[MEncoder-users] Experiences of video encoding

[Mathieu Monnier]

>  >    * qpel
> 
> This might be slightly detrimental unless your clips include scrolling 
> credits or something similar, in which case it will be slightly beneficial.

 From my tests, qpel is never good when encoding an unresized mpeg2 
source. By never good, I mean it actually lowers PSNR ( the test I made 
resulted in a 0.5 dB loss at same size ).

>  >    * umv
> 
> Does this have an effect? The man page says it's only for H.263+ and a 
> quick test showed no difference right now.

If there is to be a difference, it will be when there is a lot of motion.

Regards,

Mathieu