ffmpeg and quad core

[rccollins]

I recently upgraded my CPU from a dual core to a quad core. Before the upgrade ffmpeg would use about 180% CPU. Now with the quad core it is only using 260% CPU, I was expecting around 380%. The rest of the system is Fedora 10, 2 gigs of ram, and a raptor hd. I am using -threads 0 as a parameter in ffmpeg. Anyone know how to get all four cores pegged?

[aedipuss]

you probably need to use 2 hard drives. a source and a destination. one reads and the other writes rather than one trying to do both simultaneously.

[deadrats]

I recently upgraded my CPU from a dual core to a quad core. Before the upgrade ffmpeg would use about 180% CPU. Now with the quad core it is only using 260% CPU, I was expecting around 380%. The rest of the system is Fedora 10, 2 gigs of ram, and a raptor hd. I am using -threads 0 as a parameter in ffmpeg. Anyone know how to get all four cores pegged?

silly question, have you tried -threads 4, -threads 6, -threads 8 and see if that does anything? it may be that ffmpeg is not capable of using all the available cpu resources with the encoding parameters you have chosen.

[rccollins]

silly question, have you tried -threads 4, -threads 6, -threads 8 and see if that does anything? it may be that ffmpeg is not capable of using all the available cpu resources with the encoding parameters you have chosen.

-threads 0 selects the optimal number of threads, so naturally -threads 8 makes no difference. I am able to use ~380% cpu however when encoding more than one file...