On Monday 14 April 2008 13:47, Burkhard Plaum wrote: > Hi, > > Wiebe Cazemier schrieb: >> I think mencoder does it right. > > According to this post it doesn't: > http://thread.gmane.org/gmane.comp.video.mplayer.devel/48261/focus=48270 > > 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. So, the question remains, why does Cinelerra do gamma correction? I can imagine difficulties when you're dealing with video drivers and preview output, but I can't see how this could happen in the rendering pipeline. And, how do I fix it? The only reliable, but klunky, way I know how, is to make a script which uses imagemagick's "convert" utility... Rendering to PNG is very, very slow BTW. And it seems to hang during the render, periodicly. > >> 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? _______________________________________________ Cinelerra mailing list Cinelerra@skolelinux.no https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
