[FFmpeg-trac] #8349(undetermined:reopened): Dolby AC-4 Support
FFmpeg
trac at avcodec.org
Fri Dec 18 02:32:56 EET 2020
#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):
FYI, with the patches applied from #13, the AC-4 streams from the samples
of #14 are properly detected as AC4. But the files do play with no sound,
because the channels are not detected (says "0 channels"). MediaInfo does
detect the channels as "5.1 Main" and "Stereo Main".
% 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
[NULL @ 0x7f81b782ce00] Decoder requires channel count but channels not
set
[NULL @ 0x7f81b7817000] Decoder requires channel count but channels not
set
[NULL @ 0x7f81b782da00] Decoder requires channel count but channels not
set
[mpegts @ 0x7f81b7808a00] stream 3 : no PTS found at end of file, duration
not set
[mpegts @ 0x7f81b7808a00] Could not find codec parameters for stream 1
(Audio: ac4 (AC-4 / 0x342D4341), 0 channels): unspecified sample rate
Consider increasing the value for the 'analyzeduration' (0) and
'probesize' (5000000) options
[mpegts @ 0x7f81b7808a00] Could not find codec parameters for stream 2
(Audio: ac4 (AC-4 / 0x342D4341), 0 channels): unspecified sample rate
Consider increasing the value for the 'analyzeduration' (0) and
'probesize' (5000000) options
[mpegts @ 0x7f81b7808a00] Could not find codec parameters for stream 3
(Audio: ac4 (STPP / 0x50505453), 0 channels): unspecified sample rate
Consider increasing the value for the 'analyzeduration' (0) and
'probesize' (5000000) options
Input #0, mpegts, from '/Users/polysom/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), 0 channels
Stream #0:2[0x33](spa): Audio: ac4 (AC-4 / 0x342D4341), 0 channels
Stream #0:3[0x3a](ee`): Audio: ac4 (STPP / 0x50505453), 0 channels
[hevc @ 0x7f81b886d200] Could not find ref with POC 56
[hevc @ 0x7f81b8814e00] Could not find ref with POC 32 0B f=0/0
[hevc @ 0x7f81b8814e00] Could not find ref with POC 24
[hevc @ 0x7f81b8814e00] Could not find ref with POC 16
13006.05 M-V: -0.025 fd= 305 aq= 0KB vq= 370KB sq= 0B f=0/0
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8349#comment:18>
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