Opened 3 months ago

Closed 7 weeks ago

#6708 closed enhancement (fixed)

support >16 audio bitdepth in decklink input

Reported by: dericed Owned by:
Priority: wish Component: avdevice
Version: git-master Keywords: decklink
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description

Summary of the bug:

The decklink SDK makes higher bit depth audio available, however only audio bit depth of 16 is accessible with the decklink input in ffmpeg. I propose a -raw_format_audio option or -audio_bit_depth, so that 24 or 32 could be selected. There is a comparable option in bmdcapture as -s, see https://github.com/lu-zero/bmdtools/blob/2c7c5bba81d4305bd4b8bcdc10f9a16026bfc7c7/bmdcapture.cpp#L640-L656.

How to reproduce:

ffmpeg-dl -h demuxer=decklink
ffmpeg version git-2017-09-29-3df437c Copyright (c) 2000-2017 the FFmpeg developers
  built with Apple LLVM version 9.0.0 (clang-900.0.37)
  configuration: --prefix=/usr/local/Cellar/ffmpegdecklink/HEAD-3df437c --disable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-nonfree --enable-decklink --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/include --disable-vda
  libavutil      55. 77.101 / 55. 77.101
  libavcodec     57.106.104 / 57.106.104
  libavformat    57. 82.102 / 57. 82.102
  libavdevice    57.  9.101 / 57.  9.101
  libavfilter     6.106.100 /  6.106.100
  libavresample   3.  6.  0 /  3.  6.  0
  libswscale      4.  7.103 /  4.  7.103
  libswresample   2.  8.100 /  2.  8.100
  libpostproc    54.  6.100 / 54.  6.100
Demuxer decklink [Blackmagic DeckLink input]:
Blackmagic DeckLink demuxer AVOptions:
  -list_devices      <int>        .D...... list available devices (from 0 to 1) (default 0)
  -list_formats      <int>        .D...... list supported formats (from 0 to 1) (default 0)
  -format_code       <string>     .D...... set format by fourcc
  -bm_v210           <int>        .D...... v210 10 bit per channel (from 0 to 1) (default 0)
  -raw_format        <int>        .D...... pixel format to be returned by the card when capturing (from 0 to UINT32_MAX) (default uyvy422)
     uyvy422                      .D......
     yuv422p10                    .D......
     argb                         .D......
     bgra                         .D......
     rgb10                        .D......
  -teletext_lines    <int64>      .D...... teletext lines bitmask (from 0 to 3.43597e+10) (default 0)
     standard                     .D......
     all                          .D......
  -channels          <int>        .D...... number of audio channels (from 2 to 16) (default 2)
  -duplex_mode       <int>        .D...... duplex mode (from 0 to 2) (default unset)
     unset                        .D......
     half                         .D......
     full                         .D......
  -video_input       <int>        .D...... video input (from 0 to 6) (default unset)
     unset                        .D......
     sdi                          .D......
     hdmi                         .D......
     optical_sdi                  .D......
     component                    .D......
     composite                    .D......
     s_video                      .D......
  -audio_input       <int>        .D...... audio input (from 0 to 6) (default unset)
     unset                        .D......
     embedded                     .D......
     aes_ebu                      .D......
     analog                       .D......
     analog_xlr                   .D......
     analog_rca                   .D......
     microphone                   .D......
  -audio_pts         <int>        .D...... audio pts source (from 1 to 4) (default audio)
     audio                        .D......
     video                        .D......
     reference                    .D......
     wallclock                    .D......
  -video_pts         <int>        .D...... video pts source (from 1 to 4) (default video)
     audio                        .D......
     video                        .D......
     reference                    .D......
     wallclock                    .D......
  -draw_bars         <boolean>    .D...... draw bars on signal loss (default true)
  -queue_size        <int64>      .D...... input queue buffer size (from 0 to I64_MAX) (default 1.07374e+09)

Patches should be submitted to the ffmpeg-devel mailing list and not this bug tracker.

Change History (3)

comment:1 Changed 3 months ago by cehoyos

  • Priority changed from normal to wish
  • Type changed from defect to enhancement

comment:3 Changed 7 weeks ago by dericed

  • Resolution set to fixed
  • Status changed from new to closed
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