Bug#535200: gstffmpegcodecmap.c: fix to RGB24->I420 wrong color / endian problem
Harry Coin
harrycoin at aol.com
Tue Jun 30 17:05:04 UTC 2009
Package: gstreamer0.10-plugins-base
Version: 0.10.19-2
Severity: important
A webcam producing RGB24 was verified to produce accurate snapshots. However
outputting through ffmpegcolorspace to xvimagesink suffered wrong colors / bad
colors , specifically blue / red reversal as it gets converted to I420
colorspace. For instance:
gst-launch-0.10 -v v4lsrc device=/dev/video1 !
video/x-raw-rgb,width=640,height=480,bpp=24 ! ffmpegcolorspace ! xvimagesink
on little endian machines would always produce accurate images except for red /
blue being swapped. I noticed this first on Debian lenny and also in Debian
testing / squeeze
This fix corrects the issue.
--- gstffmpegcodecmap.c 2009-04-01 06:49:11.000000000 -0500
+++ /home/library/dvl/slidesaver/gstffmpegcodecmap.c 2009-06-30
11:21:06.000000000 -0500
@@ -695,7 +695,11 @@
}
break;
case 24:
+#if (G_BYTE_ORDER == G_BIG_ENDIAN)
if (rmask == 0x0000FF)
+#else
+ if (rmask == 0xFF0000)
+#endif
context->pix_fmt = PIX_FMT_BGR24;
else
context->pix_fmt = PIX_FMT_RGB24;
-- System Information:
Debian Release: 5.0.1
APT prefers stable
APT policy: (500, 'stable')
Architecture: i386 (i686)
Kernel: Linux 2.6.26-2-686 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages gstreamer0.10-plugins-base depends on:
ii libc6 2.7-18 GNU C Library: Shared libraries
ii libcdparanoia0 3.10.2+debian-5 audio extraction tool for sampling
ii libglib2.0-0 2.16.6-1+lenny1 The GLib library of C routines
ii libgstreamer-plugins-bas 0.10.19-2 GStreamer libraries from the "base
ii libgstreamer0.10-0 0.10.19-3 Core GStreamer libraries and eleme
ii libogg0 1.1.3-4 Ogg Bitstream Library
ii liboil0.3 0.3.15-1 Library of Optimized Inner Loops
ii libtheora0 1.0~beta3-1 The Theora Video Compression Codec
ii libvisual-0.4-0 0.4.0-2.1 Audio visualization framework
ii libvorbis0a 1.2.0.dfsg-3.1 The Vorbis General Audio Compressi
ii libvorbisenc2 1.2.0.dfsg-3.1 The Vorbis General Audio Compressi
ii libx11-6 2:1.1.5-2 X11 client-side library
ii libxml2 2.6.32.dfsg-5 GNOME XML library
ii libxv1 2:1.0.4-1 X11 Video extension library
gstreamer0.10-plugins-base recommends no packages.
gstreamer0.10-plugins-base suggests no packages.
-- no debconf information
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