Recherche avancée

Sur d’autres sites (13888)

• Trimmed a video with ffmpeg ; looks fine on a Mac, but audio/video are 3 seconds out of sync with Windows default player. Huh ?

  12 avril 2021, par kaltorak

  I've got a video which looks and sounds right when I play it in Windows or on a Mac.
  
I trimmed it with ffmpeg.
  
The resulting file

  


  

  • plays fine on a Mac with QuickTime

  


  • throws an error on Windows QuickTime (Error -2041 : an invalid sample description was found in the movie (myfile.trimmed.mp4))

  


  • plays with Win10's default player (Movies and TV ?), but with the audio lagging nearly 3 seconds behind the video (as determined by me counting Mississippis, nothing more precise than that.)

  


  


  My original file :

  


  ffprobe -hide_banner myfile.mpg
[h264 @ 00000253d2d762c0] Increasing reorder buffer to 2
[mpegts @ 00000253d2d6fe00] PES packet size mismatch
[mpegts @ 00000253d2d6fe00] Packet corrupt (stream = 1, dts = 8467425232).
[mpegts @ 00000253d2d6fe00] Could not find codec parameters for stream 2 (Unknown: none ([151][0][0][0] / 0x0097)): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mpegts, from 'myfile.mpg':
  Duration: 00:30:00.63, start: 92282.982578, bitrate: 6249 kb/s
  Program 1
    Stream #0:0[0x1aab]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, progressive), 1280x720 [SAR 1:1 DAR 16:9], Closed Captions, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
    Stream #0:1[0x1abf]: Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, 5.1(side), fltp, 384 kb/s
    Stream #0:2[0x1ac1]: Unknown: none ([151][0][0][0] / 0x0097)
Unsupported codec with id 0 for input stream 2


  


  Stuff I notice :

  


  

  • The mpg container shouldn't hold h264 video. That messed me up, but remuxing to an mp4 container during the trimming step seemed to make it OK.

  


  • The start time isn't anywhere close to zero... but I don't think there's anything wrong with that.

  


  • The audio and video are in sync as I watch in a player, but the file contains audio starting nearly 1 second before the video. The first audio packet has pkt_pts_time=92282.982578 (matching the start reported by ffprobe, above), while the first video packet has pkt_pts_time=92283.926411

  


  


  So I trim it, like so...

  


  ffmpeg -hide_banner -ss 00:17:24 -i myfile.mpg -t 00:02:40 -c copy myfile.trimmed.mp4
[h264 @ 000002d5d73f4040] Increasing reorder buffer to 2
[mpegts @ 000002d5d73edbc0] PES packet size mismatch
[mpegts @ 000002d5d73edbc0] Packet corrupt (stream = 1, dts = 8467425232).
[mpegts @ 000002d5d73edbc0] Could not find codec parameters for stream 2 (Unknown: none ([151][0][0][0] / 0x0097)): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 000002d5d73edbc0] PES packet size mismatch
[mpegts @ 000002d5d73edbc0] Packet corrupt (stream = 1, dts = 8467425232).
Input #0, mpegts, from 'myfile.mpg':
  Duration: 00:30:00.63, start: 92282.982578, bitrate: 6249 kb/s
  Program 1
    Stream #0:0[0x1aab]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, progressive), 1280x720 [SAR 1:1 DAR 16:9], Closed Captions, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
    Stream #0:1[0x1abf]: Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, 5.1(side), fltp, 384 kb/s
    Stream #0:2[0x1ac1]: Unknown: none ([151][0][0][0] / 0x0097)
[mp4 @ 000002d5d7e90540] track 1: codec frame size is not set
Output #0, mp4, to 'myfile.trimmed.mp4':
  Metadata:
    encoder         : Lavf58.45.100
    Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 59.94 fps, 59.94 tbr, 90k tbn, 90k tbc
    Stream #0:1: Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 384 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 9570 fps=0.0 q=-1.0 Lsize=  122587kB time=00:02:39.99 bitrate=6276.6kbits/s speed= 462x
video:114772kB audio:7545kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.220873%


  


  ffprobe -hide_banner myfile.trimmed.mp4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'myfile.trimmed.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
  Duration: 00:02:40.96, start: 0.000000, bitrate: 6239 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv), 1280x720 [SAR 1:1 DAR 16:9], Closed Captions, 5890 kb/s, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 384 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Side data:
      audio service type: main


  


  ...and i get the file that plays fine on a Mac, but not on Windows's default player.
The start time as reported by ffprobe is 0 (above), so that must've been cleaned up by either the trimming or the remuxing. When I look at frames, the first audio packet has a pkt_pts_time=0.000000, and the first video packet has a pkt_pts_time=0.452000.

  


  Where do I go next ?

  


• ffmpeg error opening filters at mobile browser

  1er novembre 2017, par lzmhhh123

  I use the ffmpeg at mobile browser. But it responds Error opening filter both at safari and chrome. I need help. The log are as following.

  The IOS 11.0.2 Safari logs :

  [Log] ffmpeg version n3.1.2 Copyright (c) 2000-2016 the FFmpeg developers (bundle.js, line 43469)
  
    built with emcc (Emscripten gcc/clang-like replacement) 1.36.7 ()
  
    configuration: --cc=emcc --enable-cross-compile --target-os=none --arch=x86 --disable-runtime-cpudetect --disable-asm --disable-fast-unaligned --disable-pthreads --disable-w32threads --disable-os2threads --disable-debug --disable-stripping --disable-all --enable-ffmpeg --enable-avcodec --enable-avformat --enable-avutil --enable-swresample --enable-swscale --enable-avfilter --disable-network --disable-d3d11va --disable-dxva2 --disable-vaapi --disable-vda --disable-vdpau --enable-decoder=vp8 --enable-decoder=vp9 --enable-decoder=theora --enable-decoder=mpeg2video --enable-decoder=mpeg4 --enable-decoder=h264 --enable-decoder=hevc --enable-decoder=png --enable-decoder=mjpeg --enable-decoder=vorbis --enable-decoder=opus --enable-decoder=mp3 --enable-decoder=ac3 --enable-decoder=aac --enable-decoder=ass --enable-decoder=ssa --enable-decoder=srt --enable-decoder=webvtt --enable-demuxer=matroska --enable-demuxer=ogg --enable-demuxer=avi --enable-demuxer=mov --enable-demuxer=flv --enable-demuxer=mpegps --enable-demuxer=image2 --enable-demuxer=mp3 --enable-demuxer=concat --enable-protocol=file --enable-filter=aresample --enable-filter=scale --enable-filter=crop --enable-filter=overlay --disable-bzlib --disable-iconv --disable-libxcb --disable-lzma --disable-sdl --disable-securetransport --disable-xlib --disable-zlib --enable-encoder=libx264 --enable-encoder=libmp3lame --enable-encoder=aac --enable-muxer=mp4 --enable-muxer=mp3 --enable-muxer=null --enable-gpl --enable-libmp3lame --enable-libx264 --extra-cflags=-I../lame/dist/include --extra-ldflags=-L../lame/dist/lib
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 48.101 / 57. 48.101
  
    libavformat    57. 41.100 / 57. 41.100
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
  [h264 @ 0x809df0] Warning: not compiled with thread support, using thread emulation
  
  [aac @ 0x80e380] Warning: not compiled with thread support, using thread emulation
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '53119917068__7A6AFE7C-86EC-42F4-8995-A9B09B16C2DB.MOV':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      creation_time   : 2017-11-01 03:19:31
  
      com.apple.quicktime.make: Apple
  
      com.apple.quicktime.model: iPhone 6
  
      com.apple.quicktime.software: 11.0.2
  
      com.apple.quicktime.creationdate: 2017-11-01T11:19:31+0800
  
    Duration: 00:00:00.20, start: 0.000000, bitrate: 1467 kb/s
  
      Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt709/bt709), 480x360, 1131 kb/s, 30 fps, 30 tbr, 600 tbn, 1200 tbc (default)
  
      Metadata:
  
        rotate          : 90
  
        creation_time   : 2017-11-01 03:19:31
  
        handler_name    : Core Media Data Handler
  
        encoder         : H.264
  
      Side data:
  
        displaymatrix: rotation of -90.00 degrees
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 80 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-11-01 03:19:31
  
        handler_name    : Core Media Data Handler
  
      Stream #0:2(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-11-01 03:19:31
  
        handler_name    : Core Media Data Handler
  
      Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-11-01 03:19:31
  
        handler_name    : Core Media Data Handler
  
  Error opening filters!

  The Android 7.0 Chrome logs :

  ffmpeg version n3.1.2 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with emcc (Emscripten gcc/clang-like replacement) 1.36.7 ()
  
    configuration: --cc=emcc --enable-cross-compile --target-os=none --arch=x86 --disable-runtime-cpudetect --disable-asm --disable-fast-unaligned --disable-pthreads --disable-w32threads --disable-os2threads --disable-debug --disable-stripping --disable-all --enable-ffmpeg --enable-avcodec --enable-avformat --enable-avutil --enable-swresample --enable-swscale --enable-avfilter --disable-network --disable-d3d11va --disable-dxva2 --disable-vaapi --disable-vda --disable-vdpau --enable-decoder=vp8 --enable-decoder=vp9 --enable-decoder=theora --enable-decoder=mpeg2video --enable-decoder=mpeg4 --enable-decoder=h264 --enable-decoder=hevc --enable-decoder=png --enable-decoder=mjpeg --enable-decoder=vorbis --enable-decoder=opus --enable-decoder=mp3 --enable-decoder=ac3 --enable-decoder=aac --enable-decoder=ass --enable-decoder=ssa --enable-decoder=srt --enable-decoder=webvtt --enable-demuxer=matroska --enable-demuxer=ogg --enable-demuxer=avi --enable-demuxer=mov --enable-demuxer=flv --enable-demuxer=mpegps --enable-demuxer=image2 --enable-demuxer=mp3 --enable-demuxer=concat --enable-protocol=file --enable-filter=aresample --enable-filter=scale --enable-filter=crop --enable-filter=overlay --disable-bzlib --disable-iconv --disable-libxcb --disable-lzma --disable-sdl --disable-securetransport --disable-xlib --disable-zlib --enable-encoder=libx264 --enable-encoder=libmp3lame --enable-encoder=aac --enable-muxer=mp4 --enable-muxer=mp3 --enable-muxer=null --enable-gpl --enable-libmp3lame --enable-libx264 --extra-cflags=-I../lame/dist/include --extra-ldflags=-L../lame/dist/lib
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 48.101 / 57. 48.101
  
    libavformat    57. 41.100 / 57. 41.100
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
  [hevc @ 0x809db0] Warning: not compiled with thread support, using thread emulation
  
  [aac @ 0x80ea90] Warning: not compiled with thread support, using thread emulation
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'VID_20171101_113436.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2017-11-01 03:34:40
  
      com.android.version: 7.0
  
    Duration: 00:00:02.69, start: 0.000000, bitrate: 32551 kb/s
  
      Stream #0:0(eng): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv), 3840x2160, 29756 kb/s, SAR 1:1 DAR 16:9, 29.60 fps, 29.83 tbr, 90k tbn, 90k tbc (default)
  
      Metadata:
  
        rotate          : 90
  
        creation_time   : 2017-11-01 03:34:40
  
        handler_name    : VideoHandle
  
      Side data:
  
        displaymatrix: rotation of -90.00 degrees
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 192 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-11-01 03:34:40
  
        handler_name    : SoundHandle
  
  Error opening filters!

• How to concatenate videos until a certain video length is reached FFMPEG [on hold]

  9 avril 2017, par Please Help

  I have some videos that I need to concatenate, but only until the video length has reached 10 minutes. How do I do this.