[MPlayer-dev-eng] [LONG] PSNR comparison, new source and results

[Jan Knutar]

On Wednesday 16 June 2004 17:08, Michael Niedermayer wrote:

> one possible explanation is that at a bitrate similar to the source
> bitrate we are really trying to store the mpeg2 compression artefacts
> and mpeg4-hpel is better then mpeg4-qpel at storing mpeg2-hpel
> it would be interresting to see if the psnr decrease at high bitrates
> exists for uncompressed sources too ...

Hm, indeed! Unfortunately I have no good source of uncompressed video 
:-)  Most television seems to be mpeg2 these days too. :-( My webcam 
has lovely Bayern-RGB artefacts though, I'm going to see what qpel does 
with that next... :-)

FYI, the mpeg2 stream I was re-encoding had an average bitrate of 
7000kbit (yes, ~7 mbit) (as measured by mencoder -ovc copy -nosound ).