[mythtv-users] DVB: Recording length keeps changing!!

[Jon Dye]

Paul McDermott wrote:
> Anyone else noticed this?
> 
> I've just been watching a recording. The "Watch recordings" screen tells
> me that it was recorded on Tues Jan 8, 6pm - 6.20pm. So it should be 20
> mins long.
> 
> When I start to watch and then press pause it tells me I have watched
> xx:xx of 17:22 minutes. If I press skip forward I then get yy:yy of
> 19:06. Later I see 15:37 of 15:37. The recording then ends abruptly at
> 17:22 of 17:22.
> 
> Anyone else seen this happening? Why does the recording length change?
> Why is my recording cut short? (NB This is a completed recording, not
> something that is still being recorded).

I've had this with a Nova-T card.  I discovered the problem was that the 
recording had errors in it which meant that at certain points in 
playback the length calculations were wrong which also meant that 
skipping forward and back went to the wrong place (e.g. instead of 30s 
forward I went 2mins back!).

Take a look at the log for your backend and see if you are getting 
warnings like this:
DVB#0 WARNING - Transport Stream Continuity Error.
if you are then your recordings are probably screwed!  I solved this by 
adding a kernel parameter when loading the dvb-ttpci module to increase 
the buffers:
modprobe dvb-ttpci buffers=4
(For the 1.0.1 dvb modules).

JD