After work today, I confirmed that recordings during the day when no one is watching previous material, record smoothly.
So the dropped frames are occurring during the record process, when something else is in the process of being played back on the PVR-350. Should I focus on the stripe set? Possibly a firmware issue. Now, that I think about it, I swapped out motherboards for a near identical model that supported a faster type of memory. I wonder if there is a problem with the slot I placed it in. How would I be able to determine whether the slot it is in is not a bus master? How about PCI latency in the motherboard's BIOS? ----- Original Message ----- From: [EMAIL PROTECTED] Date: Friday, September 1, 2006 9:06 am Subject: [ivtv-users] dropping frames every 3 seconds To: [email protected] > I have a Hauppauge WinTV PVR-350 (model 990) PCI adapter. > I've recently upgraded from IvyTV 0.2.0-rc3a and MythTV 0.16 > to IvtTV 0.4.6 and MythTV 0.18.1. I'm operating on a Slackware > 10.2 distribution with Linux kernel 2.4.31. > > I have had some problems with recordings since the upgrade. > Whenever a new recording is played back it skips video frames > roughly every 3 seconds, but for the most part the audio is > just fine. Older recordings that were made when the 0.2.0-rc3a > driver was installed, playback perfectly while operating under > 0.4.6 driver. I assume this means that the new recordings > were dropping video frames during the recording process. > > I seem to think that the system would make good recordings > for the first 3 minutes after a system reboot... so I tried > increasing the number of MPG and YUV buffers on the ivtv.o > modprobe line. Note, I don't use the modprobe.conf file. > Increasing the buffers, only seemed to increase the good > behaviour from 3 minutes to 4 or 5, before recordings > were dropping frames (after a reboot). > > I setup the driver according to my notes I posted here: > http://www.schaefer.dhcp.biz/pvr350tvout2.htm > > I also (generally) setup the MythTV 0.18.1 according > to my notes that I posted here: > http://www.schaefer.dhcp.biz/MythTV/myth18.htm > > Recently, I saw some threads for a patch to address some > runaway DMA issues, and tried applying that to a fresh > 0.4.6. After installing that, the system would crash all > over the place. I put the previous 0.4.6 drivers (without > the patch) back in place two nights ago, and noticed > last night the recordings made during the day (yesterday) > were perfect. After watching two of the shows from > yesterday, I played a recording that was made while I > was watching those shows, and it had the regular skips. > I kind of assume this means that the recordings are okay > as long as the adapter is not busy performing playbacks > at the same time. I won't have any time until tonight > to see if that is the case with today's recordings. > > One thing that I thought may have something to do with > this, that isn't MythTV or IvyTV related is: Under the > MythTV 0.16 I had a 8 GB primary master IDE drive for > the system disk, and then (3) 320 GB drives in a stripe > set. During the upgrade, I installed a 400 GB drive in > the primary master location, partitioned a 65 GB system > partition, and setup a stripe set among the (3) 320s and > the remaining drive space on the 400 GB. > > I don't suspect the difference in the stripe set to be > a problem, but it wouldn't be a surprise if it were either. > > What should I do next to troubleshoot this? > > > _______________________________________________ > ivtv-users mailing list > [email protected] > http://ivtvdriver.org/mailman/listinfo/ivtv-users > _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
