[FFmpeg-trac] #1426(undetermined:new): Colour space auto-selection does not work well for rgb48 input and yuv output
FFmpeg
trac at avcodec.org
Thu Jun 7 15:13:21 CEST 2012
#1426: Colour space auto-selection does not work well for rgb48 input and yuv
output
-------------------------------------+-------------------------------------
Reporter: cehoyos | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: git- | undetermined
master | Keywords:
Blocked By: | Blocking:
Reproduced by developer: 1 | Analyzed by developer: 0
-------------------------------------+-------------------------------------
Related to:
http://thread.gmane.org/gmane.comp.video.ffmpeg.user/37525
When encoding rgb48 with an encoder (like ffv1) that supports yuv at 16bit
but not rgb at 16bit, yuv420p16 is auto-selected instead of yuv444p16.
{{{
$ ffmpeg -i tests/lena.pnm -pix_fmt rgb48 out.png
...
$ ffmpeg -i out.png -vcodec ffv1 -coder 1 out.avi
ffmpeg version N-41334-g647e2e0 Copyright (c) 2000-2012 the FFmpeg
developers
built on Jun 7 2012 09:18:33 with gcc 4.3.2
configuration: --cc=/usr/local/gcc-4.3.2/bin/gcc --enable-gpl --enable-
libopenjpeg --enable-libvorbis --enable-libspeex --enable-libmp3lame
--enable-libtheora --extra-ldflags=-lm --enable-libvpx --enable-libxavs
libavutil 51. 56.100 / 51. 56.100
libavcodec 54. 24.100 / 54. 24.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 78.100 / 2. 78.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
Input #0, image2, from 'out.png':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, rgb48be, 256x256, 25 tbr, 25 tbn, 25 tbc
[buffer @ 0x9012040] w:256 h:256 pixfmt:rgb48be tb:1/25 sar:0/1
sws_param:flags=2
[ffmpeg_buffersink @ 0x9011fa0] No opaque field provided
[format @ 0x9012500] auto-inserting filter 'auto-inserted scaler 0'
between the filter 'Parsed_null_0' and the filter 'format'
[auto-inserted scaler 0 @ 0x9012420] w:256 h:256 fmt:rgb48be sar:0/1 ->
w:256 h:256 fmt:yuv420p16le sar:0/1 flags:0x4
stream->bits_per_coded_sample: 0, stream->extradata_size: 0
Output #0, avi, to 'out.avi':
Metadata:
ISFT : Lavf54.6.101
Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv420p16le, 256x256,
q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (png -> ffv1)
Press [q] to stop, [?] for help
frame= 1 fps=0.0 q=0.0 Lsize= 140kB time=00:00:00.04
bitrate=28654.4kbits/s
video:134kB audio:0kB global headers:0kB muxing overhead 4.147827%
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1426>
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