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• how to fix "FFmpeg cannot edit existing files in-place."-Problem in Java

  7 juillet 2019, par Suione

  I am trying to write an audio file to an existing videofile. Unfortunately I get the Logmessage, that I cannot edit existing files in-place.

  I have found some threads about the so called muxing between video and audio, but none of them could help me out really. Maybe some one of you can.
  Further this isn`t my could either. I am only the one who needs to use it, so I have to fix it.

  Thanks for your help

  String[] args = { FFMPEG_FILE.getAbsolutePath(), "-y", "-i", videoPath, "-ss", String.valueOf(-offset.toFrames() / 50.0f), "-i", audioPath, "-c", "copy", "-map", "0:v", "-map","1:a", "-bsf:v", "h264_mp4toannexb","-r", String.valueOf(project.getFramerate()), "-shortest",outputPath };
  
  
  
  ProcessBuilder pb = new ProcessBuilder(args).inheritIO();
  
  Process p = pb.start();
  
  int exit = p.waitFor();
  
  if (exit != 0) {
  
       throw new IOException("ffmpeg terminated with a failure");
  
  }

  EDIT : As someone commented outputPath was same same as videopath. So switched it to another, so this problem would not appear again. But I still have no sound in my outputvideos. I give you the LOG-information, so maybe you can read something out of it.

  INFO: start ffmpeg: [C:\Program Files\ffmpeg\bin\ffmpeg.exe, -y, -i, C:\Users\USERNAME\Desktop\Test_Workflow\1.mkv, -ss, 0.0, -i, C:\Users\USERNAME\Desktop\Test\resources/videos/P1000501.MP4\audio.ogg, -c, copy, -map, 0:v, -map, 1:a, -bsf:v, h264_mp4toannexb, -r, 25, -shortest, C:\Users\USERNAME\Desktop\Test\testoutput.mp4]
  
  ffmpeg version N-92087-gdcbd89e000 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 8.2.1 (GCC) 20180813
  
    configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  
    libavutil      56. 19.101 / 56. 19.101
  
    libavcodec     58. 31.102 / 58. 31.102
  
    libavformat    58. 18.104 / 58. 18.104
  
    libavdevice    58.  4.105 / 58.  4.105
  
    libavfilter     7. 33.100 /  7. 33.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
    libpostproc    55.  2.100 / 55.  2.100
  
  Input #0, matroska,webm, from 'C:\Users\USERNAME\Desktop\Test_Workflow\1.mkv':
  
    Metadata:
  
      ENCODER         : Lavf56.4.101
  
    Duration: 00:00:04.60, start: 0.080000, bitrate: 1377 kb/s
  
      Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
  
  Input #1, ogg, from 'C:\Users\USERNAME\Desktop\Test\resources/videos/P1000501.MP4\audio.ogg':
  
    Duration: 00:04:20.65, start: 0.000000, bitrate: 86 kb/s
  
      Stream #1:0(und): Audio: vorbis, 48000 Hz, stereo, fltp, 112 kb/s
  
      Metadata:
  
        CREATION_TIME   : 2018-11-09T13:20:07.000000Z
  
        LANGUAGE        : und
  
        ENCODER         : Lavc58.31.102 libvorbis
  
        MAJOR_BRAND     : mp42
  
        MINOR_VERSION   : 1
  
        COMPATIBLE_BRANDS: mp42avc1
  
  [mp4 @ 000001e67c0a00c0] track 1: codec frame size is not set
  
  Output #0, mp4, to 'C:\Users\USERNAME\Desktop\Test\testoutput.mp4':
  
    Metadata:
  
      encoder         : Lavf58.18.104
  
      Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
  
      Stream #0:1(und): Audio: vorbis (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 112 kb/s
  
      Metadata:
  
        CREATION_TIME   : 2018-11-09T13:20:07.000000Z
  
        LANGUAGE        : und
  
        ENCODER         : Lavc58.31.102 libvorbis
  
        MAJOR_BRAND     : mp42
  
        MINOR_VERSION   : 1
  
        COMPATIBLE_BRANDS: mp42avc1
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #1:0 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=  113 fps=0.0 q=-1.0 Lsize=     824kB time=00:00:04.41 bitrate=1530.8kbits/s speed= 634x    
  
  video:772kB audio:43kB subtitle:0kB other streams:0kB global headers:4kB muxing overhead: 1.092082%

• How to get frame number given a timestamp using ffmpeg

  1er décembre 2023, par Bartosz

  How can I get the frame number closest to a given time (relative to the start of the video) using ffmpeg ? The video has variable frame rate. I do not need any other metadata or the actual frame (image) itself. Speed is more important than precision (unless the possible error is more than a couple of seconds).

  


  Example :

  


  Input

  


  

  • video.mp4 (assuming ideal constant 30 fps for simplicity)

  


  • 00:00:05 (HH:MM:SS)

  


  


  Output

  


  

  • 150

  


  


• interplayacm : validate number of channels

  30 octobre 2016, par Andreas Cadhalpun

  interplayacm : validate number of channels
  The number of channels is used as divisor in decode_frame, so it must
  
  not be zero to avoid SIGFPE crashes.
  Reviewed-by : Paul B Mahol <onemda@gmail.com>
  
  Signed-off-by : Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
  

  • [DH] libavcodec/interplayacm.c