Answers.Body: <p>I've found solution. To achieve this I used MP4Box and group audio tracks, so I've put AAC tracks in group 1 and AC3 tracks in group 2.</p>
  
  <pre><code>mp4box -add "track1.h264:fps=24.000:delay=0:lang=en:name=Video" -add "track2.aac:delay=0:lang=en:name=English:group=1" -add "track3.ac3:delay=0:lang=en:name=English:group=2" -add "track4.aac:delay=0:lang=fr:name=French:group=1" -add "track5.ac3:delay=0:lang=fr:name=French:group=2" -new "muxed.m4v"
  </code></pre>
  
  <p>The above command creates new m4v file with 2 AAC tracks and 2 AC3 tracks, so iTunes will display "English" and "French" once and "Prefer AC3 Passthrough" option as well.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2018-02-17T13:44:15.350Z
Answers.LastActivityDate: 2018-02-17T13:44:15.350Z
Answers.UserDisplayName: user3719544
Body: <p>I've noticed that in movies download from iTunes Store there is duplicated audio track - the first one is AAC and the second one is AC3 but this is visible as one audio track with option "Prefer AC3 passthrough". I've compressed a movie in handbrake with AAC and AC3 audio but when I load this to iTunes, I see 2 audio tracks (same language) instead of 1. I've also noticed that when you put 2 audio tracks in the latest HandBrake, where the first one is AAC and the second one is AC3, iTunes displays this as one audio track. I wonder if there is any possibility to change my M4V file, so iTunes will display 1 audio track instead of 2 without recompressing the video? I'm thinking about using ffmpeg or mp4box to do that but have no idea how to deal with it.</p>
  
  <p>For better results I've created new files. One using HandBrake 0.10 and second using HandBrake 1.0.7. Both files are the same movie, same settings, the only difference is HandBrake version I've used. FFprobe output seems to be the same (except creation date).</p>
  
  <p>Below is the output from ffprobe for the file that is desirable and the file that has 2 audio tracks visible in iTunes:</p>
  
  <pre><code>ffprobe version 3.4 Copyright (c) 2007-2017 the FFmpeg developers
    built with gcc 7.2.0 (GCC)
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --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-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
    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
    libswscale      4.  8.100 /  4.  8.100
    libswresample   2.  9.100 /  2.  9.100
    libpostproc    54.  7.100 / 54.  7.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd:\tbbb_ok.m4v':
    Metadata:
      major_brand     : mp42
      minor_version   : 512
      compatible_brands: isomiso2avc1mp41
      creation_time   : 2018-02-17T09:09:52.000000Z
      title           : Big Buck Bunny
      artist          : Big Buck Bunny artist
      date            : 2018-01-01
      encoder         : HandBrake 1.0.7 2017040900
      genre           : Comedy
    Duration: 00:09:56.48, start: 0.000000, bitrate: 4857 kb/s
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 4048 kb/s, 24 fps, 24 tbr, 90k tbn, 48 tbc (default)
      Metadata:
        creation_time   : 2018-02-17T09:09:52.000000Z
        handler_name    : VideoHandler
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 160 kb/s (default)
      Metadata:
        creation_time   : 2018-02-17T09:09:52.000000Z
        handler_name    : Stereo
      Stream #0:2(und): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo, fltp, 640 kb/s
      Metadata:
        creation_time   : 2018-02-17T09:09:52.000000Z
        handler_name    : Stereo
      Side data:
        audio service type: main
  </code></pre>
  
  <p>.</p>
  
  <pre><code>ffprobe version 3.4 Copyright (c) 2007-2017 the FFmpeg developers
    built with gcc 7.2.0 (GCC)
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --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-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
    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
    libswscale      4.  8.100 /  4.  8.100
    libswresample   2.  9.100 /  2.  9.100
    libpostproc    54.  7.100 / 54.  7.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd:\tbbb_nok.m4v':
    Metadata:
      major_brand     : mp42
      minor_version   : 512
      compatible_brands: isomiso2avc1mp41
      title           : Big Buck Bunny
      artist          : Big Buck Bunny artist
      date            : 2018-01-01
      encoder         : HandBrake 0.10.1 2015030800
      genre           : Comedy
    Duration: 00:09:56.46, start: 0.000000, bitrate: 4806 kb/s
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 3997 kb/s, 24 fps, 24 tbr, 90k tbn, 48 tbc (default)
      Metadata:
        handler_name    : VideoHandler
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 160 kb/s (default)
      Metadata:
        handler_name    : Stereo
      Stream #0:2(und): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo, fltp, 640 kb/s
      Metadata:
        handler_name    : Stereo
      Side data:
        audio service type: main
  </code></pre>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-02-17T07:23:41.023Z
Comments.Text: Q is not clear.  Show ffprobe output for a file that appears as expected in iTunes and for a file that doesn't.
Comments.UserDisplayName: Gyan
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-02-17T10:37:58.083Z
Comments.Text: No significant difference. How does the iTunes display differ?
Comments.UserDisplayName: Gyan
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-02-17T10:51:37.453Z
Comments.Text: When I go to audio/subtitles language settings in iTunes there is for example "English" option twice and "Prefer AC3 Passthrough" option while on second video there is only "Prefer AC3 Passthrough".
Comments.UserDisplayName: user3719544
Tags: <ffmpeg><audio><mp4><apple>
Title: AAC and AC3 audio tracks in M4V file
UserDisplayName: user3719544
ThreadText: # AAC and AC3 audio tracks in M4V file
  
  (Asked by: username_0 on 2018-02-16)
  
  I've noticed that in movies download from iTunes Store there is duplicated audio track - the first one is AAC and the second one is AC3 but this is visible as one audio track with option "Prefer AC3 passthrough". I've compressed a movie in handbrake with AAC and AC3 audio but when I load this to iTunes, I see 2 audio tracks (same language) instead of 1. I've also noticed that when you put 2 audio tracks in the latest HandBrake, where the first one is AAC and the second one is AC3, iTunes displays this as one audio track. I wonder if there is any possibility to change my M4V file, so iTunes will display 1 audio track instead of 2 without recompressing the video? I'm thinking about using ffmpeg or mp4box to do that but have no idea how to deal with it.
  
  For better results I've created new files. One using HandBrake 0.10 and second using HandBrake 1.0.7. Both files are the same movie, same settings, the only difference is HandBrake version I've used. FFprobe output seems to be the same (except creation date).
  
  Below is the output from ffprobe for the file that is desirable and the file that has 2 audio tracks visible in iTunes:
  
  ```
  ffprobe version 3.4 Copyright (c) 2007-2017 the FFmpeg developers
    built with gcc 7.2.0 (GCC)
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --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-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
    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
    libswscale      4.  8.100 /  4.  8.100
    libswresample   2.  9.100 /  2.  9.100
    libpostproc    54.  7.100 / 54.  7.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd:\tbbb_ok.m4v':
    Metadata:
      major_brand     : mp42
      minor_version   : 512
      compatible_brands: isomiso2avc1mp41
      creation_time   : 2018-02-17T09:09:52.000000Z
      title           : Big Buck Bunny
      artist          : Big Buck Bunny artist
      date            : 2018-01-01
      encoder         : HandBrake 1.0.7 2017040900
      genre           : Comedy
    Duration: 00:09:56.48, start: 0.000000, bitrate: 4857 kb/s
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 4048 kb/s, 24 fps, 24 tbr, 90k tbn, 48 tbc (default)
      Metadata:
        creation_time   : 2018-02-17T09:09:52.000000Z
        handler_name    : VideoHandler
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 160 kb/s (default)
      Metadata:
        creation_time   : 2018-02-17T09:09:52.000000Z
        handler_name    : Stereo
      Stream #0:2(und): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo, fltp, 640 kb/s
      Metadata:
        creation_time   : 2018-02-17T09:09:52.000000Z
        handler_name    : Stereo
      Side data:
        audio service type: main
  
  ```
  
  .
  
  ```
  ffprobe version 3.4 Copyright (c) 2007-2017 the FFmpeg developers
    built with gcc 7.2.0 (GCC)
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --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-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
    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
    libswscale      4.  8.100 /  4.  8.100
    libswresample   2.  9.100 /  2.  9.100
    libpostproc    54.  7.100 / 54.  7.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd:\tbbb_nok.m4v':
    Metadata:
      major_brand     : mp42
      minor_version   : 512
      compatible_brands: isomiso2avc1mp41
      title           : Big Buck Bunny
      artist          : Big Buck Bunny artist
      date            : 2018-01-01
      encoder         : HandBrake 0.10.1 2015030800
      genre           : Comedy
    Duration: 00:09:56.46, start: 0.000000, bitrate: 4806 kb/s
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 3997 kb/s, 24 fps, 24 tbr, 90k tbn, 48 tbc (default)
      Metadata:
        handler_name    : VideoHandler
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 160 kb/s (default)
      Metadata:
        handler_name    : Stereo
      Stream #0:2(und): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo, fltp, 640 kb/s
      Metadata:
        handler_name    : Stereo
      Side data:
        audio service type: main
  
  ```
  
  **Tags:** ffmpeg, audio, mp4, apple
  
  > **Comments:**
  > **username_1**: Q is not clear.  Show ffprobe output for a file that appears as expected in iTunes and for a file that doesn't.  
  > **username_1**: No significant difference. How does the iTunes display differ?  
  > **username_0**: When I go to audio/subtitles language settings in iTunes there is for example "English" option twice and "Prefer AC3 Passthrough" option while on second video there is only "Prefer AC3 Passthrough".  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2018-02-17. Score: 1
  
  I've found solution. To achieve this I used MP4Box and group audio tracks, so I've put AAC tracks in group 1 and AC3 tracks in group 2.
  
  ```
  mp4box -add "track1.h264:fps=24.000:delay=0:lang=en:name=Video" -add "track2.aac:delay=0:lang=en:name=English:group=1" -add "track3.ac3:delay=0:lang=en:name=English:group=2" -add "track4.aac:delay=0:lang=fr:name=French:group=1" -add "track5.ac3:delay=0:lang=fr:name=French:group=2" -new "muxed.m4v"
  
  ```
  
  The above command creates new m4v file with 2 AAC tracks and 2 AC3 tracks, so iTunes will display "English" and "French" once and "Prefer AC3 Passthrough" option as well.
  
  
  ---
  
  