On 2011-12-21 01:55:15 +0000, Måns Rullgård wrote: > Janne Grunau <[email protected]> writes: > > > On 2011-12-20 17:25:42 -0800, Ronald S. Bultje wrote: > >> > >> Missing #else fallback? (Can simply default to 1.) > > > > I had that first but it will break passing 0 to x264, although it may > > be a safe assumption that if our autodetection fails, x264 will also > > default to 1 thread. > > The best value for x264 is not the number of CPUs, and it knows better > what works best for the settings in use.
noted and solved > The number CPUs is also not always the best number of threads for us. > Especially frame-based threading benefits from having a few more threads > than CPUs. On 2 CPUs, 4 threads are often needed to fully saturate the > system. I'm using sched_getaffinity() now and will do some tests how threading scales up to number of cores * 2. I can test on dualcore with and without hyper threading and quadcore. Janne _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
