[FFmpeg-trac] #8349(undetermined:reopened): Dolby AC-4 Support

[FFmpeg]

#8349: Dolby AC-4 Support
-------------------------------------+-------------------------------------
             Reporter:  Nomis101     |                    Owner:
                 Type:  enhancement  |                   Status:  reopened
             Priority:  wish         |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by Nomis101):

 Ah, sorry, the "0 channel" thing was just because of
 AV_CODEC_CAP_CHANNEL_CONF. If I add that to ac4dec.c I have sound with the
 sample files from above. So, it seems with this patch we are on a good
 way...


 ffplay /Users/Nomis101/Downloads/ABC\ Stream\ -\ FFmpeg\ bug\ \#8349.ts
 ffplay version N-100421-g1eb751955e Copyright (c) 2003-2020 the FFmpeg
 developers
   built with Apple clang version 12.0.0 (clang-1200.0.32.28)
   configuration: --pkg-config-flags=--static --enable-swscale --enable-
 avfilter --enable-fontconfig --enable-gpl --enable-version3 --enable-
 libass --enable-libbluray --enable-libfreetype --enable-libsoxr --enable-
 libaom --enable-libmp3lame --enable-librav1e --enable-encoder=librav1e
 --enable-libtheora --enable-libvorbis --enable-libvpx --disable-debug
 --enable-libmysofa --enable-libx264 --enable-libx265 --enable-libxvid
 --enable-nonfree --enable-libfdk-aac --enable-muxer=mov --enable-muxer=mp4
 --enable-muxer=ipod --enable-encoder=eac3 --enable-encoder=ac3 --enable-
 encoder=flac --enable-ffplay --enable-librtmp --enable-libsmbclient
 --enable-opencl --enable-libssh --enable-openssl --enable-encoder=truehd
 --enable-bsf=aac_adtstoasc --enable-encoder=h264_videotoolbox --enable-
 encoder=hevc_videotoolbox --enable-sdl --extra-ldflags=-L/opt/local/lib
   libavutil      56. 62.100 / 56. 62.100
   libavcodec     58.115.102 / 58.115.102
   libavformat    58. 65.100 / 58. 65.100
   libavdevice    58. 11.103 / 58. 11.103
   libavfilter     7. 93.100 /  7. 93.100
   libswscale      5.  8.100 /  5.  8.100
   libswresample   3.  8.100 /  3.  8.100
   libpostproc    55.  8.100 / 55.  8.100
 [mpegts @ 0x7fd2f082ac00] stream 3 : no PTS found at end of file, duration
 not set
 Input #0, mpegts, from '/Users/Nomis101/Downloads/ABC Stream - FFmpeg bug
 #8349.ts':
   Duration: 00:01:15.34, start: 12951.873511, bitrate: 3690 kb/s
   Program 3
     Stream #0:0[0x31]: Video: hevc (Main 10) ([36][0][0][0] / 0x0024),
 yuv420p10le(tv), 1280x720 [SAR 1:1 DAR 16:9], 59.94 fps, 59.94 tbr, 90k
 tbn, 59.94 tbc
     Stream #0:1[0x32](eng): Audio: ac4 (AC-4 / 0x342D4341), 48000 Hz,
 5.1(side), fltp
     Stream #0:2[0x33](spa): Audio: ac4 (AC-4 / 0x342D4341), 48000 Hz,
 stereo, fltp
     Stream #0:3[0x3a](ee`): Audio: ac4 (STPP / 0x50505453), 48000 Hz, 3.0,
 fltp
 [hevc @ 0x7fd308885c00] Could not find ref with POC 56
 13030.02 A-V:  0.019 fd= 174 aq=    0KB vq=    0KB sq=    0B f=0/0

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8349#comment:19>
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