[mythtv-users] mythtv/pvr350/australia

[Brian May]

Ok, an update:

>>>>> "Brian" == Brian May <bam at snoopy.apana.org.au> writes:

    Brian> * The on screen display is too big. I found adjustments to
    Brian> change the size of the menus, etc, but the OSD is still too
    Brian> big when watching TV shows. Is there any reason why? How do
    Brian> I fix this?

    Brian> Still an issue.

    Brian> * TV-in picture constantly shakes slightly up and down by 1
    Brian> or 2 pixels, consistantly. Otherwise, the picture would be
    Brian> perfect.

This was because the record resolution was set to low, after setting
it to 720x576 (in Setup --> TV Settings --> Recording Profiles --> *),
this problem went away.

    Brian> * I tried to configure channel 37 (for my VCR). ptune-ui.pl
    Brian> will switch to 37 fine, without any problem. mythtv wont
    Brian> let me select 37, even when I have the details in the
    Brian> database. Channel 35 works fine, but not 37. I am not sure
    Brian> what the problem is here.

    Brian> No solution yet.

    Brian> * It seems to be easy to crash mythbackend; One very
    Brian> reproducible way to crash it is to enter mythtv without any
    Brian> channels defined...  I have crashed it other times, but not
    Brian> yet found any obvious reasons.

    Brian> CVS probably fixes these issues.

I still get crashes in CVS (updated 20040326). On one crash, PVR350
input stopped working (but DVB was still OK). I had to reboot to fix.

The last crash happened after recording a DVB last night. It logged
lots of errors along the lines:

2004-03-28 23:58:57 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-03-28 23:58:57 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-03-28 23:58:57 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-03-28 23:58:57 DVB#0 WARNING - Transport Stream Continuity Error. PID = 7692004-03-28 23:58:57 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-03-28 23:58:57 DVB#0 WARNING - Transport Stream Continuity Error. PID = 769

And more, presumably when scanning for commercials:

Input #0, mpeg, from '/var/lib/mythtv//12001_20040328203500_20040329001000.nuv':  Stream #0.0: Video: mpeg2video, 720x576, 25.00 fps
  Stream #0.1: Audio: mp2, 48000 Hz, stereo, 256 kb/s
[mpeg2video @ 0x81e3e58]00 motion_type at 17 3
[mpeg2video @ 0x81e3e58]concealing errors
[mpeg2video @ 0x81e3e58]Warning MVs not available
[mpeg2video @ 0x81e3e58]invalid mb type in P Frame at 2 18
[mpeg2video @ 0x81e3e58]concealing errors
[mpeg2video @ 0x81e3e58]Warning MVs not available
[mpeg2video @ 0x81e3e58]concealing errors
[...]
[mpeg2video @ 0x81e3e58]concealing errors
[mpeg2video @ 0x81e3e58]concealing errors
[mpeg2video @ 0x81e3e58]concealing errors
[mpeg2video @ 0x81e3e58]slice mismatch
[mpeg2video @ 0x81e3e58]concealing errors

I would speculate that somehow the backend got confused when
processing the mpeg file which had errors (due to less then ideal
reception) and crashed. The movie is marked with a hammer (commercials
being flagged), so I think it is the flagging process that crashed it.

I might disable flagging commercials, see if that helps reliability. I
think it will. Flagging commercials isn't very accurate here anyway.

I am running the backend now as a foreground task, will see if it
comes up with segmentation fault or anything along these lines. If so,
I will try to reproduce the problem with full debugging information.

    Brian> * mythvideo doesn't work, mplayer complains the fb XServer
    Brian> doesn't have xv extensions. What are xv extensions?

    Brian> * Volume control doesn't work. I don't particularly care.

Volume control would be nice, considering the difference in volume
level between my two cards...

    Brian> * 2 second delay when changing channels; I suspect this is
    Brian> the time it takes to for the MPEG encoder/decoder to catch
    Brian> up.

    Brian> No solution for any of these.
-- 
Brian May <bam at snoopy.apana.org.au>