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• Flutter | Retrieve ffprobe data

  23 juin 2021, par YourLogarithm

  I'm using flutter_ffmpeg package, specifically I'm trying to retrieve information regarding the chapter marks from a .m4b file which is an audiobook. By using this method :

  


  _flutterFFmpeg.executeWithArguments(['-i', widget.book.path, '-print_format', 'json', '-show_chapters', '-loglevel', 'error']);


  


  I was able to output this data as a JSON map in the console. The thing is, I need to use this data inside my application, is there a way to get access to those chapters as a variable using another approach, or maybe to access this data directly from the console log printed by the method shown earlier.

  


• How to batch add chapters to video

  2 juin 2021, par throwaway513

  I have 20 videos and chapter files in .mp4 and .txt formats. Their filenames are 1.mp4 / 1.txt all the way to 20.mp4 / 20 txt. I want to match the same filename video to same filename chapters.

  


  How to batch add the metadata chapters to these videos in ffmpeg ? I am using windows

  


  for %%a in ("*.mp4") do ffmpeg -i "%%a" -i "%%a.txt" -map_metadata 1 -map 0 "Chapvids\%%~na"


  


  1.mp4.txt : No such file or directory

  


• Adding cover art to video wtih chapters and chapters getting deleted

  31 mai 2021, par throwaway513

  I am trying to add a cover art to a video with chapters.

  


  I added 2 chapters to a video using :

  


  ffmpeg -i 1.mp4 -i Chapters.txt -map_metadata 1 -c copy 2.mp4

  


  but when I try to add cover art it deletes the first chapter and only keeps the second ?

  


  ffmpeg -i 2.mp4 -i image.jpg -map 1 -map 0 -c copy -disposition:0 attached_pic 3.mp4

  


  I also tried mp3tag but the picture doesn't show on the file after adding chapters through ffmpeg. Chapters work fine on 2.mp4 but on 3.mp4 it deletes the first chapter. It also deletes the chapter when I do ffmpeg -i 2.mp4 -c copy any.mp4

  


  Chapter.txt

  


  ;FFMETADATA1
major_brand=isom
minor_version=512
compatible_brands=isomiso2avc1mp41
encoder=Lavf58.12.100

[CHAPTER]
TIMEBASE=1/1000
START=1152352
END=
title=

[CHAPTER]
TIMEBASE=1/1000
START=1378578
END=
title=


  


  ---

  


  C:\Users\Dark\Desktop\ffmpeg\bin>ffmpeg -i 1.mp4 -i Chapters.txt -map_metadata 1 -c copy 2.mp4
ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7.3.1 (GCC) 20180722
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --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. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001a7335c99c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 1970-01-01T00:00:00.000000Z
    encoder         : Lavf52.31.0
  Duration: 00:27:10.00, start: 0.000000, bitrate: 3338 kb/s
    Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, 3120 kb/s, 29.97 fps, 29.97 tbr, 770589.00 tbn, 59.94 tbc (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 103 kb/s (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : SoundHandler
    Stream #0:2: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 1:1 DAR 16:9], 90k tbr, 90k tbn, 90k tbc
Input #1, ffmetadata, from 'Chapters.txt':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.12.100
  Duration: 504900:42:04.42, start: 0.000000, bitrate: N/A
    Chapter #1:0: start 1152.352000, end 1817642524.416000
    Metadata:
      title           :
    Chapter #1:1: start 1378.578000, end 1817642524.416000
    Metadata:
      title           :
[mp4 @ 000001a733efdfc0] Application provided duration: 1817641372064 is invalid
[mp4 @ 000001a733efdfc0] Application provided duration: 1817641145838 is invalid
Output #0, mp4, to '2.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.12.100
    Chapter #0:0: start 1152.352000, end 1817642524.416000
    Metadata:
      title           :
    Chapter #0:1: start 1378.578000, end 1817642524.416000
    Metadata:
      title           :
    Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, q=2-31, 3120 kb/s, 29.97 fps, 29.97 tbr, 770589.00 tbn, 770589.00 tbc (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 103 kb/s (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=48851 fps=0.0 q=-1.0 Lsize=  642768kB time=00:27:09.96 bitrate=3230.5kbits/s speed=3.04e+03x
video:620855kB audio:20549kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.212700%


  


  ---

  


  C:\Users\Dark\Desktop\ffmpeg\bin>ffmpeg -i 2.mp4 -i image.jpg -map 1 -map 0 -c copy -disposition:0 attached_pic 3.mp4
ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7.3.1 (GCC) 20180722
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --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. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001cdbdbd9b40] Referenced QT chapter track not found
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.12.100
  Duration: 00:27:10.00, start: 0.000000, bitrate: 3230 kb/s
    Chapter #0:0: start 1152.352000, end 1378.578000
    Metadata:
      title           :
    Chapter #0:1: start 1378.578000, end 1629.996000
    Metadata:
      title           :
    Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, 3120 kb/s, 29.97 fps, 29.97 tbr, 770589.00 tbn, 59.94 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 103 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Input #1, image2, from 'image.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 24266 kb/s
    Stream #1:0: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 1:1 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
Output #0, mp4, to '3.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.12.100
    Chapter #0:0: start 1152.352000, end 1378.578000
    Metadata:
      title           :
    Chapter #0:1: start 1378.578000, end 1629.996000
    Metadata:
      title           :
    Stream #0:0: Video: mjpeg (mp4v / 0x7634706D), yuvj444p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 25 tbr, 12800 tbn, 25 tbc
    Stream #0:1(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, q=2-31, 3120 kb/s, 29.97 fps, 29.97 tbr, 770589.00 tbn, 770589.00 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:2(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 103 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #1:0 -> #0:0 (copy)
  Stream #0:0 -> #0:1 (copy)
  Stream #0:1 -> #0:2 (copy)
Press [q] to stop, [?] for help
frame=    1 fps=0.0 q=-1.0 Lq=-1.0 size=  642887kB time=00:27:09.96 bitrate=3231.1kbits/s speed=2.79e+03x
video:620973kB audio:20549kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.212752%