[mythtv] problem with HDTV in Australia

[Hamish Moffatt]

Hi. I'm attempting to watch HDTV recorded in Australia (on DVB-T).
The backend logs show that a test program was recorded fine (no DVB
errors reported). However when I play back the recording, the frontend
logs MPEG decoder errors continuously.

2005-07-28 23:11:37.252 Changing from None to WatchingPreRecorded
2005-07-28 23:11:37.253 Using realtime priority.
2005-07-28 23:11:37.377 Video timing method: SGI OpenGL
[mpeg2video @ 0xb7765010]ac-tex damaged at 68 21
[mpeg2video @ 0xb7765010]Warning MVs not available
[mpeg2video @ 0xb7765010]invalid cbp at 26 17
[mpeg2video @ 0xb7765010]ac-tex damaged at 51 39
[mpeg2video @ 0xb7765010]ac-tex damaged at 62 53
[mpeg2video @ 0xb7765010]invalid cbp at 58 40
[mpeg2video @ 0xb7765010]invalid cbp at 51 50
[mpeg2video @ 0xb7765010]ac-tex damaged at 54 37
[...]

I get a few of those every second or two. The picture breaks up briefly
every few seconds also. Sound is fine.

I posted two samples of the recording; being 1080i, the data rate is
very high. 5.7Gb for 80 minutes in total.

10Mb version: http://www.risingsoftware.com/~hamish/hdtv/shorthdtv.mpg
30Mb version: http://www.risingsoftware.com/~hamish/hdtv/shorthdtv2.mpg

This is recorded from channel 10 in Melbourne, for any Aussie readers.

The CPU (AthlonXP 2600+) is about 50% idle. (GF4MX440 video, using
Xv but not Xvmc.) Tried libmpeg decoding as well but it was no better.

I remember a discussion a while ago about separate PCR streams in
Australia that weren't recorded or used properly or similar. Is that the
problem here?


Hamish
-- 
Hamish Moffatt VK3SB <hamish at debian.org> <hamish at cloud.net.au>