Fwd: [MEncoder-users] Fwd: Questions on Mencoder performace

[larrystotler at netscape.net]

  >-----Original Message-----
 >From: Phil Ehrens <phil at slug.org>

 >None of these things will give you as big a performance boost as
 >switching from xvid to lavc will. Using '-oac copy' will also give
 >you a performance (and quality) boost. Good starting options for
 >lavc:

 >-lavcopts vcodec=mpeg4:nr=1000:mbd=2:v4mv:trell:vpass=N:vbitrate=1800

 >You will want to look into the docs for using cropdetect as well.

  How well does lavc work on slower machines? When you get right down to 
it, it has to play on a slower machine, so if faster re-encoiding 
results in a file that won't work as well on a slower machine, then 
I'll stick with slower encoding. I also usually look for wide screen 
since I use them with a projector as well.

  As for '-oac copy' that just copies the MP2 audio. That would make the 
file size larger than using MP3,correct? Will that work better on a 
slower system?

  A friend has a P4 Xeon 2.8Ghz, and he gets around 50 first pass and 
25-30 second pass. That's why I am wondering. We haven't been able to 
check since his system is a Xeon and mine isn't....
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