[FFmpeg-trac] #7886(avcodec:new): Cineform decoder alpha channel regression
FFmpeg
trac at avcodec.org
Tue May 7 05:00:34 EEST 2019
#7886: Cineform decoder alpha channel regression
-------------------------------------+-------------------------------------
Reporter: mkver | Type: defect
Status: new | Priority: important
Component: avcodec | Version: git-
Keywords: cfhd alpha | master
regression | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Commit c64c97b972c7325a71440a352a7d541a8c92b2da has added support for
alpha channel decoding in Cineform HD (thereby fixing #6265), but commit
9cefb9e7ec508900ba147e6977590f03456aa15c broke it again (the function
process_alpha introduced in the first commit is now not even used any more
-- thanks to Clang for reporting this). The sample cineform_rgba_12b.mov
from #6265 now decodes as before c64c97b972c7325a71440a352a7d541a8c92b2da.
{{{
% ffmpeg -i cineform_rgba_12b.mov cin.git.master.png
ffmpeg version N-93777-g0b5c93b276 Copyright (c) 2000-2019 the FFmpeg
developers
built with clang version 9.0.0 (trunk 359932) (llvm/trunk 359941)
configuration: --disable-debug
libavutil 56. 26.101 / 56. 26.101
libavcodec 58. 52.101 / 58. 52.101
libavformat 58. 27.103 / 58. 27.103
libavdevice 58. 7.100 / 58. 7.100
libavfilter 7. 50.100 / 7. 50.100
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'cineform_rgba_12b.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2017-03-25T12:27:41.000000Z
Duration: 00:00:00.04, start: 0.000000, bitrate: 278876 kb/s
Stream #0:0(eng): Video: cfhd (CFHD / 0x44484643), gbrap12le(10 bpc,
bt709, progressive), 1920x1080, 76015 kb/s, SAR 1:1 DAR 16:9, 24 fps, 24
tbr, 24 tbn, 24 tbc (default)
Metadata:
creation_time : 2017-03-25T12:27:41.000000Z
handler_name : Apple Video Media Handler
encoder : GoPro CineForm
timecode : 00:00:00:00
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
stereo, s16, 1536 kb/s (default)
Metadata:
creation_time : 2017-03-25T12:27:41.000000Z
handler_name : Apple Sound Media Handler
timecode : 00:00:00:00
Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
Metadata:
creation_time : 2017-03-25T12:27:41.000000Z
handler_name : Time Code Media Handler
timecode : 00:00:00:00
Stream mapping:
Stream #0:0 -> #0:0 (cfhd (native) -> png (native))
Press [q] to stop, [?] for help
Output #0, image2, to 'cin.git.master.png':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
encoder : Lavf58.27.103
Stream #0:0(eng): Video: png, rgba64be, 1920x1080 [SAR 1:1 DAR 16:9],
q=2-31, 200 kb/s, 24 fps, 24 tbn, 24 tbc (default)
Metadata:
creation_time : 2017-03-25T12:27:41.000000Z
handler_name : Apple Video Media Handler
timecode : 00:00:00:00
encoder : Lavc58.52.101 png
frame= 1 fps=0.5 q=-0.0 Lsize=N/A time=00:00:00.04 bitrate=N/A
speed=0.0224x
video:8221kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7886>
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