Recherche avancée

Sur d’autres sites (10893)

• ffmpeg streaming video not in sync

  3 avril 2019, par Tenaciousd93

  I have a problem saving a streaming with ffmpeg.
  The problem is that video is not in sync with audio.

  The video comes 2-3 seconds before the audio.

  I try by removing and editing options but nothing change, I make some research too and I try all solution described in this great answer posted here, but it didn’t work for me.

  I tried to download a chunk from playlist and I’ve got a .ts file with audio/video in sync.

  If I play the streaming with VLC player I can hear the audio without video for some seconds, then the video appear and is in sync with audio.

  ffplay play the same streaming correctly too : seems like there is the time information inside audio and video codec and can be played correctly in sync.

  How can I ask ffmpeg to take audio and video in sync ?

  If you need ffmpeg or ffplay outputs I will post them.

  ---

  Edit : as requested, I report the full ffmpeg output of a simple command to save stream output to file :

  $ ffmpeg -i http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/master.m3u8?hdnts=st=1554271074~exp=1554271524~acl=/*~hmac=14df2434241f7fd52f5a6012094367180f8567a1a733f7ef9eeef3dc7b46ebb2 -c copy out.mp4
  
  ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --disable-jack --enable-gpl --enable-ffplay --enable-libmp3lame --enable-libopus --enable-librtmp --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --enable-openssl --disable-lzma --enable-nonfree
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/index_2_av-p.m3u8?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/index_2_av-b.m3u8?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/index_1_av-p.m3u8?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/index_1_av-b.m3u8?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/index_2_a-p.m3u8?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/index_2_a-b.m3u8?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/segment155427138_2_av-p.ts?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/segment155427138_2_av-b.ts?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/segment155427138_1_av-p.ts?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/segment155427138_1_av-b.ts?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/segment155427138_2_a-p.ts?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/segment155427138_2_a-b.ts?sd=10&rebase=on' for reading
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdf0025e00] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdf0028200] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdf0028200] decode_slice_header error
  
  [h264 @ 0x7ffdf0028200] no frame!
  
  [NULL @ 0x7ffdf0025e00] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdf0028200] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdf0028200] decode_slice_header error
  
  [h264 @ 0x7ffdf0028200] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [NULL @ 0x7ffdf0025e00] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [h264 @ 0x7ffdf0028200] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdf0028200] decode_slice_header error
  
  [h264 @ 0x7ffdf0028200] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [NULL @ 0x7ffdf0025e00] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdf0028200] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdf0028200] decode_slice_header error
  
  [h264 @ 0x7ffdf0028200] no frame!
  
  [NULL @ 0x7ffdf0025e00] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [h264 @ 0x7ffdf0028200] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdf0028200] decode_slice_header error
  
  [h264 @ 0x7ffdf0028200] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  [NULL @ 0x7ffdef028000] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] non-existing PPS 0 referenced
  
  [h264 @ 0x7ffdef02a400] decode_slice_header error
  
  [h264 @ 0x7ffdef02a400] no frame!
  
  Input #0, hls,applehttp, from 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/master.m3u8?hdnts=st=1554271074~exp=1554271524~acl=/*~hmac=14df2434241f7fd52f5a6012094367180f8567a1a733f7ef9eeef3dc7b46ebb2':
  
    Duration: N/A, start: 65871.264133, bitrate: N/A
  
    Program 0 
  
      Metadata:
  
        variant_bitrate : 528000
  
      Stream #0:0: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv), 400x224, 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Metadata:
  
        variant_bitrate : 528000
  
      Stream #0:1: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
  
      Metadata:
  
        variant_bitrate : 528000
  
      Stream #0:2: Data: timed_id3 (ID3  / 0x20334449)
  
      Metadata:
  
        variant_bitrate : 528000
  
    Program 1 
  
      Metadata:
  
        variant_bitrate : 528000
  
      Stream #0:3: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv), 400x224, 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Metadata:
  
        variant_bitrate : 528000
  
      Stream #0:4: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
  
      Metadata:
  
        variant_bitrate : 528000
  
      Stream #0:5: Data: timed_id3 (ID3  / 0x20334449)
  
      Metadata:
  
        variant_bitrate : 528000
  
    Program 2 
  
      Metadata:
  
        variant_bitrate : 1328000
  
      Stream #0:6: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv), 720x404, 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Metadata:
  
        variant_bitrate : 1328000
  
      Stream #0:7: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
  
      Metadata:
  
        variant_bitrate : 1328000
  
      Stream #0:8: Data: timed_id3 (ID3  / 0x20334449)
  
      Metadata:
  
        variant_bitrate : 1328000
  
    Program 3 
  
      Metadata:
  
        variant_bitrate : 1328000
  
      Stream #0:9: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv), 720x404, 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Metadata:
  
        variant_bitrate : 1328000
  
      Stream #0:10: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
  
      Metadata:
  
        variant_bitrate : 1328000
  
      Stream #0:11: Data: timed_id3 (ID3  / 0x20334449)
  
      Metadata:
  
        variant_bitrate : 1328000
  
    Program 4 
  
      Metadata:
  
        variant_bitrate : 128000
  
      Stream #0:12: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
  
      Metadata:
  
        variant_bitrate : 128000
  
      Stream #0:13: Data: timed_id3 (ID3  / 0x20334449)
  
      Metadata:
  
        variant_bitrate : 128000
  
    Program 5 
  
      Metadata:
  
        variant_bitrate : 128000
  
      Stream #0:14: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
  
      Metadata:
  
        variant_bitrate : 128000
  
      Stream #0:15: Data: timed_id3 (ID3  / 0x20334449)
  
      Metadata:
  
        variant_bitrate : 128000
  
  Output #0, mp4, to 'out.mp4':
  
    Metadata:
  
      encoder         : Lavf57.83.100
  
      Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv), 720x404, q=2-31, 25 fps, 25 tbr, 90k tbn, 90k tbc
  
      Metadata:
  
        variant_bitrate : 1328000
  
      Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp
  
      Metadata:
  
        variant_bitrate : 528000
  
  Stream mapping:
  
    Stream #0:6 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [hls,applehttp @ 0x7ffdef800000] No longer receiving playlist 1rate=1167.5kbits/s speed=4.93x    
  
  [hls,applehttp @ 0x7ffdef800000] No longer receiving playlist 5
  
  [hls,applehttp @ 0x7ffdef800000] No longer receiving playlist 3
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/segment155427139_2_av-p.ts?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/segment155427139_1_av-p.ts?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] No longer receiving playlist 4
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/segment155427140_2_av-p.ts?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/segment155427140_1_av-p.ts?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/index_1_av-p.m3u8?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/segment155427141_1_av-p.ts?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/index_2_av-p.m3u8?sd=10&rebase=on' for reading
  
  [hls,applehttp @ 0x7ffdef800000] Opening 'http://la7livehls-lh.akamaihd.net/i/livebkup_1@372883/segment155427141_2_av-p.ts?sd=10&rebase=on' for reading
  
  [mp4 @ 0x7ffdf0170600] Non-monotonous DTS in output stream 0:1; previous: 1440768, current: 1439744; changing to 1440769. This may result in incorrect timestamps in the output file.
  
  (...)

• Unknown V4L2 pixel format equivalent for yuva420p with ffmpeg and v4l2loopback

  7 février 2019, par Kim

  I am trying to use filter_complex from ffmpeg to stich several video input together into one output.

  I use v4l2loopback to create a virtual video device :

  sudo modprobe v4l2loopback video_nr=90

  In this example, i first try with only one camera :

  v4l2-ctl --device=/dev/video0 --info gives the following output :

  Driver Info (not using libv4l2):
  
          Driver name   : uvcvideo
  
          Card type     : HD USB Camera
  
          Bus info      : usb-0000:00:14.0-13.2
  
          Driver version: 4.10.17
  
          Capabilities  : 0x84200001
  
                  Video Capture
  
                  Streaming
  
                  Extended Pix Format
  
                  Device Capabilities
  
          Device Caps   : 0x04200001
  
                  Video Capture
  
                  Streaming
  
                  Extended Pix Format
  
  Priority: 2
  
  Video input : 0 (Camera 1: ok)
  
  Format Video Capture:
  
          Width/Height      : 640/480
  
          Pixel Format      : 'YUYV'
  
          Field             : None
  
          Bytes per Line    : 1280
  
          Size Image        : 614400
  
          Colorspace        : sRGB
  
          Transfer Function : Default
  
          YCbCr Encoding    : Default
  
          Quantization      : Default
  
          Flags             :
  
  Crop Capability Video Capture:
  
          Bounds      : Left 0, Top 0, Width 640, Height 480
  
          Default     : Left 0, Top 0, Width 640, Height 480
  
          Pixel Aspect: 1/1
  
  Selection: crop_default, Left 0, Top 0, Width 640, Height 480
  
  Selection: crop_bounds, Left 0, Top 0, Width 640, Height 480
  
  Streaming Parameters Video Capture:
  
          Capabilities     : timeperframe
  
          Frames per second: 30.000 (30/1)
  
          Read buffers     : 0
  
                       brightness (int)    : min=0 max=15 step=1 default=8 value=8
  
                         contrast (int)    : min=0 max=15 step=1 default=8 value=8
  
                       saturation (int)    : min=0 max=15 step=1 default=7 value=7
  
                              hue (int)    : min=-10 max=10 step=1 default=0value=0
  
   white_balance_temperature_auto (bool)   : default=1 value=1
  
                            gamma (int)    : min=1 max=10 step=1 default=7 value=7
  
                             gain (int)    : min=0 max=0 step=0 default=0 value=0
  
             power_line_frequency (menu)   : min=0 max=2 default=2 value=2
  
        white_balance_temperature (int)    : min=2800 max=6500 step=1 default=2800 value=2800 flags=inactive
  
                        sharpness (int)    : min=0 max=15 step=1 default=6 value=6
  
           backlight_compensation (int)    : min=0 max=1 step=1 default=0 value=0
  
                    exposure_auto (menu)   : min=0 max=3 default=3 value=3
  
                exposure_absolute (int)    : min=4 max=5000 step=1 default=625 value=625 flags=inactive
  
                   focus_absolute (int)    : min=0 max=21 step=1 default=16 value=16 flags=inactive
  
                       focus_auto (bool)   : default=1 value=1

  Then i use this command to ouput /dev/video0 to /dev/video90 on the left side with a specific resolution :

  ffmpeg -loglevel verbose -y \
  
    -f v4l2 -thread_queue_size 512 -i /dev/video0 \
  
    -filter_complex "nullsrc=size=960x240 [base]; \
  
            [0:v] format=pix_fmts=yuva420p, setpts=PTS-STARTPTS, scale=320x240 [left]; \
  
            [base][left] overlay=shortest=1" \
  
    -f v4l2 /dev/video90

  Which results in the following error :

  [v4l2 @ 0x55fa67d02f60] Unknown V4L2 pixel format equivalent for yuva420p
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
  
  Error initializing output stream 0:0 --
  
  Conversion failed!

  Full logs :

  ffmpeg version 3.4.4-1~16.04.york0 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
    configuration: --prefix=/usr --extra-version='1~16.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    WARNING: library configuration mismatch
  
    avcodec     configuration: --prefix=/usr --extra-version='1~16.04.york0'--toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared --enable-version3 --disable-doc --disable-programs --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libtesseract --enable-libvo_amrwbenc
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  [video4linux2,v4l2 @ 0x55fa67cfca00] fd:5 capabilities:84200001
  
  [video4linux2,v4l2 @ 0x55fa67cfca00] Querying the device for the current frame size
  
  [video4linux2,v4l2 @ 0x55fa67cfca00] Setting frame size to 640x480
  
  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 273229.829138, bitrate: 147456 kb/s
  
      Stream #0:0: Video: rawvideo, 1 reference frame (YUY2 / 0x32595559), yuyv422, 640x480, 147456 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
  
  [Parsed_nullsrc_0 @ 0x55fa67d00680] size:960x240 rate:25/1 duration:-1.000000 sar:1/1
  
  [Parsed_scale_3 @ 0x55fa67d02240] w:320 h:240 flags:'bilinear' interl:0
  
  Stream mapping:
  
    Stream #0:0 (rawvideo) -> format
  
    overlay -> Stream #0:0 (rawvideo)
  
  Press [q] to stop, [?] for help
  
  [Parsed_nullsrc_0 @ 0x55fa67cfc760] size:960x240 rate:25/1 duration:-1.000000 sar:1/1
  
  [Parsed_scale_3 @ 0x55fa67d055c0] w:320 h:240 flags:'bilinear' interl:0
  
  [graph 0 input from stream 0:0 @ 0x55fa67d06a40] w:640 h:480 pixfmt:yuyv422 tb:1/1000000 fr:30/1 sar:0/1 sws_param:flags=2
  
  [auto_scaler_0 @ 0x55fa67d05d80] w:iw h:ih flags:'bilinear' interl:0
  
  [Parsed_format_1 @ 0x55fa67d04360] auto-inserting filter 'auto_scaler_0' between the filter 'graph 0 input from stream 0:0' and the filter 'Parsed_format_1'
  
  [auto_scaler_0 @ 0x55fa67d05d80] w:640 h:480 fmt:yuyv422 sar:0/1 -> w:640 h:480 fmt:yuva420p sar:0/1 flags:0x2
  
  [Parsed_format_1 @ 0x55fa67d04360] TB:0.000001 FRAME_RATE:30.000000 SAMPLE_RATE:nan
  
  [Parsed_scale_3 @ 0x55fa67d055c0] w:640 h:480 fmt:yuva420p sar:0/1 -> w:320 h:240 fmt:yuva420p sar:0/1 flags:0x2
  
  [Parsed_overlay_4 @ 0x55fa67d05e80] main w:960 h:240 fmt:yuva420p overlay w:320 h:240 fmt:yuva420p
  
  [Parsed_overlay_4 @ 0x55fa67d05e80] [framesync @ 0x55fa67d05fa8] Selected 1/1000000 time base
  
  [Parsed_overlay_4 @ 0x55fa67d05e80] [framesync @ 0x55fa67d05fa8] Sync level 2
  
  [v4l2 @ 0x55fa67d02f60] Unknown V4L2 pixel format equivalent for yuva420p
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
  
  Error initializing output stream 0:0 --
  
  Conversion failed!

  What I tried and didn’t work :

  • use -f h264 for the output, which ends in a av_interleaved_write_frame(): Invalid argument error

• ffmpeg, v4l, snd_aloop ... sound asyncron (alsa buffer xrun)

  28 janvier 2019, par Tobias

  I’m trying to create a stream that automatically reloads random inputs. I would like to extend this to a database later.

  Each time ffmpeg finishes and starts again, so the input changes, the connection to the rtmp is interrupted briefly causing the whole connection breaks down. I then tried to separate audio and video, to send them to virtual devices and read from there again. Split the stream on virtual devices, reassemble them directly and send them to rtmp. If the input is then exchanged, the sending to the devices interrupts what does not bother the second ffmpeg. As soon as I stop sending to the devices the fps go very slowly (10 - 20 sec) from 25 to 0. Only then does the transmitter ffmpeg break the connection to the rtmp. The script which exchanges the inputs needs only one second. A practical test showed that everything works as desired.

  I can quite comfortably change the input while the second ffmpeg maintains the stream ...

  The joy did not last long. The sound is good 1 sec delayed. But sporadically. Sometimes everything works great. Sometimes the sound is offset.

  I wrote several scripts for this.

  Background :

  1. File is selected by random
  2. Media file is split and written to / dev / video0 (v4l loopback) and alsa default (snd_aloop loopback)
  3. Put the splits together again and stream them to a rtmp server

  Code that selects the input and sends to / dev / video0 and alsa default

  #!/bin/bash
  
  
  
  cat /dev/null > log
  
  
  
  while true;
  
  do
  
  
  
    WATERMARK="watermark.png";
  
    dir='/homeXXXXXXXXXX/mix'
  
    file=`/bin/ls -1 "$dir" | sort --random-sort | head -1`
  
    DATEI=`readlink --canonicalize "$dir/$file"` # Converts to full path
  
  
  
  if [ -z $DATEI ]
  
  then
  
    echo "Keine Datei gefunden" >> log;
  
  else
  
    START=$(date +%s);
  
    echo "Sende $DATEI" >> log;
  
    ffmpeg -re -y -i "$DATEI" -c:v libx264 -vf "fps=25,scale=640:480,setdar=4:3" -async 1 -pix_fmt yuv420p -preset ultrafast -map 0:0 -f v4l2 -vcodec rawvideo /dev/video0 -f alsa default
  
  fi
  
  
  
  DOKILL=`cat kill`;
  
  if [ "$DOKILL" = "1"]
  
  then
  
    break;
  
  fi
  
  
  
  done

  The Output

  ./run.sh 
  
  ffmpeg version 3.2.12-1~deb9u1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
    configuration: --prefix=/usr --extra-version='1~deb9u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/mix/XXXXXXXXXXXXX.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      title           : XXXXXXXXXXXXXXX 
  
  
  
      encoder         : Lavf57.41.100
  
    Duration: 00:03:53.48, start: 0.000000, bitrate: 2705 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 2573 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Codec AVOption preset (Configuration preset) specified for output file #0 (/dev/video0) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
  
  [Parsed_setdar_2 @ 0x5571234fe020] num:den syntax is deprecated, please use num/den or named options instead
  
  -async is forwarded to lavfi similarly to -af aresample=async=1:min_hard_comp=0.100000:first_pts=0.
  
  Output #0, v4l2, to '/dev/video0':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      title           : XXXXXXXXXXX 
  
  
  
      encoder         : Lavf57.56.101
  
      Stream #0:0(und): Video: rawvideo (I420 / 0x30323449), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
        encoder         : Lavc57.64.101 rawvideo
  
  Output #1, alsa, to 'default':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      title           : XXXXXXXXXX 
  
  
  
      encoder         : Lavf57.56.101
  
      Stream #1:0(und): Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
        encoder         : Lavc57.64.101 pcm_s16le
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> rawvideo (native))
  
    Stream #0:1 -> #1:0 (aac (native) -> pcm_s16le (native))
  
  Press [q] to stop, [?] for help
  
  frame=  736 fps= 24 q=-0.0 Lsize=N/A time=00:00:29.67 bitrate=N/A speed=0.979x    
  
  video:331200kB audio:5112kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Exiting normally, received signal 2.

  The send script

  #!/bin/bash
  
  
  
  IP="XXXXXXXXX";
  
  
  
  ffmpeg -f video4linux2 -i /dev/video0 -f alsa -acodec pcm_s16le -i default -f flv -async 1 -pix_fmt yuv420p -preset ultrafast -vcodec libx264 -r 25 -s 640x260 -acodec aac rtmp://$IP:1935/live/test

  The Output

  ./send_stream.sh 
  
  ffmpeg version 3.2.12-1~deb9u1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
    configuration: --prefix=/usr --extra-version='1~deb9u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 1548393682.674066, bitrate: 110592 kb/s
  
      Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 640x480, 110592 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
  
  Guessed Channel Layout for Input Stream #1.0 : stereo
  
  Input #1, alsa, from 'default':
  
    Duration: N/A, start: 1548393682.677901, bitrate: 1536 kb/s
  
      Stream #1:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
  
  -async is forwarded to lavfi similarly to -af aresample=async=1:min_hard_comp=0.100000:first_pts=0.
  
  [libx264 @ 0x55e22cfa4f00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x55e22cfa4f00] profile Constrained Baseline, level 2.1
  
  [libx264 @ 0x55e22cfa4f00] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
  
  Output #0, flv, to 'rtmp://XXXXXXXXXXX:1935/live/test':
  
    Metadata:
  
      encoder         : Lavf57.56.101
  
      Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 640x260, q=-1--1, 25 fps, 1k tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc57.64.101 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 48000 Hz, stereo, fltp, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc57.64.101 aac
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [alsa @ 0x55e22cf87300] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  
  [video4linux2,v4l2 @ 0x55e22cf84fe0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  
  Past duration 0.613319 too large    7344kB time=00:01:05.85 bitrate= 913.5kbits/s speed=1.04x    
  
  Past duration 0.614372 too large    7644kB time=00:01:08.39 bitrate= 915.6kbits/s speed=1.04x    
  
  Past duration 0.609749 too large    7834kB time=00:01:10.91 bitrate= 905.0kbits/s speed=1.04x    
  
  Past duration 0.604362 too large    8038kB time=00:01:12.92 bitrate= 903.0kbits/s speed=1.04x    
  
  Past duration 0.609489 too large    8070kB time=00:01:13.45 bitrate= 900.1kbits/s speed=1.04x    
  
  Past duration 0.615013 too large    8094kB time=00:01:13.94 bitrate= 896.8kbits/s speed=1.04x    
  
  Past duration 0.610893 too large    8179kB time=00:01:14.94 bitrate= 894.0kbits/s speed=1.04x    
  
  Past duration 0.664711 too large
  
  Past duration 0.639565 too large    8263kB time=00:01:15.47 bitrate= 896.8kbits/s speed=1.04x    
  
  Past duration 0.668999 too large    8339kB time=00:01:15.94 bitrate= 899.5kbits/s speed=1.04x    
  
  Past duration 0.605766 too large
  
  Past duration 0.633049 too large    8399kB time=00:01:16.48 bitrate= 899.6kbits/s speed=1.04x    
  
  Past duration 0.674599 too large
  
  Past duration 0.616035 too large    8451kB time=00:01:16.95 bitrate= 899.7kbits/s speed=1.04x    
  
  Past duration 0.656136 too large
  
  Past duration 0.604195 too large
  
  Past duration 0.601387 too large    8512kB time=00:01:17.46 bitrate= 900.2kbits/s speed=1.04x    
  
  Past duration 0.621895 too large    8565kB time=00:01:17.95 bitrate= 900.1kbits/s speed=1.04x    
  
  Past duration 0.670937 too large    8605kB time=00:01:18.46 bitrate= 898.4kbits/s speed=1.04x    
  
  Past duration 0.604500 too large    8642kB time=00:01:18.99 bitrate= 896.2kbits/s speed=1.04x    
  
  frame= 1913 fps= 25 q=-1.0 Lsize=    8670kB time=00:01:19.48 bitrate= 893.6kbits/s speed=1.04x    
  
  video:7290kB audio:1280kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.160292%
  
  [libx264 @ 0x55e22cfa4f00] frame I:8     Avg QP:18.25  size: 15502
  
  [libx264 @ 0x55e22cfa4f00] frame P:1905  Avg QP:20.95  size:  3853
  
  [libx264 @ 0x55e22cfa4f00] mb I  I16..4: 100.0%  0.0%  0.0%
  
  [libx264 @ 0x55e22cfa4f00] mb P  I16..4:  6.4%  0.0%  0.0%  P16..4: 38.1%  0.0%  0.0%  0.0%  0.0%    skip:55.5%
  
  [libx264 @ 0x55e22cfa4f00] coded y,uvDC,uvAC intra: 46.0% 30.3% 13.4% inter: 20.1% 9.8% 1.1%
  
  [libx264 @ 0x55e22cfa4f00] i16 v,h,dc,p: 47% 34% 10%  9%
  
  [libx264 @ 0x55e22cfa4f00] i8c dc,h,v,p: 45% 28% 22%  5%
  
  [libx264 @ 0x55e22cfa4f00] kb/s:750.98
  
  [aac @ 0x55e22cfa62a0] Qavg: 579.067
  
  Exiting normally, received signal 2.

  First everything is fine and then comes

  Past duration 0.616035 too large    8451kB time=00:01:16.95 bitrate= 899.7kbits/s speed=1.04x    
  
  Past duration 0.656136 too large
  
  Past duration 0.604195 too large
  
  Past duration 0.601387 too large    8512kB time=00:01:17.46 bitrate= 900.2kbits/s speed=1.04x 

  And then when that comes, dives in the first window, so in the ffmpeg sends the input :

  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> rawvideo (native))
  
    Stream #0:1 -> #1:0 (aac (native) -> pcm_s16le (native))
  
  Press [q] to stop, [?] for help
  
  frame=    9 fps=0.0 q=-0.0 size=N/A time=00:00:00.36 bitrate=N/A dup=1 drop=0 spframe=   21 fps= 21 q=-0.0 size=N/A time=00:00:00.84 bitrate=N/A dup=1 drop=0 sp[alsa @ 0x5643b3293160] ALSA buffer xrun.
  
      Last message repeated 1 times
  
  frame=   33 fps= 22 q=-0.0 size=N/A time=00:00:01.32 bitrate=N/A dup=1 drop=0 sp[alsa @ 0x5643b3293160] ALSA buffer xrun.
  
      Last message repeated 1 times
  
  frame=   46 fps= 23 q=-0.0 size=N/A time=00:00:01.84 bitrate=N/A dup=1 drop=0 spframe=   58 fps= 23 q=-0.0 size=N/A time=00:00:02.32 bitrate=N/A dup=1 drop=0 spframe=   71 fps= 24 q=-0.0 size=N/A time=00:00:02.84 bitrate=N/A dup=1 drop=0 spframe=   83 fps= 24 q=-0.0 size=N/A time=00:00:03.32 bitrate=N/A dup=1 drop=0 sp[alsa @ 0x5643b3293160] ALSA buffer xrun.
  
  frame=   96 fps= 24 q=-0.0 size=N/A time=00:00:03.84 bitrate=N/A dup=1 drop=0 sp[alsa @ 0x5643b3293160] ALSA buffer xrun.

  The sound is then absolutely unsynchronized ...

  Does anyone have any advice and can help me ?