On Sun, Mar 29, 2009 at 10:25 AM, Brandon Jenkins <bcjenkins@xxxxxxxxxxx> wrote: > On Sat, Mar 28, 2009 at 11:27 PM, Andy Walls <awalls@xxxxxxxxx> wrote: >> On Mon, 2009-03-23 at 06:52 -0700, Corey Taylor wrote: >>> > Andy, >>> >>> > I am noticing an improvement in pixelation by setting the bufsize to >>> > 64k. I will monitor over the next week and report back. I am running 3 >>> > HVR-1600s and the IRQs are coming up shared with the USB which also >>> > supports my HD PVR capture device. Monday nights are usually one of >>> > the busier nights for recording so I will know how well this holds up. >>> >>> > Thanks for the tip! >>> >>> > Brandon >>> >>> Hi Andy and Brandon, I too tried various different bufsizes as suggested and I still see very noticeable pixelation/tearing regardless of the setting. >>> >>> I even upgraded my motherboard this past weekend to an Asus AM2+ board with >>> Phenon II X3 CPU. Still the same problems with the card in a brand new >>> setup. >>> >>> I also tried modifying the cx18 source code as Andy suggested and that >>> made more debug warning show up in my syslog, but still did not >>> resolve the issue. Haven't tried this yet with the new motherboard >>> though. >>> >>> Is it possible that this card is more sensitive to hiccups in the >>> signal coming from the cable line? Or interference from other close-by >>> cables and electronic equipment? >>> >>> When recording/watching Live TV through MythTV, I see that ffmpeg is >>> constantly outputting various errors related to the video stream. I >>> can post those here if you think it's relevant. >>> >>> Shoud I just return this card and get one with a different chipset? Or >>> do you think driver updates can solve the issue? >>> >>> I'm happy to hold on to this card if it means I can contribute in some >>> way to fixing the problem, if it's fixable : ) >> >> Corey and Brandon, >> >> I found a race condition between the cx driver and the CX23418 firmware. >> I have a patch that mitigates the problem here: >> >> http://linuxtv.org/hg/~awalls/cx18/rev/9f5f44e0ce6c >> >> I think the final form of the patch could be better. However, this >> patch essentially eliminated any artifacts I was getting playing back >> digital TV. I also had positive results running mplayer without the >> "-cache" command line for both digital and analog captures. >> >> I haven't tested on a single processor machine, nor in a multicard >> setup, but things looked good enough that I thought it ready for test by >> others. >> >> Let me know if it helps or not. >> >> Regards, >> Andy >> >> > Hi Andy, > > I have cloned this tree and loaded on the server. I'll let you know > over the next couple of days if there is any improvement. > > Thanks! > > Brandon > Andy, Based on continued discussions it seems you're still exploring things. I can tell you that the analog captures are still exhibiting artifacts. I'll get to some of the HD captures tonight. Brandon -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
