#143: YUV video to RGB image export color conversion issue
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Reporter: peter_b | Owner:
Type: defect | Status: open
Priority: normal | Component: swscale
Version: unspecified | Resolution:
Keywords: RGB YUV color | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by peter_b):
I've checked [http://ffmpeg-users.933282.n4.nabble.com/YUV-video-to-RGB-
image-export-color-conversion-issue-td3330185.html the mailing list
archives], and the command line used was:
{{{
ffmpeg -vframes 4 -i 'testvideo_color_rectangles-YUV422P.avi' -pix_fmt
rgb24 -f image2 '%03d.bmp'
}}}
I've tried right now, and the error still persists: The colors are still
wrongly interpolated.
== FFmpeg version: ==
Git
[http://git.videolan.org/?p=ffmpeg.git;a=commit;h=2169f971ad9b582cc3f1e6a1430aad44d64495d3
2169f971ad9b582cc3f1e6a1430aad44d64495d3] (10 Jan 2012 06:15:18)
== Uncut output: ==
{{{
ffmpeg version N-36659-g2169f97 Copyright (c) 2000-2012 the FFmpeg
developers
built on Jan 10 2012 14:29:42 with gcc 4.4.5
configuration: --prefix=/usr/local --enable-gpl --enable-nonfree
--enable-postproc --enable-swscale --enable-avfilter --enable-pthreads
--enable-bzlib --enable-libmp3lame --enable-libvorbis --enable-libxvid
--enable-zlib --enable-libopenjpeg --enable-decoder=png --enable-
encoder=png --enable-libdirac --enable-libschroedinger
libavutil 51. 34.100 / 51. 34.100
libavcodec 53. 54.100 / 53. 54.100
libavformat 53. 29.100 / 53. 29.100
libavdevice 53. 4.100 / 53. 4.100
libavfilter 2. 58.100 / 2. 58.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 6.100 / 0. 6.100
libpostproc 51. 2.100 / 51. 2.100
Input #0, avi, from 'testvideo_color_rectangles-YUV422P.avi':
Duration: 00:00:00.40, start: 0.000000, bitrate: 868 kb/s
Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p, 720x576, 10
tbr, 10 tbn, 10 tbc
Incompatible pixel format 'rgb24' for codec 'bmp', auto-selecting format
'bgr24'
[buffer @ 0xa336f80] w:720 h:576 pixfmt:yuv422p tb:1/1000000 sar:0/1
sws_param:
[buffersink @ 0xa3385c0] auto-inserting filter 'auto-inserted scale 0'
between the filter 'src' and the filter 'out'
[scale @ 0xa330d80] w:720 h:576 fmt:yuv422p -> w:720 h:576 fmt:bgr24
flags:0x4
[swscaler @ 0xa3311c0] No accelerated colorspace conversion found from
yuv422p to bgr24.
[swscaler @ 0xa3463e0] No accelerated colorspace conversion found from
yuv422p to bgr24.
[swscaler @ 0xa34ae60] No accelerated colorspace conversion found from
yuv422p to bgr24.
Output #0, image2, to '%03d.bmp':
Metadata:
encoder : Lavf53.29.100
Stream #0:0: Video: bmp, bgr24, 720x576, q=2-31, 200 kb/s, 90k tbn, 10
tbc
Stream mapping:
Stream #0:0 -> #0:0 (ffv1 -> bmp)
Press [q] to stop, [?] for help
frame= 4 fps= 0 q=0.0 Lsize= 0kB time=00:00:00.40 bitrate=
0.0kbits/s
video:4860kB audio:0kB global headers:0kB muxing overhead -100.000000%
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/143#comment:9>
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