#10616: jpeg gray 12bpp: use gray12 pix_fmt for decoding 12bpp gray files
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Reporter: ami_stuff | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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lossy:
https://trac.ffmpeg.org/raw-attachment/ticket/4683/12bpp.jpg
lossless:
https://trac.ffmpeg.org/raw-attachment/ticket/855/12_line.jpg
also currently -vlowres does not work correctly with 12bpp gray lossy
files
{{{
./ffmpeg -i 12bpp.jpg -y out.bmp
ffmpeg version N-112362-g4c422de1db Copyright (c) 2000-2023 the FFmpeg
developers
built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
configuration:
libavutil 58. 27.100 / 58. 27.100
libavcodec 60. 30.101 / 60. 30.101
libavformat 60. 15.100 / 60. 15.100
libavdevice 60. 2.101 / 60. 2.101
libavfilter 9. 11.100 / 9. 11.100
libswscale 7. 4.100 / 7. 4.100
libswresample 4. 11.100 / 4. 11.100
Input #0, image2, from '12bpp.jpg':
Duration: 00:00:00.04, start: 0.000000, bitrate: 65308 kb/s
Stream #0:0: Video: mjpeg (Sequential), gray16le(12 bpc,
bt470bg/unknown/unknown), 999x749 [SAR 300:300 DAR 999:749], 25 fps, 25
tbr, 25 tbn
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg (native) -> bmp (native))
Press [q] to stop, [?] for help
Output #0, image2, to 'out.bmp':
Metadata:
encoder : Lavf60.15.100
Stream #0:0: Video: bmp, gray(pc, bt470bg/unknown/unknown, progressive),
999x749 [SAR 1:1 DAR 999:749], q=2-31, 200 kb/s, 25 fps, 25 tbn
Metadata:
encoder : Lavc60.30.101 bmp
frame= 0 fps=0.0 q=-0.0 size= 0kB time=00:00:00.00 bitrate=N/A
speed=N/[image2 @ 0x55947d882f80] The specified filename 'out.bmp' does
not contain an image sequence pattern or a pattern is invalid.
[image2 @ 0x55947d882f80] Use a pattern such as %03d for an image sequence
or use the -update option (with -frames:v 1 if needed) to write a single
image.
[out#0/image2 @ 0x55947d882e40] video:732kB audio:0kB subtitle:0kB other
streams:0kB global headers:0kB muxing overhead: unknown
frame= 1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed=
0x
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/10616>
FFmpeg <https://ffmpeg.org>
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