amd64 Mulitmedia performance

[Byron Poland]

Hi,

I've got amd46 Hoary installed on an amd64 3000 (socket 939, 90nm
chip).  I just put an air2pc hdtv (cvs dvb drivers) in the machine and
installed mythtv from source.  I'm able to record from the card fine,
but myth can't play back the files, mplayer results in horribly slow
files with no sound, and xine fares the best playing with sound, but
choppy video.

I transfered the same file to my athlon xp 2500 box which is running
Mandrake 10.1 + cooker stuff (only because I've been too lazy to
install ubuntu on it).  and the file plays in mplayer and xine
flawlessly.

using transcode's tcprobe here are the stats on the file:

[tcprobe] MPEG packetized elementary stream (PES)
[tcprobe] summary for 1029_20050228202300_20050228210000.nuv, (*) =
not default, 0 = not detected
import frame size: -g 1280x720 [720x576] (*)
     aspect ratio: 16:9 (*)
       frame rate: -f 59.940 [25.000] frc=7 (*)
                   PTS=38303.6703, frame_time=16 ms, bitrate=19000 kbps
      audio track: -a 0 [0] -e 48000,16,2 [48000,16,2] -n 0x2000 [0x2000]
                   PTS=38303.7511, bitrate=448 kbps
                   -D -4 --av_fine_ms -14 (frames & ms) [0] [0]

Next I'll try this file on my hoary install on my notebook with is a
2.4 ghz pentium m I think.

But I was wondering if anyone else has seen crappy multimedia
performance with amd64s.  I also did some trancoding over the weekend
with transcode, and it seemed overly slow.

for multimedia I am running with a nvidia card and nvidia drivers.