[FFmpeg-user] Strange results with delogo filter, maybe a bug

[sxe]

Hi,
i noticed that the delogo filter alter the output images color.
Not just the region i want to alter, the whole images.

Here is how i tested it:

Sample 1:
ffmpeg -i test.mp4 -r 1 -vf 'delogo=x=214:y=192:w=273:h=98:band=1'
test2/%03d.png
http://wstaw.org/m/2014/08/25/001_1.png

Sample 2:
ffmpeg -i test.mp4 -r 1 test2/%03d.png
http://wstaw.org/m/2014/08/25/001.png


You can compare the same image from both samples like this:
compare  -metric PSNR test/001.png test2/001.png difference.png
http://wstaw.org/m/2014/08/25/difference.png

but you can see it without that, one images has is slighty greyish tint.

Here ist he sample video i tested with: http://www.fileswap.com/dl/vf8t4Sjm0S/

I hope someone can help me.

Thanks