[mythtv-users] PVR 250 problems
Mark Jacob
mjacob1 at san.rr.com
Mon Jun 9 13:28:13 EDT 2003
>
> 1. Is everyone experiencing frequent lock-ups with the PVR250 and if not what
> did you do to stabilize this?
Hard lockups (need to press the reset button) or application lockups? I
was having hard lockup problems when running a 2.4.20 kernel with low
latency scheduling and preemptible kernel patches. I switched to a
vanilla 2.4.20 kernel with the kraxel v4l2 patch and the hard lockups
went away.
> 2. In the past couple of days I've noticed the sound getting choppy/jerky and I
> 'm getting a error something like "Soundcard not reporting size correctly...
> reverting to old method". Not sure If I've had this error from the beginning but
> I don't think so. Could this be related?
Are you using ALSA? I have an SBLive! card and when using the oss
drivers the sound was terrible most of the time. I switched over to the
ALSA drivers last night and the audio smoothed out considerably. Now I
have to run a kernel compile and chew up all the CPU to get choppy
audio/video.
> 3. When using my PVR card on a windows box I noticed that It had only 3 or 4
> selectable bit-rates Anyone remember what those are and could this be related to
> the smaller bitrate=choppy/jerky problem?
>
I get video jitter (noticeable on the cnn crawler) no matter what the
bitrate. Experimental A/V Sync and jitter reduction do not seem to help
much either. I'm currently recording at 740x480 with bitrate=2500000 and
bitrate_peak=8000000.
Mark
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