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• Compile FFmpeg with x264 for MacOS and Windows on Linux

  9 mars 2023, par RobinFrcd

  I successfully managed to compile a minimal standalone FFmpeg binary to create MP4 videos from JPG images encoded with x264. The binary is 100% functional and is 5.2MB.

  


  To do that, I used :

  


  ./configure \
--disable-everything \
--enable-decoder=mjpeg \
--enable-encoder=libx264 \
--enable-protocol=concat,file \
--enable-demuxer=image2 \
--enable-muxer=mp4 \
--enable-filter=scale \
--enable-gpl \
--enable-libx264 \
--extra-ldexeflags="-static" \
--pkg-config="pkg-config --static"


  


  I now would like to build the macOS and windows binaries directly from my Linux machine. I tried this repo and replaced the config args with mine, but the output exe is 30MB+. And I don't find anything about building for MacOS.

  


  Is there a solution to make this minimal build cross-platform compatible ?

  


• Buid Exoplayer with ffmpeg extension

  22 février 2021, par Bhoomi Kalavadiya

  I'm making IP streaming android application. In which I'm using exoplayer 2.12.0. Input video is having mpeg-L2 audio layer codec which is not supported by exoplayer https://github.com/google/ExoPlayer/issues/6525. So i'm using ffmpeg extension to render audio.
  
I have followed https://github.com/google/ExoPlayer/tree/release-v2/extensions/ffmpeg steps to build ffmpeg extension with android-ndk-r21d-linux-x86_64 and FFmpeg-release-4.3.
  
Added code in the application
  
TrackSelector trackSelectors = new DefaultTrackSelector(new AdaptiveTrackSelection.Factory()); RenderersFactory renderersFactory=new DefaultRenderersFactory(this,EXTENSION_RENDERER_MODE_ON,DEFAULT_ALLOWED_VIDEO_JOINING_TIME_MS); player = ExoPlayerFactory.newSimpleInstance(this, renderersFactory,trackSelectors);

  
Still audio is not coming and the log is as below
  
2020-12-01 05:05:10.803 9161-9161/demo.demoapps.com.exoplayer2udpdemo D/EventLogger : videoEnabled [eventTime=1.39, mediaPos=0.00, window=0, period=0]
  
2020-12-01 05:05:10.808 9161-9161/demo.demoapps.com.exoplayer2udpdemo D/EventLogger : tracks [eventTime=1.39, mediaPos=0.00, window=0, period=0, []]
  
2020-12-01 05:05:10.808 9161-9161/demo.demoapps.com.exoplayer2udpdemo I/MainActivity : onTracksChanged
  
2020-12-01 05:05:10.809 9161-9161/demo.demoapps.com.exoplayer2udpdemo I/MainActivity : 2
  
2020-12-01 05:05:10.809 9161-9161/demo.demoapps.com.exoplayer2udpdemo I/MainActivity : Format(2204/5204, null, null, video/mpeg2, null, -1, null, [720, 576, -1.0], [-1, -1])
  
2020-12-01 05:05:10.809 9161-9161/demo.demoapps.com.exoplayer2udpdemo I/MainActivity : Format(2204/6204, null, null, audio/mpeg-L2, null, -1, null, [-1, -1, -1.0], [2, 48000])
  
2020-12-01 05:05:10.813 9161-9161/demo.demoapps.com.exoplayer2udpdemo D/EventLogger : downstreamFormat [eventTime=1.40, mediaPos=0.00, window=0, period=0, id=2204/5204, mimeType=video/mpeg2, res=720x576]
  
2020-12-01 05:05:10.827 9161-9219/demo.demoapps.com.exoplayer2udpdemo I/OMXClient : IOmx service obtained
  
2020-12-01 05:05:10.926 9161-9218/demo.demoapps.com.exoplayer2udpdemo D/SurfaceUtils : connecting to surface 0x6f5abb1010, reason connectToSurface
  
2020-12-01 05:05:10.928 9161-9218/demo.demoapps.com.exoplayer2udpdemo I/MediaCodec : [OMX.qcom.video.decoder.mpeg2] setting surface generation to 9380865
  
2020-12-01 05:05:10.928 9161-9218/demo.demoapps.com.exoplayer2udpdemo D/SurfaceUtils : disconnecting from surface 0x6f5abb1010, reason connectToSurface(reconnect)
  
2020-12-01 05:05:10.929 9161-9218/demo.demoapps.com.exoplayer2udpdemo D/SurfaceUtils : connecting to surface 0x6f5abb1010, reason connectToSurface(reconnect)
  
2020-12-01 05:05:10.941 9161-9219/demo.demoapps.com.exoplayer2udpdemo I/ExtendedACodec : setupVideoDecoder()
  
2020-12-01 05:05:10.950 9161-9219/demo.demoapps.com.exoplayer2udpdemo I/ExtendedACodec : Decoder will be in frame by frame mode
  
2020-12-01 05:05:10.995 9161-9219/demo.demoapps.com.exoplayer2udpdemo D/SurfaceUtils : set up nativeWindow 0x6f5abb1010 for 720x576, color 0x7fa30c06, rotation 0, usage 0x20002900
  
2020-12-01 05:05:11.014 9161-9161/demo.demoapps.com.exoplayer2udpdemo D/EventLogger : videoDecoderInitialized [eventTime=1.60, mediaPos=0.00, window=0, period=0, OMX.qcom.video.decoder.mpeg2]
  
2020-12-01 05:05:11.015 9161-9161/demo.demoapps.com.exoplayer2udpdemo D/EventLogger : videoInputFormat [eventTime=1.60, mediaPos=0.00, window=0, period=0, id=2204/5204, mimeType=video/mpeg2, res=720x576]
  
2020-12-01 05:05:11.060 9161-9219/demo.demoapps.com.exoplayer2udpdemo D/SurfaceUtils : set up nativeWindow 0x6f5abb1010 for 720x576, color 0x7fa30c06, rotation 0, usage 0x20002900
  
2020-12-01 05:05:11.101 9161-9161/demo.demoapps.com.exoplayer2udpdemo D/EventLogger : videoSize [eventTime=1.69, mediaPos=0.00, window=0, period=0, 720, 576]
  
2020-12-01 05:05:11.153 9161-9161/demo.demoapps.com.exoplayer2udpdemo D/EventLogger : surfaceSize [eventTime=1.74, mediaPos=0.00, window=0, period=0, 786, 590]
  
2020-12-01 05:05:11.180 9161-9161/demo.demoapps.com.exoplayer2udpdemo D/EventLogger : renderedFirstFrame [eventTime=1.76, mediaPos=0.00, window=0, period=0, Surface(name=null)/@0x1c4f9a6]
  
2020-12-01 05:05:12.517 9161-9161/demo.demoapps.com.exoplayer2udpdemo I/MainActivity : onPlayerStateChanged : playWhenReady = true playbackState = 3
  
2020-12-01 05:05:12.517 9161-9161/demo.demoapps.com.exoplayer2udpdemo I/MainActivity : ExoPlayer ready ! pos :
  
2020-12-01 05:05:12.518 9161-9161/demo.demoapps.com.exoplayer2udpdemo D/EventLogger : state [eventTime=3.10, mediaPos=0.00, window=0, period=0, READY]
  
2020-12-01 05:05:12.523 9161-9161/demo.demoapps.com.exoplayer2udpdemo D/EventLogger : isPlaying [eventTime=3.11, mediaPos=0.00, window=0, period=0, true]
  

  

  
Here, With or without ffmpeg extension, I'm not getting audioEnabled log in Eventlogger.
Also after using ffmpeg audio render, I'm not getting it is being used or not.
Or am I missing some configuration of ffmpeg extension to Exoplayer ?


• How to concat videos that have different colour spaces ?

  17 avril 2023, par Ham789

  I writing a Python program that uses subprocess to automate ffmpeg. The program concatenates many videos together with the concat filter. The problem I have is that the colour of some of the videos is very washed out in the final output. I believe this is because the videos have different colour spaces. Some are B.709 and some are B.2020. The B.2020 videos are washed out.

  


  I have tried converting the B.2020 videos to B.709 before concatenating by using the following command on each video but the outputs are still washed out :

  


  ffmpeg -i input.mov -vf colorspace=all=bt709:iall=bt2020:fast=1 output.mov


  


  It wasn't clear to me which way round the arguments should go so I also tried switching the bt2020 and bt709 terms but they still look washed out but with more saturation.

  


  Is this the right approach ? Am I missing some other arguments in order to convert the B.2020 videos to B.709 while preserving their colour ?

  


  I have attached a side by side of the original and converted video.

  


  The metadata of the videos I am trying to concat are :

  


  Video 1

  


  

  • color_range=tv

  


  • color_space=bt709

  


  • color_transfer=bt709

  


  • color_primaries=bt709

  


  


  Video 2

  


  

  • color_range=tv

  


  • color_space=bt2020nc

  


  • color_transfer=arib-std-b67

  


  • color_primaries=bt2020