Hi,

Wiebe Cazemier schrieb:

Now about the video. I really don't understand how this is possible, but when I
encode the overly bright frames (where black is turned into RGB 15-15-15) with
mencoder, the encoded result is good, as in, black is black again. When I put
the mplayer window with the avi that did not go through Cinelerra, and the
window with the encoded rendered result over eachother, I can't see a
difference when I alt-tab them. When I do this with one of the rendered
frames, there is clearly a difference.

There is one potential issue, which could be involved here: The YCbCr formats
in MPEG and JPEG are differently scaled: In MPEG, the luminance is 16..235, in
JPEG it's 0..255.
Last time I looked, quicktime4linux didn't distinguish between them.
It can well be that mencoder doesn't get this right as well. The results
are images either too bright or too dark.

Burkhard

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