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