Am Dienstag 20 Januar 2009 schrieb Ronny Peine: > i often transcode recordings from my tv card and i am using avidemux > to cut and then transcode it to xvid. After doing this for years on > Gentoo, i knew that it gives about 7 fps in the second pass with my > settings for an mpeg2 video in 720x576 resolution as input. I now > tested this same scenario on my laptop with OpenSUSE 11.0 x86_64. My > Laptop has a Core 2 Dou with 2.1 GHz. My Gentoo machine is an old > Athlon XP 2600+ (1.9 GHz). So i expected at least about 2 or 3 times > the performance for my laptop compared against my old machine in > transcoding. But on the laptop it was only about 6 fps with the exact > same settings, which made me curious. I tried to reproduce this with
When there's used only one core, I don't think the Core2Duo is (much) faster then the Athlon XP. > the cmdline tool transcode to eliminate the possibility that it is > tied to avidemux. With transcode i get the same bad performance. I > also eliminated filters and audio encoding, still bad performance. So > xvid is the culprit. Using no export formats lead to a very fast > decoding of the mpeg2 with 420fps in transcode, so the decoding part > is not the problem. Are there any misoptimizations in xvid or > something like this? I've got reports that xvid 1.2 is slower the 1.1, but there's no difference in the parameters I've used to compile it. > Following interesting packages (all from PackMan-Repo) are installed > on my OpenSUSE laptop: > xvidcore-1.2.1-0.pm.0 > xvid4conf-1.12-0.pm.1 > libxvidcore4-1.2.1-0.pm.0 > > all packages are x86_64. > > Do you know a possible fix for this? Sorry, I don't know, how to change it. Use ffmpeg for mpeg4 encoding, it's much faster ;-) -- Machs gut | http://www.iivs.de/schwinde/buerger/tremmel/ Manfred | http://packman.links2linux.de/ _______________________________________________ Packman mailing list [email protected] http://lists.links2linux.de/cgi-bin/mailman/listinfo/packman
