[mythtv-users] MythTV 0.17 & IVTV / PVR output problems

Derek Conniffe derek at rivertower.ie
Thu Dec 23 12:00:48 UTC 2004

Hi all,

I've just joined up to this mailing list and I've been playing with 
MythTV now for about a month.  I'm using SuSE 9.1 with a 2.4.28 kernel 
(SuSE 9.1 is normally a 2.6 kernel but I had problems compiling software 
- either lirc or IVTV I can't remember which) and I'm using a PVR 350 
for encodeing & playback.

I was having problems with MythTV 0.16 (current release) where the 
backend would hang once or twice per day.  I run gdb on mythbackend and 
I was able to view the back trace (Segmentation fault ......in memset () 
from /lib/i686/libc.so.6...from 
/usr/local/lib/libmythavcodec-0.16.so.0.....in ff_mpeg1_clean_buffers () 
from /usr/local/lib/libmythavcodec-0.16.so.0) but I couldn't find out 
any more information on it.  Also, if its of any importance, I could 
kill the frontend, and the maybe IVTV driver, by trying to pause live TV.

So I upgraded to MythTV CVS and the backend seems much more stable 
(never crashes itself) but now I have a problem with PVR 350 mpeg 
playback - if I  try to playback any recorded programmes the screen just 
stays black.  Sometimes when I try to fastforward/rewind I can bring up 
a garbled frame from the programme - sometimes some broken sound too 
(crackle, bleep, buzz, etc).

I can re-install the 0.16 MythTV and I'm back to the crashing backend so 
I can reproduce the 0.16 (crashing) and 0.17-CVS (no playback) problems 
over and over.

The /dev/video16 device seems to work fine - I can cat an mpeg recording 
to the device and it plays on the TV.   Having said this I am a bit 
suspecious that its something to do with the IVTV driver?  There are 
quite a few different IVTV versions (I'm currently running 0.1.9 from 
the ivtv sourceforge site but I have tried a couple of 0.1.10 pre 
releases too and I'm getting the same results - no different).

Any ideas or has any one else has these problems?  I'm not hung up about 
running the latest versions of anything and I'd like to get the MythTV 
box to the stage where my family could press remote buttons without it 
hanging :)




Derek Conniffe
Rivertower Ltd
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Email: derek at rivertower.ie
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