[FFmpeg-trac] #225(undetermined:open): Converting from YUVJ to YUV lose contrast
FFmpeg
trac at avcodec.org
Fri May 20 12:10:06 CEST 2011
#225: Converting from YUVJ to YUV lose contrast
------------------------------+---------------------------
Reporter: sghpunk | Owner:
Type: defect | Status: open
Priority: normal | Component: undetermined
Version: git-master | Resolution:
Keywords: YUV/YUVJ contrast | Blocked By:
Blocking: | Reproduced: 0
Analyzed: 0 |
------------------------------+---------------------------
Comment (by sghpunk):
Ok, I upload input file http://www.datafilehost.com/download-dfec691e.html
Output file: http://www.datafilehost.com/download-a3c7345e.html
And, yes with command line:
{{{
ffmpeg.exe -an -i input.mkv -qscale 2 low_contrast_yuv.mkv
}}}
The same problem, low contrast. Here is encoding log:
{{{
ffmpeg version UNKNOWN, Copyright (c) 2000-2011 the FFmpeg developers
built on May 19 2011 17:41:01 with gcc 4.5.2
configuration: --prefix=/mingw --disable-static --enable-shared
--enable-gpl --enable-version3 --disable-doc --enable-postproc --disable-
network --enable-memalign-hack --enable-libopencore-amrnb --enable-
libopencore-amrwb --enable-libmp3lame --enable-libspeex --enable-libvorbis
--enable-libx264 --enable-pthreads --enable-frei0r --extra-
cflags='-mthreads -mtune=nocona -march=nocona -msse3 -m80387 -mfpmath=387
-O2 -fgnu89-inline -Wno-error=missing-prototypes' --extra-ldflags='-Wl
,--enable-auto-image-base -Wl,--enable-auto-import' --extra-libs=-ldl
--cpu=nocona
libavutil 51. 2. 1 / 51. 2. 1
libavcodec 53. 5. 0 / 53. 5. 0
libavformat 53. 0. 3 / 53. 0. 3
libavdevice 53. 0. 0 / 53. 0. 0
libavfilter 2. 5. 0 / 2. 5. 0
libswscale 0. 14. 0 / 0. 14. 0
libpostproc 51. 2. 0 / 51. 2. 0
[matroska,webm @ 00b70280] Estimating duration from bitrate, this may be
inaccurate
Input #0, matroska,webm, from 'x264-low_contract_yuv_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: N/A
Stream #0.0: Video: mjpeg, yuvj422p, 1280x720, PAR 1:1 DAR 16:9, 24
fps, 24 tbr, 1k tbn, 24 tbc (default)
Incompatible pixel format 'yuvj422p' for codec 'mpeg4', auto-selecting
format 'yuv420p'
[buffer @ 003eff60] w:1280 h:720 pixfmt:yuvj422p tb:1/1000000 sar:1/1
[ffsink @ 00b604a0] auto-inserting filter 'auto-inserted scaler 0' between
the filter 'src' and the filter 'out'
[scale @ 00ba7e60] w:1280 h:720 fmt:yuvj422p -> w:1280 h:720 fmt:yuv420p
flags:0xa0000004
Output #0, matroska, to 'low_contrast_yuv.mkv':
Metadata:
MAKER : NIKON CORPORATION
MODEL : NIKON D90
CREATION_TIME : 2011-05-05 07:47:28
encoder : Lavf53.0.3
Stream #0.0: Video: mpeg4, yuv420p, 1280x720 [PAR 1:1 DAR 16:9],
q=2-31, 200 kb/s, 1k tbn, 24 tbc (default)
Stream mapping:
Stream #0.0 -> #0.0
Press [q] to stop, [?] for help
...CUT...
video:3980kB audio:0kB global headers:0kB muxing overhead 0.048334%
}}}
And result output file: http://www.datafilehost.com/download-12f6e2a2.html
I build ffmpeg myself.
--
Ticket URL: <https://avcodec.org/trac/ffmpeg/ticket/225#comment:4>
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