[FFmpeg-trac] #225(swscale:reopened): Converting from YUVJ to YUV lose contrast
FFmpeg
trac at avcodec.org
Sat Aug 31 23:37:04 CEST 2013
#225: Converting from YUVJ to YUV lose contrast
-------------------------------------+-------------------------------------
Reporter: sghpunk | Owner:
Type: defect | Status: reopened
Priority: normal | Component: swscale
Version: git-master | Resolution:
Keywords: YUV/YUVJ | Blocked By:
contrast | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by dtombs):
Yes, same issue. Here's the new log. I also upped the bitrate to avoid too
much quality degradation there bit it still looks bad.
{{{
ffmpeg version N-55933-g8da23be Copyright (c) 2000-2013 the FFmpeg
developers
built on Aug 31 2013 16:51:13 with gcc 4.7 (Ubuntu/Linaro
4.7.3-1ubuntu1)
configuration: --enable-vdpau --enable-libvorbis --enable-libvpx
--enable-zlib --enable-gpl --enable-postproc --enable-x11grab --enable-
shared
libavutil 52. 43.100 / 52. 43.100
libavcodec 55. 29.100 / 55. 29.100
libavformat 55. 15.100 / 55. 15.100
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 82.102 / 3. 82.102
libswscale 2. 5.100 / 2. 5.100
libswresample 0. 17.103 / 0. 17.103
libpostproc 52. 3.100 / 52. 3.100
Input #0, matroska,webm, from 'yuvj_input.mkv':
Metadata:
MAKER : NIKON CORPORATION
MODEL : NIKON D90
CREATION_TIME : 2011-05-05 07:47:28
ENCODER : Lavf53.0.3
Duration: 00:00:05.04, start: 0.000000, bitrate: 14463 kb/s
Stream #0:0: Video: mjpeg, yuvj422p(pc), 1280x720, SAR 1:1 DAR 16:9,
24 fps, 24 tbr, 1k tbn, 1k tbc (default)
[swscaler @ 0xc86040] deprecated pixel format used, make sure you did set
range correctly
[libvpx @ 0xcadc00] v1.1.0
Output #0, webm, to 'webm-low_contrast.webm':
Metadata:
MAKER : NIKON CORPORATION
MODEL : NIKON D90
encoder : Lavf55.15.100
Stream #0:0: Video: vp8 (libvpx), yuv420p, 1280x720 [SAR 1:1 DAR
16:9], q=-1--1, 1000 kb/s, 1k tbn, 24 tbc (default)
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg -> libvpx)
Press [q] to stop, [?] for help
frame= 121 fps=6.3 q=0.0 Lsize= 626kB time=00:00:05.04
bitrate=1016.6kbits/s
video:624kB audio:0kB subtitle:0 global headers:0kB muxing overhead
0.208650%
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/225#comment:21>
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