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Sur d’autres sites (11922)

  • avformat/mov : Add support for reading and exporting horizontal field of view

    30 mai 2024, par Derek Buitenhuis
    avformat/mov : Add support for reading and exporting horizontal field of view

    These boxes are created by the Apple Vision Pro and the iPhone 15+ when
    
capture for the Vision Pro is enabled.
    

    Based off of the swift API :
    
  * https://developer.apple.com/documentation/coremedia/kcmformatdescriptionextension_horizontalfieldofview
    

    Signed-off-by : Derek Buitenhuis <derek.buitenhuis@gmail.com>
    • [DH] libavformat/mov.c

  • How to mux *only* TTML subtitles into fmp4 file(s)

    25 juin 2021, par Chris

    As of WWDC 2017, HLS on Apple devices has supported TTML (specifically IMSC1)

    &#xA;

    Subtitles are made available to me in a single XML file, which I wish to slice/package so that it can be distributed alongside the video assets, i.e. as fmp4 fragments containing only the subtitle stream.

    &#xA;

    (slicing is not strictly required - correct muxing into a single file would be acceptable)

    &#xA;

    While it feels like something that ffmpeg or mp4box should be capable of doing, documentation for correctly achieving that is proving elusive. Examples, including this one which would perform slicing and m3u8 generation, all assume subtitles are being added to a video asset, rather than packaged to be delivered in parallel.

    &#xA;

    Any attempt to approximate that, having removed video-specific options only results in errors :

    &#xA;

    ffmpeg -i subitles.ttml \&#xA;    -hls_time 60 \&#xA;    -hls_playlist_type vod \&#xA;    -hls_segment_type fmp4 \&#xA;    -hls_segment_filename "segment%d.m4s" \&#xA;    index.m3u8&#xA;    &#xA;subtitles.ttml: Invalid data found when processing input&#xA;

    &#xA;

    Whether this is because the TTML is invalid (although I don't believe that's likely), or because FFmpeg is trying to read it as if it was video, I cannot say.

    &#xA;

  • ffmpeg export multichannel audio -map

    8 avril 2014, par speedyrazor

    I am trying to export all audio channels from a multichannel quicktime file with ffmpeg which has the following audio configuration, but am unsure if the command below is correct. All the files look and play correct in Quicktime player except the L+R_Total.wav which refuses to play in Quicktime player but plays fine in VLC, so not sure if i'm using the wrong command :

    Track 1 - mono
    
Track 2 - mono
    
Track 3 - mono
    
Track 4 - mono
    
Track 5 - mono
    
Track 6 - mono
    
Track 7 - stereo

    I am using :

    /Users/me/Desktop/python/ffmpeg/ffmpeg -i /Users/me/Desktop/test.mov -acodec pcm_s24le -map 0:1 -y Left.wav -acodec pcm_s24le -map 0:2 Right.wav -acodec pcm_s24le -map 0:3 Center.wav -acodec pcm_s24le -map 0:4 LFE.wav -acodec pcm_s24le -map 0:5 Left_Surround.wav -acodec pcm_s24le -map 0:6 Right_Surround.wav -acodec pcm_s24le -map 0:7 Left+Right_Total.wav

    Here is the printout from the terminal :

        MacBook-Pro:~ me$ /Users/me/Desktop/python/ffmpeg/ffmpeg -i /Users/me/Desktop/test.mov -acodec pcm_s24le -map 0:1 -y Left.wav -acodec pcm_s24le -map 0:2 Right.wav -acodec pcm_s24le -map 0:3 Center.wav -acodec pcm_s24le -map 0:4 LFE.wav -acodec pcm_s24le -map 0:5 Left_Surround.wav -acodec pcm_s24le -map 0:6 Right_Surround.wav -acodec pcm_s24le -map 0:7 Left+Right_Total.wav
    
ffmpeg version 2.2 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Mar 25 2014 15:00:55 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
    
  configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --arch=x86_64 --enable-runtime-cpudetect
    
  libavutil      52. 66.100 / 52. 66.100
    
  libavcodec     55. 52.102 / 55. 52.102
    
  libavformat    55. 33.100 / 55. 33.100
    
  libavdevice    55. 10.100 / 55. 10.100
    
  libavfilter     4.  2.100 /  4.  2.100
    
  libswscale      2.  5.102 /  2.  5.102
    
  libswresample   0. 18.100 /  0. 18.100
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from &#39;/Users/me/Desktop/test.mov&#39;:
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    creation_time   : 2014-03-06 11:25:34
    
  Duration: 00:01:03.48, start: 0.000000, bitrate: 153967 kb/s
    
    Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le, 1920x1080, 144704 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 23976 tbn, 23976 tbc (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:00:00:00
    
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FL), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FR), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:4(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (LFE), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:5(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BL), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:6(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BR), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:7(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, downmix, s32, 2304 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:8(eng): Data: none (tmcd / 0x64636D74) (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:26:04
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:00:00:00
    
Output #0, wav, to &#39;Left.wav&#39;:
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #0:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (FL), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #1, wav, to &#39;Right.wav&#39;:
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #1:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (FR), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #2, wav, to &#39;Center.wav&#39;:
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #2:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, mono, s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #3, wav, to &#39;LFE.wav&#39;:
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #3:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (LFE), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #4, wav, to &#39;Left_Surround.wav&#39;:
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #4:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (BL), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #5, wav, to &#39;Right_Surround.wav&#39;:
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #5:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (BR), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #6, wav, to &#39;Left+Right_Total.wav&#39;:
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #6:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, downmix, s32, 2304 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Stream mapping:
    
  Stream #0:1 -> #0:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:2 -> #1:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:3 -> #2:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:4 -> #3:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:5 -> #4:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:6 -> #5:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:7 -> #6:0 (pcm_s24le -> pcm_s24le)
    
Press [q] to stop, [?] for help
    
size=    8927kB time=00:01:03.48 bitrate=1152.0kbits/s    
    
video:0kB audio:71415kB subtitle:0 data:0 global headers:0kB muxing overhead -87.499863%

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