I’ve spent a rather frustrating month chasing down poor image quality in my simple vids made by trying to overlay and sequence short vids into a longer complex seqence. It turns out that sequencing in quicktime with the H264 codec is the cause of most of the problems:
This image shows that simply saving/ sequencing an image in the sequencer in png format (with the default 90% image size) even 4 times successively does not seem to cause any distortion.
This image shows that applying the texture to a plane (shadeless) and rendering to png also doesn’t seem to produce any distortion.
However, as this image shows, saving as quicktime with the h264 codec ( Best quality) distorts the image. I expected some bluring, but as you can see in the right half of the image, the effect that is most disturbing when this operation is repeated 4x is bad distortion of gamma. :x
Do you think this is worth making a bug report??
My advise is that when compiling several vids in the sequencer you use the individual image strips rather than saved vids. I’ll see if I can work out the gamma correction factor.