Hi,
Wiebe Cazemier schrieb:
But it still does not mean, that this is the same as your problem.
If you transcode png -> mpeg4 with mencoder, everything should be fine.
This makes things a lot more complicated. I was rendering to JPG with Cinelerra
all the time. But when I render to PNG and encode to xivd.avi, the resulting
image *is* too bright.
So, rendering to JPG and then encoding to xvid may result in a proper image,
but it would appear that this is by accident; mencoder seems to make movies
encoded from JPG frames darker.
How to the rendered images (png or jpeg) look like?
If they look both ok, it's mencoders fault. If the pngs look brighter, it's
cinelerras fault.
Rendering to PNG is very, very slow BTW. And it seems to hang during the
render, periodicly.
libpng is damn slow, that's not cinelerras fault. But png is still one of the
best codecs for computer generated images.
When encoding, mencoder says this:
SwScaler: BICUBIC scaler, from rgb32 to yuv420p using MMX2
SwScaler: using 4-tap MMX scaler for horizontal luminance scaling
SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling
SwScaler: using 1-tap MMX "scaler" for vertical scaling (YV12 like)
That's only info about how the image planes are scaled.
Also the first line? Scaling RGB32 to yuv420p?
You can scale yuv444p to yuv420p (which is done in this case).
But before, the RGB32 is converted to yuv444p, and that cannot
be done with a BICUBIC scaler.
Burkhard
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