multiprocessor optimisation,..

[Selur]

Would it be possible to optimise in some ways for SMP ?
(CPU usage while encoding with Xvid only lies at 55-65%, using newest avisynth as framserver)

Cu Selur

[Acaila]

That's not a problem of VDub/VDubMod, but of the filters and codec settings you're using. VDub balances ingoing and outgoing data between cpus, but when your ingoing or outgoing data requires more processing you'll see a shift to 50% cpu load. Without any filters and with 'light' codec settings you would get >90% cpu load, but the more (non-smp) filters/setting you use the less optimal it's going to run.

[dillee1]

wow, i have ask this question in divx forum ages ago and no body seems interested. now Mr. selur pull it up here :-)

I think due to the data dependance of those P/B frames, xvid codec inherently cannot split the job into multiple threads, as long as if we use vfw interface and deal with the problem frame by frame......

What I do to make use of all the CPU cycles is to manually split the encoding job into 2 parts, run each part in a separate instance of vdub. I got 80-100% speed boost, ~ 50fps on my dual pIII 1G rag.

[Selur]

@Acaila: Thx :)