[mythtv-users] Preserving HDTV AC3 audio stream whilst transcoding

[Kyle Rose]

Stephen Hocking <shocking at houston.rr.com> writes:

> Just out of curiousity, what speed CPU are you using, and what video card? I'm 
> trying all this with an AMD XP 2400+ and a Nvidia FX5200.

Pentium4 3.2, same video.

> There's also a post on the devel list refering to some work done by other
> people on a fast MPEG2 decoding algorithm. They were able to get 62fps
> from a 720p stream on a 933MHz P3 with a Geforce 2 MX440. If we could
> do something similar with the MythTV MPEG2 decoder, I suspect that a
> lot of my problems would go away. Even using the pcHDTV people's Xine
> tweaks (which I think use the XvMC Nvidia specific extension) would be
> a big help.

I use simple Xv, not XvMC, and still see > 50% CPU usage on HT this
processor.

Just replacing the myth engine with whatever xine uses would drop CPU
usage by at least 30%.  I don't know why myth is so slow; whenever I
bring this up, Isaac either ignores it or just says it's the same code
and refuses to admit there's a problem.

Kyle