[MEncoder-users] Flashvideo for YouTube using mencoder

[Phil Ehrens]

Ben wrote:
> The keyframe will not be compressed harder or stronger, it
> deliberately holds more value to the codec and stream.
> The keyframe will be bigger in size than any other
> frame in the stream. Hence its quality will be higher.

This is totally wrong. If a keyframe is a zillion bytes,
and the next frame is zero bytes, both frames will appear
identical in every way when displayed as part of a video
stream. The second frame in this case would also be 100%
temporally innacurate, and therefore the stream would be,
technically speaking, highly lossy. But highly lossy does
not mean that there will be a perceived difference in
quality.