I'm building my first myth box. I've got most of the stuff working but I have this lingering problem for which I'd appreciate some help.<br><br>Video playback is choppy, with lots of "prebuffering pauses". The CPU is pegged at 100%, all of it on mythfrontend according to top. It's the same whether I play live tv or a recording. If I play with mplayer instead (either live on /dev/video0 or a recording made by myth), it's all smooth with the CPU at < 10%, big difference ! Searching the archives, I found references to possible sound problems, but I don't think that's the case here, I've tried to cripple my sound artificially by pointing mythfrontend to an alsa device that doesn't exist (and saying OK to continue with no sound), and the problem remains, choppy video, high cpu (and no sound of course).
<br><br>This is on an up-to-date gentoo, amd64 (Athlon 64 3000), 512MB, sata drive, PVR-150, video output to a CRT TV through S-Video on a cheap nVidia card. Latest nVidia driver (81.78), gentoo ebuild for mythtv (0.18.1-r1
).<br><br>Any clue where to look ?<br>Thanks<br> Vincent<br>