On Sunday 13 April 2008 14:26, Andreas Hermann Braml wrote:

> Are you _sure_ the avi is "good"? Have you tried on another
> machine with different graphics card and/or with different
> player and/or OS to check? Otherwise it might only _appear_ that
> it's "good", where in fact it is not.
> I have a similar problem here, using the "intel" driver. When
> using mplayer, xv output is much too bright, might be gamma
> relatated as well. When I use gl or x11 as output method, it's
> fine. The display is fine when I use a player with a different
> backend (xine, gstreamer), e.g. Gxine or Totem, even using xv.
> 
> So at least check another player or another video output on
> mplayer.

I just made screenshots using the player "Xine". The black in the re-encoded
version is indeed #000, and it looks virtually the same as the original. I
really don't understand this. Even if there is something wrong with display
brightness of mplayer, it shouldn't display both movies with identical
brightness.

Check these frames (saved with low quality jpg, but that doesn't matter now.
Also, don't know if attachments are allowed, so I hosted them externally):

This is a screenshot from the original movie:
http://www.halfgaar.net/posts/2008-04/screenshot-from-original-movie

This is a frame rendered by Cinellera when I load the movie from above and
render without any modification, to jpglist.
http://www.halfgaar.net/posts/2008-04/frame-rendered-by-cinelerra

And when I reencode the overly bright images with mencoder, this is is the
result (a screenshot):
http://www.halfgaar.net/posts/2008-04/rendered-by-cinelerra-and-encoded-to-xvid-then-screenshot

The only thing I can think of, is that there is some kind of gamma info stored
in the jpg, but I don't know if that's possible, or how to check it.


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