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Pvr-250 capturing glitch at 352 x 480 after upgrade to R5
http://forum.linhes.org/viewtopic.php?f=6&t=4402		 Page 1 of 1
Author:  axeldude [ Tue May 03, 2005 12:52 pm ]
Post subject:  Pvr-250 capturing glitch at 352 x 480 after upgrade to R5
I have a couple of computers with several PVR-250's (freestyle) and KnoppMyth installed. I upgraded one of them from R4V5 to R5A12 and started noticing jittery/glitchy playback; smooth for a few seconds, and then at a random interval (seems to depend on what is being captured) a frame will jump or jerk. Then I noticed that programs recorded before the upgrade played fine. It turns out that it is capturing video that way, but only at 352x480 resolution, which is what I use. If I change to any other resolution (although I didn't try all of them) it captures fine, but when I change it back to 352 x 480, the problem re-appears. I first noticed this with R5A12. (I tried to upgrade to R5A10, but for some reason, my PVR-250 cards were not recognized properly.) I upgraded MythTV to 0.17 on another box using apt-get with no difficulty and no problems, I did a new install with R5A15.1, and the same problem occurs. I noticed the entry "Patched tv_grab_au" in the change log for R5A12, and was figuring that this may be the cause. Could someone tell me more about this patch and perhaps how to unpatch to verify wether or not this caused the issue?
Thanks
Author:  axeldude [ Tue May 17, 2005 10:42 am ]
Post subject: 
I also did 2 fresh installs on other machines - same results. I found that if I set the Stream Type to MPEG-2 TS, the problem with the video goes away, but using MPEG-2 TS seems to create audio problems even at other resolutions. I downgraded one of the machines to R4v5, and once again am able to record perfect video at 352x480 DVD-Special 2 as before.
Author:  ceenvee703 [ Tue May 17, 2005 11:37 am ]
Post subject: 
I had the same problem with my PVR-x50s after upgrading (probably because I usually record at 352x480 as well). I found that upgrading my firmware fixes things.

http://mysettopbox.tv/phpBB2/viewtopic.php?t=3606

Note that you'll probably have to edit ivtvfwextract.pl according to this page:

http://www.digitalinsomniac.net/di/Main ... ding100504
Author:  shplad [ Fri Jun 03, 2005 12:42 pm ]
Post subject:  Freestyle info
Axeldude:

Which Freestyles do you have?

Mind if I ask what your ivtv config looks like? I want to add my Freestyle card to my already-installed PVR-150.

shplad
Author:  Xsecrets [ Fri Jun 03, 2005 2:23 pm ]
Post subject: 
well the tvgrab is not going to be the problem. it won't have anything to do with video capture. the problem is going to lie in the ivtv drivers. The R5 alpha series has the 2.0 ivtv drivers and R4V5 had a patched 0.1.9 I believe you can still download the 1.9, but you would have to patch it to compile on 2.6 kernel. or you could try some different versions of the 2.0
Author:  brendan [ Fri Jun 03, 2005 3:04 pm ]
Post subject: 
If the freestyle is newer than the pvr-{1,2,3}50s, it might be better to try one of the 0.3.5* releases of ivtv.

-brendan
Author:  shplad [ Fri Jun 03, 2005 11:30 pm ]
Post subject:  Mixing PVR Freestyle with PVR-150
Aw heck, I didn't even know you could use earlier drivers for those cards. As it is, I'm using 0.3.2s, so perhaps that will be late enough to get both cards working. Guess I'll just have to back up the drive, insert the Freestyle card and hope for the best.

Thanks gentlemen.

shplad

brendan wrote:
If the freestyle is newer than the pvr-{1,2,3}50s, it might be better to try one of the 0.3.5* releases of ivtv.

-brendan
Author:  marc.aronson [ Sat Jun 04, 2005 1:04 am ]
Post subject: 
I just upgrade to R5A16 and I haven't had this problem. I record at video=352x480, 2200kpbs; audio-224kbps@48KHZ. I'll check out a few more recordings and let you know if I'm seeing the problem...

Marc
Author:  marc.aronson [ Sat Jun 04, 2005 10:12 pm ]
Post subject: 
I did some more viewing of videos recorded on R5A16. While it does play well under VLC on my laptop, I discovered that the playback gets choppy when viewed through the MediaMVP Myth Front-end...
Author:  axeldude [ Thu Jul 28, 2005 2:31 am ]
Post subject: 
Thank you everyone for your posts. Sorry I didn't reply to any of them, and sorry I didn't get back to this forum earlier. I watched almost daily after the first post, wating for some response. After my second post, this issue was moved to the back burner, and I never got back to it until late June.
I tried the upgrade to R5A16, and saw little difference. Upgrading the firmware to Encoder revision: 0x02050032 extracted from pvr_1.18.21.22301_inf.zip seemed to take care of the problem. :)

Thanks again.

Axel
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