http://qa.mandrakesoft.com/show_bug.cgi?id=3172
------- Additional Comments From [EMAIL PROTECTED] 2003-03-12 05:35 ------- Using Thomas's kernel + mencoder recompiled has better performance, but not nearly what I used to have. I used to be able to (easily) get 30fps recording; when I first saw this problem after an update, it dropped drastically (it couldn't even sustain 15fps). Now it's pretty steady at ~20fps if nothing else is running, but can't do any better. If it makes a shred of difference, I'm using the following command, which has worked for months and months and months just fine: mencoder -tv on:driver=v4l:width=496:height=384:chanlist=us-cable:channel=3:norm=ntsc -oac copy -ovc lavc -lavcopts vcodec=mjpeg -endpos 02:20:00 Well, maybe this isn't a kernel problem and is really a library issue. I don't know: any ideas how to track it down? This computer tracks cooker more-or-less in real time. I don't just have old versions of everything lying around. =) Anyway, as far as this particular bug goes, 'cat /proc/interrupts' still shows only CPU0 getting IRQs (which still seems fishy to me) ... ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ------- Reminder: ------- assigned_to: [EMAIL PROTECTED] status: RESOLVED creation_date: description: This bug has been signaled on cooker mailing list, I signal it on behalf of Wesley J Landaker, who could not reach Bugzilla: > IO-APIC is enabled on my system, however all interrupts are routed to > CPU0. This didn't used to be the case, and I see a *drastic* > performance hit because of this (for instance, using mencoder to > capture real-time TV I used to get 35fps, now I can't even get > 20fps). It has been confirme by several people with different kernels: with standard kernel 2.4.21, I observed a very drastic performance problem with mencoder, encoding a video or TV, or encoding sound in oggvorbis (about 5 times slower). This happens also with the smp kernel, and this is even worse with the multimedia kernel.
