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Bug 652

Summary: YUV to RGB conversion broken for odd widths
Product: SDL Reporter: Daniel Verkamp <daniel>
Component: videoAssignee: Sam Lantinga <slouken>
Status: RESOLVED WONTFIX QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2 CC: sezeroz
Version: HG 1.2Keywords: target-1.2.14
Hardware: x86   
OS: Linux   

Description Daniel Verkamp 2008-12-08 23:09:01 UTC 
Example of this problem is ffplay from FFmpeg:

Input to ffplay is bitmap at http://samples.mplayerhq.hu/bmp-files/test32bf.bmp (width = 127); ffplay internally converts to YUV and displays it (incorrectly) as http://drv.nu/stuff/ffplay-test32bf.png

Looks like one of the channels is misaligned.

Other ffmpeg tools and mplayer -vf format=bgr32 -vo sdl can convert or display this file correctly, so it seems to be a problem with SDL_DisplayYUVOverlay.

The ffplay source is available in FFmpeg SVN as ffplay.c

See also relevant FFmpeg bug http://roundup.mplayerhq.hu/roundup/ffmpeg/issue731

Tested with Gentoo amd64 media-libs/libsdl-1.2.13
Comment 1 Ryan C. Gordon 2009-09-13 16:33:07 UTC 
Tagging this bug with "target-1.2.14" so we can try to resolve it for SDL 1.2.14.

Please note that we may choose to resolve it as WONTFIX. This tag is largely so we have a comprehensive wishlist of bugs to examine for 1.2.14 (and so we can close bugs that we'll never fix, rather than have them live forever in Bugzilla).

--ryan.
Comment 2 Sam Lantinga 2009-09-27 15:04:50 UTC 
SDL 1.2 YUV code only supports even width and height.  You're welcome to submit a patch for SDL 1.3 however.