[gstreamer-bugs] [Bug 512345] gstalpha: chroma-key should not set alpha to 0 if brightness is near maximum or minimum

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-good | Ver: HEAD CVS




------- Comment #4 from Sebastian Keller  2008-01-28 22:23 UTC -------
Created an attachment (id=103916)
 --> (http://bugzilla.gnome.org/attachment.cgi?id=103916&action=view)
some pictures showing the problem

First I modified my patch a bit for these pictures, since it was causing some
problems with videotestsrc, it just checks for (y11 >= 225 || y12 >= 225 || y21
>= 225 || y22 >= 225) now.

The command i used for testing:
gst-launch-0.10 \
videotestsrc ! "video/x-raw-yuv, width=360, height=296,
framerate=(fraction)15/2" ! ffmpegcolorspace ! \
alpha alpha=0.0 method=blue angle=50 noise_level=0 ! videomixer name=mix !
ffmpegcolorspace ! ximagesink \
filesrc location="/usr/share/pixmaps/backgrounds/gnome/nature/FreshFlower.jpg"
! decodebin2 ! \
ffmpegcolorspace ! videoscale ! "video/x-raw-yuv, width=360, height=296" !
ffmpegcolorspace ! mix.

(simply replace videotestsrc with v4lsrc for webcam)


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