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Sur d’autres sites (14013)

  • ffmpeg adding 6 secs of black frames in the beginning of a file

    7 août 2014, par user3842039

    Trying to convert a .mov file (h264 and pcm) generated in Mpegstreamclip (MacOS) and the result is strangely out of sync with around 6 seconds of black frames at the beginning. I have tried many differente audio and video codec and the result is the same even with a -vcodec copy and -acodec copy. Below the return of ffmpeg (git version compiled today - 06/08/2014) :

            ffmpeg -i /media/dados/x/PGM-970.mov -vcodec copy -acodec copy  /media/dados/convertidos/PGM-970-converted-ffmpeg-compilado.mov 
    
    ffmpeg version 2.3.git-1ace957 Copyright (c) 2000-2014 the FFmpeg developers
    
      built on Jul 26 2014 20:25:06 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
    
      configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-x11grab --enable-libpulse --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr
    
      libavutil      52. 92.101 / 52. 92.101
    
      libavcodec     55. 69.100 / 55. 69.100
    
      libavformat    55. 49.100 / 55. 49.100
    
      libavdevice    55. 13.102 / 55. 13.102
    
      libavfilter     4. 11.102 /  4. 11.102
    
      libavresample   1.  3.  0 /  1.  3.  0
    
      libswscale      2.  6.100 /  2.  6.100
    
      libswresample   0. 19.100 /  0. 19.100
    
      libpostproc    52.  3.100 / 52.  3.100
    
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x2ddac20] multiple edit list entries, a/v desync might occur, patch welcome
    
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x2ddac20] Concatenated H.264 or H.265 might not play correctly.
    
    Guessed Channel Layout for  Input Stream #0.1 : mono
    
    Guessed Channel Layout for  Input Stream #0.2 : mono
    
    Guessed Channel Layout for  Input Stream #0.3 : mono
    
    Guessed Channel Layout for  Input Stream #0.4 : mono
    
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/media/dados/x/PGM-970.mov':
    
      Metadata:
    
        major_brand     : qt  
    
        minor_version   : 537199360
    
        compatible_brands: qt  
    
        creation_time   : 2014-08-01 16:50:24
    
      Duration: 00:24:56.30, start: 0.000000, bitrate: 8350 kb/s
    
        Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte1File '/media/dados/convertidos/PGM-970-converted-ffmpeg-compilado.mov' already exists. Overwrite ? [y/N] y
    

    
70m), 720x480, 5258 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 5994 tbc (default)
    
    Metadata:
    
      creation_time   : 2014-08-01 16:50:24
    
      handler_name    : Apple Alias Data Handler
    
      encoder         : H.264
    
      timecode        : 01:00:00;00
    
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels, s16, 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-08-01 16:50:24
    
      File '/media/dados/convertidos/PGM-970-converted-ffmpeg-compilado.mov' already exists. Overwrite ? [y/N] yhandler_name    : Apple Alias Data Handler
    
    Stream #0:2(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels, s16, 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-08-01 16:50:24
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:3(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels, s16, 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-08-01 16:50:24
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:4(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels, s16, 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-08-01 16:50:24
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:5(eng): Data: none (tmcd / 0x64636D74) (default)
    
    Metadata:
    
      creation_time   : 2014-08-01 16:51:16
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 01:00:00;00
    

    
Output #0, mov, to '/media/dados/convertidos/PGM-970-converted-ffmpeg-compilado.mov':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    encoder         : Lavf55.49.100
    
    Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuv420p, 720x480, q=2-31, 5258 kb/s, 29.97 fps, 11988 tbn, 2997 tbc (default)
    
    Metadata:
    
      creation_time   : 2014-08-01 16:50:24
    
      handler_name    : Apple Alias Data Handler
    
      encoder         : H.264
    
      timecode        : 01:00:00;00
    
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-08-01 16:50:24
    
      handler_name    : Apple Alias Data Handler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help

    Even ignoring the audio stream with "-an" ffmpeg persists to add the frames and alter the output duration.

    Any help is very much appreciated ! thanks in advance

  • how to Extract Audio from video with spring boot java in linux or windows system with ffmpeg coding part need guidance

    2 décembre 2022, par Makarand Burud

    I got this command but don't know the how to configure it for project on command line ?

    


    String[] command = "-y", "-i", filename, "-vn",
"-ar", "44100", "-ac", "2", "-b:a", "256k", "-f", "mp3" + fileStorageLocation ;

    


  • avfilter : support alternative keys in the alternative shorthand system

    10 avril 2013, par Michael Niedermayer

    avfilter : support alternative keys in the alternative shorthand system

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