tv tuner/analog capture resolution problem

[cooldude859]

Okay, I am hoping someone has ran into this problem and knows how to solve it.

I have a cheap tv tuner/analog pci capture card. It's actually a decent card. It shows up as an OEM 7130ad in device manager, WinXP sp2

Anyway, it works as it should except that I can only capture at 320x240. If I attempt to capture at anything else the capturing programs will not do it.

I do not understand it. The chipset in this card is the saa7130 philips. It is supposed to support higher resolutions and I have heard of others capturing at bigger sizes.

What causes this and is there a way to overcome it?


I almost forgot to mention that so far I have downloaded drivers for various cards that use the chipset. I have successfully installed using different drivers but can never get anything more than 320x240 via composite.

[edDV]

Found this thread on your card. Try Avermedia capture drivers.
http://thegreenbutton.com/forums/217824/ShowThread.aspx
AverMedia DVD EZMaker Gold

[gll99]

What program are you using for capture? I have an older Avermedia tv98 tuner card and the "preview window" needs to be in "preview" mode and not "overlay or capture" mode otherwise I can't capture larger than 320x240. Changing this setting may allow up to 720x480 wth some cards. Some programs do this automatically but some like virtualdub do not, so it needs to be set manually. Knowing your exact capture tool might help in being more specific.

btw) If you are using an older legacy vfw application like virualdub they do not use wdm drivers directly and this may be your botttleneck. It uses a VfW-to-WDM mapper (or wrapper) to communicate between driver types. You should use a program that uses the wdm drivers directly for fullsize capture.

[cooldude859]

Thanks for the replies. The drivers actually worked better than the old ones. But, it did not solve the capture size problem. I use the latest Virtual Dub and disabling the overlay did the trick.

But, now I've entered the world of artifacts! Anything bigger than 320x240 causes motion lines in the video. I have tried deinterlacing and played with the fields. Also, I have tried the Disk i/o settings. Nothing changes it. I read something about pci latency. I went into the bios and made the pci slot into the master bus and raised the latency and then lowered the modem latency. It did nothing. I use yuv2 but changing that did nothing.

And ideas on this? Are the lines just there because of pc performance? If so, if I were to convert the file to DIVX and then burn it to play on my home dvd player, would the lines disappear?

[lordsmurf]

Those are not "motion lines". That's interlacing from the source. For a DVD, you'd leave it alone. I don't know why you'd want to convert to DIVX, you'll lose quality that way.