Hello again, Am Mittwoch, 21. Januar 2009 schrieben Sie: > 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.
Well, in general, one core is nearly 50% faster than the old Athlon XP. And i have tested single- and multithread for xvid but still it is worse than my 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. I will try to compile it myself. Which parameters have you used? > > 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. Maybe i find a solution. > Use ffmpeg for mpeg4 encoding, it's much faster ;-) Thanks for your answer. Kind regards, Ronny Peine
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