[MPlayer-users] Possible bug in BitMap OVerLay videofilter for MPlayer ?

[Olivier DOLE]

Hello,

I have tested mplayer bmovl video filter and it is working really fine in most 
cases. Nonetheless when I try to have a scrolling banner from right to left, 
I get a nasty bug. Here is the sample bash code I use (with a 1280x720 
video with option -vf bmovl=0:0:/tmp/fifo):

#!/bin/sh

for i in `seq 0 1280`
do
        (echo RGBA32 1053 39 -$i 681 -64 1; cat bandeau.rgba) > /tmp/fifo
done
echo HIDE > /tmp/fifo

when xpos<-227 (i.e video_width+xpos<image_width) you will see the bug.

you will find as an attachment, bandeau.rgba (the banner used for scrolling) 
to reproduce the bug and also a patch which seems to fix the problem. I think 
the patch needs more testing 'cause I have not tested all possible side 
effects.

Best regards,

Olivier DOLE
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