontcolor=white:shadowcolor=black:shadowx=2:shadowy=1:text='%Y-%m-%d\\ %H\\\\\\\\:%m\\\\\\\\:%S':x=200:y=200'" \\ -f segment -reset_timestamps 1 -segment_time 1 -segment_format mp4 \\ -strftime 1 -map 0 output/%Y-%m-%d-%H:%M:%S.mp4 \\ The output that I get is Parsed_drawtext_0 ⓐ 0x5633950a66c0] Using (...)
• 12:41
  Is it possible to calculate the output file size before creating it using FFmpeg? - Prabhakar Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFmpeg to create an mp4 video from images. I use the following command to do that: ffmpeg -framerate 30 -i inp_%d.jpg -s 1920x1080 -y -crf 10 output.mp4 Is it possible to calculate the size of the output.mp4 file before it is generated (before executing the above command)?
• 12:15
  Double Extension, find and convert - Daniel Peters Newest 'ffmpeg' Questions - Stack Overflow
  Im trying to find and convert all mkv's in a folder and sub directories on ubuntu, ive tried various scripts and commands but cant get one that works fully, this is another one that sort of works but its outputs the file as samplevideo.mkv.mp4 how do i get rid of the .mkv so it renames to samplevideo.mp4 find /home/storage/folder -type f -name *.mkv -exec ffmpeg -i -c:v libx264 -preset ultrafast -minrate 4.5M -maxrate 4.5M -bufsize 9M -c:a ac3 .mp4 (...)
• 11:01
  Reduce video processing time using FFMpeg? - Ali Raza Newest 'ffmpeg' Questions - Stack Overflow
  Users of my app upload videos to my server and I process them to create different qualities, thumbnails and gifs etc. Which are then useful for mobile and web apps. It takes almost 15-20 minutes for each video to be processed. I am using ffmpeg. How can I reduce my processing time ?
• 10:47
  How can I convert a regular WAV file to a 4bit WAV file using ffmpeg? - Florin Mircea Newest 'ffmpeg' Questions - Stack Overflow
  I have tried something along the lines of C:\\ffmpeg\\ffmpeg -i "Blip_Select2.wav" -c:a wav -sample_fmt u8 "Blip_Select2_8bit.wav" but I cannot figure out how to access a 4bit conversion. I am using the audio for a c# project, 4 bit is sufficient and I prefer wav so I won't have to distribute a possibly restricted usage decoder with my files. Edit. I have found a solution using a different software (see my answer below), but I am accepting Mattias's answer as he provided the solution as asked, with (...)
• 08:24
  Convert Image and gif to mp4 video [closed] - Rahul Kumar Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to make mp4 video using ffmpeg with one 2 png image and one gif image to mp4 video First one png image will show on video then gif image will be display and after that second png image will be show in mp4 video
• 06:36
  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 (...)
• 05:05
  Delphi opencv ocvFFMpegIPCamSource to a bitmap? - Linces Marques Newest 'ffmpeg' Questions - Stack Overflow
  There is a way to a capture/convert ocvFFMpegIPCamSource stream to a bitmap? First I try to do this: FrameBitmap := TBitmap.Create; FrameBitmap.PixelFormat := pf24bit; Image5.Picture.Graphic := IplImage2Bitmap(ocvView1.Image, FrameBitmap); // Image5 is my bitmap. Obviously is geting a error, because "ocvView1.Image" is of type "IocvImage" and the first parameter of the function IplImage2Bitmap needs a type "pIpIImage" I missed something in the middle of the process.. Second i try using "cvImage2Bitmap": FrameBitmap := TBitmap.Create; FrameBitmap.PixelFormat := pf24bit; (...)
• 02:59
  FFMPEG not found error while attempting to implement ffmpeg into discord bot - Ravenr_ Newest 'ffmpeg' Questions - Stack Overflow
  While implementing a music feature into my node.js discord.js discord bot, I got an error claiming that it cant find FFMPEG. I reinstalled ffmpeg 3 times to no avail. This is the full error 2020-02-17T01:48:30.403766+00:00 app[worker.1]: (node:4) UnhandledPromiseRejectionWarning: Error: FFMPEG not found 2020-02-17T01:48:30.403797+00:00 app[worker.1]: at Function.selectFfmpegCommand (/app/node_modules/prism-media/src/transcoders/ffmpeg/Ffmpeg.js:46:13) 2020-02-17T01:48:30.403798+00:00 app[worker.1]: at new FfmpegTranscoder (...)
• 01:34
  MovieWriter FFwriter unavailable. Trying to use pillow instead - Life is Good Newest 'ffmpeg' Questions - Stack Overflow
  I have created a bar chart race in Matplotlib and now I am trying to save it into a gif file. I have imported the relevant library: import matplotlib.animation as animation plt.rcParams['animation.ffmpeg_path'] = '‪C:\\\\Program Files\\\\FFmpeg\\\\bin\\\\ffmpeg.exe' FFwriter = animation.FFMpegWriter() Here is the code I used to create my animation: fig, ax = plt.subplots(figsize=(15, 8)) animator = animation.FuncAnimation(fig, draw_barchart, frames=range(1999, 2015)) HTML(animator.to_jshtml()) However, when I searched for the writers, there are only two of them: animation.writers.list() I had (...) -- ,

16 February

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

• 10:37
  Unable to connect to UDP through opencv [closed] - Heyyaya Newest 'ffmpeg' Questions - Stack Overflow
  Currently on my windows laptop, I have setup a project which uses OpenCV to get live feed (udp) off my drone using the cv2.VideoCapture("udp://ⓐ") command. It works very well, yet when I try running my code on the pi, it doesn't recognize the video capture and returns errors including, unable to resize null object. Is there something I need installed inorder to get this working? Thanks
• 19:24
  Accurate cut of mp4 file using FFmpeg - user12129980 Newest 'ffmpeg' Questions - Stack Overflow
  I want to cut mp4 video to seperate videos by seconds in the example: 00:00:00 - 00:00:01 00:00:01 - 00:00:02 00:00:02 - 00:00:10.01 This is the commands I used: ffmpeg.exe -i 10sec.mp4 -ss 00:00:00 -t 00:00:01 -async 1 -strict -2 -c copy 0002.mp4 ffmpeg.exe -i 10sec.mp4 -ss 00:00:01 -t 00:00:02 -async 1 -strict -2 -c copy 0003.mp4 ffmpeg.exe -i 10sec.mp4 -ss 00:00:02 -t 00:00:10.01 -async 1 -strict -2 -c copy 0004.mp4 And the files I got are: 1.3 second long 2.6 second long 8.5 second long So obviously the cutting it's not accurate... I understand it's hes something to do with the (...)
• 16:30
  How to get motion vector via opencv/ffmpeg - william007 Newest 'ffmpeg' Questions - Stack Overflow
  How to get motion vector with opencv or via ffmpeg library? What are the motion vector algorithms that are supported in opencv/ffmpeg? (Are they state-of-the-art?)
• 15:05
  Capture Video using ffmpeg / mobile-ffmpeg - AsifHabib Newest 'ffmpeg' Questions - Stack Overflow
  I have to use the FFmpeg in my project. I have integrated mobile-ffmpeg according to instruction given. github/tanersener/mobile-ffmpeg I have used the pod which is as following. pod 'mobile-ffmpeg-full' I have to open the camera and I have executed the command as following. [MobileFFmpeg execute: ⓐ"-f avfoundation -r 30 -video_size 1280x720 -pixel_format bgr0 -i 0:0 -vcodec h264_videotoolbox -vsync 2 -f h264 -t 00:00:05 %ⓐ", recordFilePath]; It also asked the permission for camera, also for microphone then log starts appearing that camera is capturing the video, but there is no camera (...) -- github/tanersener/mobile-ffmpeg
• 15:04
  Concatenate directory and file name in GNU parallel - Lukasz Tracewski Newest 'ffmpeg' Questions - Stack Overflow
  I have the following directory structure: dir1/file.ogg dir2/file.ogg dir3/file.ogg file2.ogg I would like to convert all .ogg files to .wav with GNU Parallel. Here's where I got thus far: find . -name '*.*' -type f -print0 | parallel -0 ffmpeg -i outputdir//..wav The problem here is that although obviously directories have different names, the files inside have the same name. The aforementioned command will continuously overwrite the content of the directory. What I'd like instead is: outputdir/dir1_file.ogg outputdir/dir2_file.ogg outputdir/dir3_file.ogg outputdir/dir3_file2.ogg (...)
• 14:13
  Concatenating video clip with static image causes buffer errors - jgaeb Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to concatenate a 15 second clip of a video (MOVIE.mp4) with 5 seconds (no audio) of an image (IMAGE.jpg) using FFmpeg. Something seems to be wrong with my filtergraph, although I'm unable to determine what. The command I've put together is the following: ffmpeg \\ -loop 1 -t 5 -I IMAGE.jpg \\ -t 15 -I MOVIE.mp4 \\ -filter_complex "[0:v]scale=480:640[1_v];anullsrc[1_a];[1:v][1:a][1_v][1_a]concat=n=2:v=1:a=1[out]" \\ -map "[out]" \\ -strict experimental tst_full.mp4 Unfortunately, this seems to be creating some strange results: On my personal computer (FFmpeg 4.2.1) it correctly (...)
• 12:42
  Why is ffmpeg generating different audio lenght during conversion? - OldCastle Newest 'ffmpeg' Questions - Stack Overflow
  I'm converting a bunch of audio files CAF to WAV using for f in *.caf; do ffmpeg -i "$f" "$f%.caf.wav"; done however, the duration lenght doesn't match. See below: CAF Audio Format : AAC Format/Info : Advanced Audio Codec Codec ID : aac Duration : 4 s 800 ms Source duration : 4 s 853 ms Channel(s) : 2 channels Sampling rate : 44.1 kHz Compression mode : Lossy Source stream size : 36.0 KiB (22%) WAV Audio Format : PCM Format settings : Little / Signed Codec ID : 1 Duration : 4 s 852 ms Bit rate mode : Constant Bit rate : 1 411.2 kb/s Channel(s) : 2 channels Sampling rate : 44.1 kHz Bit (...)
• 10:54
  FFMpeg - Concat Video Files + Crossfade? - John Doe Newest 'ffmpeg' Questions - Stack Overflow
  Using BATCH-File, I am piping lots of videos to FFMpeg and would like to crossfade the transitions. Instead of going to black, I'd like them to overlap by 2 seconds during the transition. Audio is not necessary as the videos are all silent. I am adding looped audio separately. ( for /F %%i in ('dir /b "Folder\\*.mp4"') do ⓐecho file 'Folder/%%i' ) | ffmpeg -y -protocol_whitelist file,pipe -f concat -safe 0 -stream_loop -1 -i pipe: -stream_loop -1 -i "audio.mp3" -c copy -movflags faststart -fflags genpts -preset veryfast -t 3600 -r 30 "output.mp4" I've found lots of similar examples online (...)
• 06:54
  ffmpeg automaticall re-scaling. How can I prevent it wihtout having to provide height for 'force_original_aspect_ratio'? - user2328273 Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg to take screenshots of a video file. It seems some video files end up looking squished because ffmpeg is automatically rescaling them for some reason. I am using a python package to do this, not the CLI tool. The only options I am using are specifying the timestamp to capture and quiet output. I am try to get a lossless shot. I don't know why it is resizing automatically. I tried using the force_original_aspect_ratio option and setting it to -1 but it does not work without specifying the height. Is there any way to prevent this from happening without needing to provide (...)

15 February

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

• 19:57
  runtime/cgo: pthread_create failed: Resource temporarily unavailable - nadermx Newest 'ffmpeg' Questions - Stack Overflow
  I currently have this function, that pipes multiple youtubedl commands thru ffmpeg, and then pipes the output of ffmpeg to an HTTP client. func pipeThruFfmpegToMp4(vi *VideoInfo, rw web.ResponseWriter) error var ffmpeg *exec.Cmd ffmpeg = exec.Command( "ffmpeg", "-i", "-", "-i", "pipe:3", "-c:v", "copy", "-c:a", "copy", "-preset", "veryfast", "-metadata", fmt.Sprintf(`title=%s`, vi.GetTitle()), "-movflags", "frag_keyframe+empty_moov", "-f", "mp4", "-") youtubevideo := exec.Command(YoutubeDLPath, "-c", "-f", fmt.Sprintf("%s/bestvideo[ext=mp4]/bestvideo/best", vi.GetFormat()), (...) -- link to the entire program, golang-nuts forum
• 19:15
  FFMpeg - Concat Video Files + Fade Transition - John Doe Newest 'ffmpeg' Questions - Stack Overflow
  Using BATCH-File, I am piping lots of videos to FFMpeg and would like to crossfade the transitions. Instead of going to black, I'd like them to overlap by 2 seconds during the transition. Audio is not necessary as the videos are all silent. I am adding looped audio separately. ( for /F %%i in ('dir /b "Folder\\*.mp4"') do ⓐecho file 'Folder/%%i' ) | ffmpeg -y -protocol_whitelist file,pipe -f concat -safe 0 -stream_loop -1 -i pipe: -stream_loop -1 -i "audio.mp3" -c copy -movflags faststart -fflags genpts -preset veryfast -t 3600 -r 30 "output.mp4" I've found lots of similar examples online (...)
• 14:13
  Not able to show RTSP stream with Angular - Q.Rey Newest 'ffmpeg' Questions - Stack Overflow
  i'm working on a web application with angular where i need to show an rtsp stream inside my window. I'm using JSMpeg player related to this topic : Not able to Show live camera RTSP streaming with Angular. For my websocket i used the node websocket library and i runned it like this in my cmd : node websocket-relay.js supersecret 8081 8082 It detect each connection i make on it. Then for the conversion part i used FFMPEG where I convert a h264 format to mpegts (mpegvideo1 gave me an error) I run it like this : ffmpeg -i "rtsp://myurl/media.smp" -vcodec h264 -f mpegts (...) --
• 12:50
  Concatenating on Windows throws "Invalid data found when processing input" while it works on Mac and Linux - miguelmorin Newest 'ffmpeg' Questions - Stack Overflow
  I need to run a command with a nightly build of FFMPEG to report a bug on the concat protocol. I found it difficult to compile from source with libx264 support on Linux, and I want to spare my Mac computer, so I use the nightly build on Windows from Zeranoe. I call this command to concatenate the files: ffmpeg -safe 0 concat -i files_to_combine -vcodec libx264 show.mp4 where files_to_combine is: file ./short_DSC_0013.MOV file ./short_DSC_0014.MOV file ./short_DSC_0015.MOV file ./short_DSC_0016.MOV file ./short_DSC_0017.MOV file ./short_DSC_0018.MOV file ./short_DSC_0019.MOV I call this (...) -- Zeranoe
• 07:25
  Permission denied for openFileDescriptor to pass a file from SDCARD to FFmpeg - 1234567 Newest 'ffmpeg' Questions - Stack Overflow
  Permission denied for openFileDescriptor to pass a file from SDCARD to FFmpeg I am trying to work with a file from Sdcard which is to be passed to FFmpeg fro this I am using Uri contentUri = ContentUris.withAppendedId( MediaStore.Video.Media.EXTERNAL_CONTENT_URI, cursor.getLong(Integer.parseInt(BaseColumns._ID))); String fileOpenMode = "r"; ParcelFileDescriptor parcelFd = resolver.openFileDescriptor(contentUri, fileOpenMode); if (parcelFd != null) int fd = parcelFd.detachFd(); // Pass the integer value "fd" into your native code. Remember to call // close(2) on the file descriptor when (...)
• 06:00
  ffmpeg / avconv on ubuntu invalid data found when processing input - user3453357 Newest 'ffmpeg' Questions - Stack Overflow
  I have a .mp4 (h264) file on my ubuntu and try to rotate it using avconv (or ffmpeg, the result is the same). Actually, whatever action I'm trying to do with the file I get the "filename: invalid data found when processing input" The interesting thing is when I try to rotate the same file using ffmpeg library on windows, it runs smoothly. Below is the actual command that runs on windows, but doesn't run on ubuntu ffmpeg -i inputFile.mp4 -vf transpose=1 outputFile.mp4 Any help is appreciated, Thank you (...)
• 03:45
  [Turmux][ffmpeg] encounter "can't open stat file" when use "-pass" - Jackal Zhao Newest 'ffmpeg' Questions - Stack Overflow
  I installed ffmpeg in turmux, in my home directory, ran: ffmpeg -y -i /sdcard/FFMPEG/in.mp4 -c:v libx264 -b:v 2600k -pass 2 -c:a copy /sdcard/FFMPEG/out3.mp4 the error bumps: ratecontrol_init: can't open stats file if I enter /sdcard/FFMEPG folder first, then run ffmpeg -y -i /sdcard/FFMPEG/in.mp4 -c:v libx264 -b:v 2600k -pass 2 -c:a copy /sdcard/FFMPEG/out3.mp4 the task will run successfully. then I went back to turmux home directory, ran ffmpeg -y -i /sdcard/FFMPEG/in.mp4 -c:v libx264 -b:v 2600k -pass 2 -c:a copy /sdcard/FFMPEG/out3.mp4 , error still happens. so I then added (...)
• 02:52
  List of FFMPEG audio formats and their file extensions - vaid Newest 'ffmpeg' Questions - Stack Overflow
  I've tried to find information about this but to no avail. What audio formats and their file extensions are supported by FFMPEG? Is there a command that can list them all?
• 00:48
  How to process .ts files used by flowplayer? - user1424739 Newest 'ffmpeg' Questions - Stack Overflow
  Flowplay seems to be used by jove.com https://www.jove.com/video/59612/3d-kinematic-gait-analysis-for-preclinical-studies-in-rodents Take the above URL as an example, it will use .ts files like this (via Google Chrome devtools) https://cloudflare2.jove.com/CDNSource/hls/59612/59612_3.ts But I am not sure how to make the .ts file viewable locally. https://askubuntu.com/questions/3645/how-do-i-convert-ts-files-into-something-useful I tried something like this. But I always get errors. $ ffmpeg -i 50191_1.ts -c:v libx264 -crf 0 -c:a copy output.mp4 ffmpeg version 4.0.2 Copyright (c) (...) -- https://www.jove.com/video/59612/3d-kinematic-gait-analysis-for-preclinical-studies-in-rodents, https://cloudflare2.jove.com/CDNSource/hls/59612/59612_3.ts

14 February

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

• 21:37
  Convert RTP/UDP Stream to HTTP with ffmpeg - inversus Newest 'ffmpeg' Questions - Stack Overflow
  As you may know, Android uses a strange implementation of RTP - It can only play low bitrate RTP streams. On the other hand, it can play Full HD HTTP stream flawlessly. I'm trying a workaround for this problem: As stated in the title, using ffmpeg to convert the RTP/UDP stream to HTTP. I've already compile ffmpeg for android, but I'm having difficulties configuring the ffserver.conf. Is it possible to achieve what I want with ffmpeg? I dont need any transcoding, will it use lots of the processor/memory? Can you help me with these configurations? I receive a udp/rtp multicast stream: (...) -- http://127.0.0.1:8090/stream.mp4
• 19:31
  invalid dropping st:0 and Non-monotonous DTS in output stream 0:1 errors in ffmpeg - AlexZheda Newest 'ffmpeg' Questions - Stack Overflow
  I would really be thankful if I could get help with the following. ffmpeg -f concat -safe 0 -i mylist.txt -filter_complex "[0:v]setpts=.5*PTS[v1]; [0:a]atempo=2,asetpts=N/SR/TB[a1]" -c:v h264_nvenc -map "[v1]" -map "[a1]" x2_merged_vid.mp4 But I get 2 errors and the resulting video is broken with the sound disappearing around the middle of the video. One type of the errors (there are loads of those) is this: [mp4 ⓐ 0000019d21d66040] Non-monotonous DTS in output stream 0:1; previous: 28555274, current: 11264; changing to 28555275. This may result in incorrect timestamps in the output (...) -- here
• 19:31
  ffmpeg merge multiple (N) mono audio channels of a MXF video to multiple (M) stereo channels of MP4 video - Laura Newest 'ffmpeg' Questions - Stack Overflow
  I have an MXF file with 16 audio mono streams and I need to recode it in a mp4 file with 2 Thanks, Laura Find below the output of ffprobe on mxf file: "streams":[ "index":0, "codec_name":"mpeg2video", "codec_long_name":"MPEG-2 video", "profile":"4:2:2", "codec_type":"video", "codec_time_base":"1/25", "codec_tag_string":"[0][0][0][0]", "codec_tag":"0x0000", "width":1920, "height":1080, "coded_width":0, "coded_height":0, "has_b_frames":1, "sample_aspect_ratio":"1:1", "display_aspect_ratio":"16:9", "pix_fmt":"yuv422p", "level":2, "color_range":"tv", "color_space":"bt709", (...)
• 19:07
  How to display image for particular time in a video using ffmpeg - Pratik Bhingardeve Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to created a video from the sequence of images. But i have to display each image with different numbers of seconds. How to do this with FFMPEG. Thanks in advance.
• 16:52
  Rawvideo to mp4 container - Expressingx Newest 'ffmpeg' Questions - Stack Overflow
  How can I stream rawvideo codec to mp4 container? The error is Could not find tag for codec rawvideo in stream #0, codec not currently supported in container. Url is for example video=Logitech HD Webcam C270 and Format is dshow. Filename is lets say out.mp4 AVFormatContext* pInputFmtCtx = avformat_alloc_context(); AVInputFormat* inputFormat = av_find_input_format(Format); avformat_open_input(&pInputFmtCtx, url, inputFormat, null); if (avformat_find_stream_info(pInputFmtCtx, null) != -1) ... find stream index AVCodec* videoDecoder = (...)
• 15:27
  Using ffmpeg to overlay black line or add border to two side by side videos - user3135427 Newest 'ffmpeg' Questions - Stack Overflow
  I am using the following to generate a video that is side by side. ffmpeg -i left.mp4 -i right.mp4 -filter_complex "[0:v]setpts=PTS-STARTPTS, pad=iw*2:ih[bg]; [1:v]setpts=PTS-STARTPTS[fg]; [bg][fg]overlay=w" -y final.mp4 It looks like this. http://www.mo-de.net/d/partnerAcrobatics.mp4 I would like to place a vertical black line on top right in the middle or add a black border to the video on the left. If I add a border to the left video I would like to maintain the original sum dimension of the original videos. This solution would require subtracting the border width from the left (...) -- http://www.mo-de.net/d/partnerAcrobatics.mp4
• 14:18
  Live streaming: node-media-server + Dash.js configured for real-time low latency - Maoration Newest 'ffmpeg' Questions - Stack Overflow
  We're working on an app that enables live monitoring of your back yard. Each client has a camera connected to the internet, streaming to our public node.js server. I'm trying to use node-media-server to publish an MPEG-DASH (or HLS) stream to be available for our app clients, on different networks, bandwidths and resolutions around the world. Our goal is to get as close as possible to live "real-time" so you can monitor what happens in your backyard instantly. The technical flow already accomplished is: ffmpeg process on our server processes the incoming camera stream (separate child (...) -- https://dash.akamaized.net/envivio/EnvivioDash3/manifest.mpd
• 13:37
  Array of Bitmaps into Video with ffmpeg - Steve Jobs Kappa Newest 'ffmpeg' Questions - Stack Overflow
  I'm Facing current porblem. I have an Array of 100 Bitmaps. these are Screenshots i took from a view. I used JCodec to make it to a video, buts its waay to slow. Im hoping to get better results with FFmpeg Now i want to use the FFmpeg Library. Simillar questions were asked but i have no Idea how to use ffmpeg and how i have to use it in my specific case. All i see are weird Complex Commands See: File dir = your directory where image stores; String filePrefix = "picture"; //imagename prefix String fileExtn = ".jpg";//image extention filePath = dir.getAbsolutePath(); File src = new (...)
• 13:26
  Read a Bytes image from Amazon Kinesis output in python - Varun_Rathinam Newest 'ffmpeg' Questions - Stack Overflow
  I used imageio.get_reader(BytesIO(a), 'ffmpeg') to load a bytes image and save it as normal image. But the below error throws when I read the image using imageio.get_reader(BytesIO(a), 'ffmpeg') Traceback (most recent call last): File "", line 1, in File "/home/tango/anaconda3/lib/python3.6/site-packages/imageio/core/functions.py", line 186, in get_reader return format.get_reader(request) File "/home/tango/anaconda3/lib/python3.6/site-packages/imageio/core/format.py", line 164, in get_reader return self.Reader(self, request) File (...)
• 12:03
  How to ignore the other output streams if failed in ffmpeg? - geo-freak Newest 'ffmpeg' Questions - Stack Overflow
  I have an input video. I take the input and encode the video, and encode all the audio channels in it in a single command. I get 5.1 audio and sometimes stereo audio(once in a day randomly) from the live input. I use the following command to encode all the streams. ffmpeg -i input.ts -c:v libx264 -c:a libfdk_aac -y output.m3u8 \\ -vn -map_channel 0.1.0 -c:a libfdk_aac -ac 1 -y channel1.m3u8 \\ -vn -map_channel 0.1.1 -c:a libfdk_aac -ac 1 -y channel2.m3u8 \\ -vn -map 0:2 -c:a libfdk_aac -ac 1 -y channel3.m3u8 \\ -vn -map_channel 0.2.0 -c:a libfdk_aac -ac 1 -y channel4.m3u8 \\ -vn -map_channel (...)
• 12:00
  FFprob time stimstempt - user12129980 Newest 'ffmpeg' Questions - Stack Overflow
  I got this results: `media_type=video|stream_index=0|key_frame=1|pkt_pts=4004|pkt_pts_time=0.066733|pkt_dts=4004|pkt_dts_time=0.066733|best_effort_timestamp=4004|best_effort_timestamp_time=0.066733|pkt_duration=N/A|pkt_duration_time=N/A|pkt_pos=247781|pkt_size=3110400|width=1920|height=1080|pix_fmt=yuv420p|sample_aspect_ratio=1:1|pict_type=I|coded_picture_number=0|display_picture_number=0|interlaced_frame=0|top_field_first=0|repeat_pict=0|color_range=unknown|color_space=unknown|color_primaries=unknown|color_transfer=unknown|chroma_location=unspecified|tag:lavfi.scene_score=0.441274 (...)
• 09:47
  Android Studio: Array of Bitmaps into Video with ffmpeg - Steve Jobs Kappa Newest 'ffmpeg' Questions - Stack Overflow
  I'm Facing current porblem. I have an Array of 100 Bitmaps. these are Screenshots i took from a view. I used JCodec to make it to a video, buts its waay to slow. Im hoping to get better results with FFmpeg Now i want to use the FFmpeg Library. Simillar questions were asked but i have no Idea how to use ffmpeg and how i have to use it in my specific case. All i see are weird Complex Commands See: File dir = your directory where image stores; String filePrefix = "picture"; //imagename prefix String fileExtn = ".jpg";//image extention filePath = dir.getAbsolutePath(); File src = new (...)
• 09:28
  How to install ffmpeg in a docker container - T.Poe Newest 'ffmpeg' Questions - Stack Overflow
  I'm using aeneas python module which uses ffmpeg. I install ffmpeg in the dockerfile as follows: RUN apt-get update && apt-get install -y ffmpeg Now when I run the program, it fails with: aeneas.ffprobewrapper.FFPROBEPathError: Unable to call the 'ffprobe' ffprobe executable : [Errno 2] No such file or directory: 'ffprobe' and aeneas.audiofile.AudioFileProbeError: Unable to call ffprobe executable. So my question is, how can I successfully use ffmpeg in a docker container? I'm running Ubuntu (...)
• 08:56
  How to write a video stream containing B-frame and no DTS to a MP4 container? - SteveH Newest 'ffmpeg' Questions - Stack Overflow
  I want to save a h264 video stream received from a RTSP source to a MP4 container. Not like other questions asked on SO, here the challenges I face are: The stream contains B frames. The stream has only PTS given by the RTP/RTCP. Here is the code I did // ffmpeg pkt->data = ..; pkt->size = ..; pkt->flags = bKeyFrame? AV_PKT_FLAG_KEY : 0; pkt->dts = AV_NOPTS_VALUE; pkt->pts = PTS; // PTS is based on epoch microseconds so I ignored re-scaling. //av_packet_rescale_ts(pkt, 1, AV_TIME_BASE , muxTimebase); auto ret = av_interleaved_write_frame(m_pAVFormatCtx, pkt); I received a lot of (...)
• 06:11
  Using FFMPEG To Fill in Gaps of a Raw Audio UDP Stream - Wallace Newest 'ffmpeg' Questions - Stack Overflow
  I have a software defined radio (SDR) that picks up audio from emergency services and with the help of software, streams raw audio using UDP. The audio is PCM signed 16-bit little-endian. The UDP stream is also not constant and only has data when audio is detected. The problem I'm trying to solve is that I would like the gaps in recorded audio to be filled with silent or Null audio. Below are just a couple of my attempts at resolving this: ffmpeg -f s16le -ar 8000 -i udp://127.0.0.1:23456 -af aresample=async=1 -acodec libmp3lame - f rtp rtp://127.0.0.1:1234 ffmpeg -re -f lavfi -i (...)
• 03:57
  Cannot find x264 codec device for FFmpeg transcoding - Tom Ato Newest 'ffmpeg' Questions - Stack Overflow
  I am messing around with an FFmpeg transcoding tutorial (source: https://ffmpeg.org/doxygen/trunk/transcoding_8c-example.html) I am using FFmpeg 4.0.5 and built it successfully as follows: $ sudo apt-get install libx264-dev $ cd ffmpeg-4.0.5 $ ./configure --prefix=buildout --enable-shared --disable-static --disable-doc --enable-gpl --disable-opencl --enable-libx264 $ make $ sudo make install $ sudo ldconfig I have been looking at an article as well for guidance. (http://www.programmersought.com/article/71051173025/;jsessionid=2D01469BCFABF65530FCC81DBC04E9C0) The transcoding.c source (...) -- https://ffmpeg.org/doxygen/trunk/transcoding_8c-example.html, http://www.programmersought.com/article/71051173025/;jsessionid=2D01469BCFABF65530FCC81DBC04E9C0
• 01:42
  FFmpeg Concat Filter High Memory Usage - user2248702 Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFmpeg to join many short clips into a single long video using the concat filter. FFmpeg seems to load all clips into memory at once and quickly runs out of RAM (For 100 clips it eats over 32GB). Is there a way to limit the memory used by the concat filter? The command I would use for 3 inputs is as follows: ffmpeg -i 0.mp4 -i 1.mp4 -i 2.mp4 -filter_complex "[0:v][0:a][1:v][1:a][2:v][2:a]concat=n=3:v=1:a=1" out.mp4 It seems to use around 200MB per additional input, which quickly uses all the memory in my (...)
• 00:04
  Speed up FFmpeg processing time - ahmed galal Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFmpeg on android to: 1- merge 3 videos 2- add audio 3- add logo 4- trim one of the 3 videos 5- change fps for the output I have implemented the right code but it took 30 min. for (120 fps, 1:17 min) video. I added the flag ( -preset ultrafast ) and time decreased to 6 min. I need the time to be shorter than 6min. (2-3 min). Is this possible? Is there any better alternatives to ffmpeg? This is my code for ffmpeg: String command2 = "-y -i " + logo + " -i " + intro + " -ss " + start + " -t " + (end-start) + " -async 1 -i " + inputFile + " -i " + outro + " -i " + audio + " (...)