[mythtv-users] Where's the playback bottleneck?
anaerin at gmail.com
Wed Jan 25 01:31:36 UTC 2006
On 1/24/06, Jerry Rubinow <jerrymr at gmail.com> wrote:
> If I playback an HD resolution file, I get stuttering, pick a codec, any codec.
> If I play it back with mplayer (-vo xv -vc ffmpeg12), also stuttering.
> If I play it back with mplayer (-vo xvmc -vc ffmpeg12mc), plays back
> pretty much ok.
> In all cases, myth and mplayer, CPU is between 20% and 50% (this is on
> a combined front/backend, P4 2.8 Pundit, with onboard VGA disabled,
> using a PCI FX5200).
> The fact that I can playback the file in mplayer with xvmc, tells me
> it's not a disk issue, and the fact that mplayer cannot play it back
> smoothly with xv tells me it's probably not a myth issue.
> Is it a bandwidth problem in the video card or the bus? Some BIOS
> setting incorrect? Does anyone have any suggestions for how to narrow
> it down and tell for sure where the problem might be?
> Is anyone using an original (sis-based) Pundit for HD playback successfully?
If you can play back using mplayer (and XvMC), it means you can enable
XvMC in Myth and have smooth HDTV playback.
Robert "Anaerin" Johnston
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