[MEncoder-users] Fwd: Questions on Mencoder performace

[Matthias Wieser]

Am Dienstag, 6. Juni 2006 01:02 schrieb Phil Ehrens:
> larrystotler at netscape.net wrote:
> >  mencoder file -alang en -oac mp3lame -ovc xvid -xvidencopts
> > pass=1(pass=2:bitrate=1536) -o file
> >
> >  On my Xeon system, I get 49% CPU usage, but I can start 2 encodings at
> > one time. I generally get about 10 frames first pass, 5 2nd pass.
> >  On my P3-900, I get similar results. This mobile proc has 100Mhz
> > external bus
> >  On my CeleronM 2.4Ghz, I get 13-15 frames first pass and then 13-15
> > frames second pass.
> >
> > My questions are:
> >
> >  How much does L2 cache impact performance? Is 512k L2 a huge benefit
> > over 256k? Would a real P4 be better than the Celeron Mobile?
> >  How much does memory speed impact performance? Would switching the
> > CeleronM to DDR make a small or huge difference?
> >  How much does Hard Drive speed affect performance? I have a SATA and
> > SCSI 10k/80M/s drives in my Xeon, and ATA100s in the other 2
> > Are there further command line arguements that I need?
>
> None of these things will give you as big a performance boost as
> switching from xvid to lavc will.

xvid seems to to be faster than lavc for high quality encodings...