[FFmpeg-trac] #2407(swscale:new): Conversion from yuv to RGB leads to broken gradients and colors.
FFmpeg
trac at avcodec.org
Thu Mar 28 12:36:33 CET 2013
#2407: Conversion from yuv to RGB leads to broken gradients and colors.
------------------------------------+-----------------------------------
Reporter: sun | Owner:
Type: defect | Status: new
Priority: normal | Component: swscale
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
------------------------------------+-----------------------------------
Comment (by cehoyos):
I tested the following:
{{{
$ ffmpeg -i ffv1.avi -pix_fmt bgr24 out.bmp
$ ffmpeg -i ffv1.avi -pix_fmt rgb24 out.png
}}}
{{{
$ ffmpeg -i out.png -i out.bmp -map 0 -f framecrc -pix_fmt bgr24 - -map 1
-f framecrc -
ffmpeg version N-51338-g914f48d Copyright (c) 2000-2013 the FFmpeg
developers
built on Mar 28 2013 11:17:21 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl --disable-indev=jack
libavutil 52. 22.101 / 52. 22.101
libavcodec 55. 1.100 / 55. 1.100
libavformat 55. 0.100 / 55. 0.100
libavdevice 55. 0.100 / 55. 0.100
libavfilter 3. 48.105 / 3. 48.105
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, image2, from 'out.png':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, rgb24, 1920x1080, 25 tbr, 25 tbn, 25 tbc
[image2 @ 0x32c9440] Stream #0: not enough frames to estimate rate;
consider increasing probesize
Input #1, image2, from 'out.bmp':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #1:0: Video: bmp, bgr24, 1920x1080, 25 tbr, 25 tbn, 25 tbc
#tb 0: 1/25
#tb 0: 1/25
Output #0, framecrc, to 'pipe:':
Metadata:
encoder : Lavf55.0.100
Stream #0:0: Video: rawvideo (BGR[24] / 0x18524742), bgr24, 1920x1080,
q=2-31, 200 kb/s, 25 tbn, 25 tbc
Output #1, framecrc, to 'pipe:':
Metadata:
encoder : Lavf55.0.100
Stream #1:0: Video: rawvideo (BGR[24] / 0x18524742), bgr24, 1920x1080,
q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (png -> rawvideo)
Stream #1:0 -> #1:0 (bmp -> rawvideo)
Press [q] to stop, [?] for help
0, 0, 0, 1, 6220800, 0x43fb7af4
0, 0, 0, 1, 6220800, 0x43fb7af4
frame= 1 fps=0.0 q=0.0 Lq=0.0 size= 0kB time=00:00:00.04 bitrate=
14.0kbits/s
video:12150kB audio:0kB subtitle:0 global headers:0kB muxing overhead
-99.999437%
}}}
{{{
$ffmpeg -i out.png -i out.bmp -map 0 -f framecrc - -map 1 -f framecrc
-pix_fmt rgb24 -
ffmpeg version N-51338-g914f48d Copyright (c) 2000-2013 the FFmpeg
developers
built on Mar 28 2013 11:17:21 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl --disable-indev=jack
libavutil 52. 22.101 / 52. 22.101
libavcodec 55. 1.100 / 55. 1.100
libavformat 55. 0.100 / 55. 0.100
libavdevice 55. 0.100 / 55. 0.100
libavfilter 3. 48.105 / 3. 48.105
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, image2, from 'out.png':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, rgb24, 1920x1080, 25 tbr, 25 tbn, 25 tbc
[image2 @ 0x261c440] Stream #0: not enough frames to estimate rate;
consider increasing probesize
Input #1, image2, from 'out.bmp':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #1:0: Video: bmp, bgr24, 1920x1080, 25 tbr, 25 tbn, 25 tbc
#tb 0: 1/25
#tb 0: 1/25
Output #0, framecrc, to 'pipe:':
Metadata:
encoder : Lavf55.0.100
Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 1920x1080,
q=2-31, 200 kb/s, 25 tbn, 25 tbc
Output #1, framecrc, to 'pipe:':
Metadata:
encoder : Lavf55.0.100
Stream #1:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 1920x1080,
q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (png -> rawvideo)
Stream #1:0 -> #1:0 (bmp -> rawvideo)
Press [q] to stop, [?] for help
0, 0, 0, 1, 6220800, 0x03f17af4
0, 0, 0, 1, 6220800, 0x03f17af4
frame= 1 fps=0.0 q=0.0 Lq=0.0 size= 0kB time=00:00:00.04 bitrate=
14.0kbits/s
video:12150kB audio:0kB subtitle:0 global headers:0kB muxing overhead
-99.999437%
}}}
Is the problem reproducible with out.png but not out.bmp? Is there (also)
a problem with the conversion from rgb24 to bgr24?
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2407#comment:4>
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