On 01/23/2006 10:09 AM, Hans Verkuil wrote: >>On 01/10/2006 05:33 PM, Hans Verkuil wrote: >> >> >>>Upgrade to the latest ivtv-0.4.2 from the subversion repository. I think >>>this may well be the same bug as described in ticket 49 >>>(http://ivtvdriver.org/trac/ticket/49). With the latest 0.4.2 from the >>>svn repository you will see messages like this in the kernel log: >>> >>>ivtv1 warning: ENC: (0) DMA Error 0x0000000b >>> >>>and afterwards the sound may be gone. If you don't see these messages, >>>then it is something else. In that case try to test with a simple >>>'cat /dev/video0 >x.mpg' to see if you can reproduce it that way. >>> >>> Hans >>> >>> >>> >>I upgraded to 0.4.2 last weekend and my PVR-250 is generating those >>exact messages occasionally and I'm getting corrupt recordings. This >>started when I moved my PVR-250 card from a Dell 2.4GHz P4 to a AMD64 >>3400+ (not 64-bit). Last week's $160 experiment demonstrated it's not >>the VIA chipset on the Asus A8V Deluxe, as it also happens with a Asus >>A8N-SLI premium (nForce4 chipset). Details at >><http://ivtvdriver.org/trac/ticket/48>. >> >>The problem seems to happen more frequently when I do MythTV commercial >>detection while the recording takes place. Hmm....disks doing DMA, >>PVR-250 doing DMA...perhaps more contention? >> >>Anyway, what's one to do when a DMA error occurs? Is it possible to >>restart the transfer? >> >>I'd be happy to help in any way...the girlfriend is getting really >>ticked off... >> >> > >See ticket #49: it also has a workaround for this problem. Still no time >to look into this :-( > > Hans > >
Thanks, Hans. I read elsewhere on this list you're deeper than you wanted to be in other issues and I respect your prioritization of tasks. Keep digging, my friend, you'll get there! The good news: I've made a couple few recordings that look fine using PIO rather than DMA transfers. The bad news: 45% CPU utilization during recording at 720x480 6000-8000kbps on an AMD64 3400+ that, at priority -10, prevents smooth HDTV playback of other prerecorded material. Kinda negates the advantage of a hardware MPEG encoding card. :-) But hopefully this will get fixed in the near future...thanks in advance! Chris _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
