[FFmpeg-user] Performance tuning FFMPEG under VMware

[Forrest Aldrich]

We have been running FFMPEG on real-iron hardware for a while; we're now
trying it under VMware VMs. I've noticed a performance degradation --
which I partially expected.

There are lots of folks out there running FFMPEG like this, in large
transcoding farms (Yahoo/Google?) so I'm hoping for some really useful
information.

If you have 2 cores and a max CPU speed of 3ghz, the speed is divided
between the two cores. So, does that make two cores more efficient than
one, at full speed?


Thank you in advance...


Forrest

[Henk D. Schoneveld]

We have been running FFMPEG on real-iron hardware for a while; we're now trying it under VMware VMs. I've noticed a performance degradation -- which I partially expected.
There are lots of folks out there running FFMPEG like this, in large transcoding farms (Yahoo/Google?) so I'm hoping for some really useful information.
If you have 2 cores and a max CPU speed of 3ghz, the speed is divided between the two cores. So, does that make two cores more efficient than one, at full speed?

1 core 20fps
2 cores 37fps
3 cores 44fps
4 cores 47fps

with 4 ffmpeg single core instances " -r 1” you’ll get 4 x 20 = 80fps.

Thank you in advance...
Forrest
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