On Tue, Mar 3, 2009 at 6:59 AM, St?phane T?letch?a <steletch at free.fr> wrote: > Since i have home a dual core cpu and inigo runs with two threads, i assumed > there was an auto-detection, but since i have here 2*4 cpus, i would like to > benchmark the rendering (in 64 bits mode). So far i have not found how to do > it in settings, the mailing list and the web site, is it possible atm? >
The launcher script from the Builder Wizard detects #cpus and sets an environment variable MLT_AVFORMAT_THREADS=n. You can also set threads=n as a property in a render profile. This thread count is not the overall thread count. It is the number of FFmpeg worker threads for video encoding (and decoding if using MLT_AVFORMAT_THREADS). Therefore, you might want to set this to #core -1 or -2. Also, it only works for some codecs; it works exceptionally well for x264. -- +-DRD-+
