Can't capure at 720x576!! Dropping frames...help!!!

[adhouse]

I have spent hours trying to capture with ATI AIW 128 Pro....with virtualdub.

I have a AMD Athlon 1ghz processor and when I capture, the cpu usage is only 60-70%. It drops frames at about 1 or 2 per second!

Please help. I have tried loads of things...
(I can capture fine at 640x576)

Thanks

Andy

[resnullius]

first off you'll never notice the loss of 1 or 2 frames per second. But if it bothers you that much you'll have to know alot more about your system... how fast is your hard drive, what's it's transfer rate ata33,ata66, etc. does your mother board support it? What peripherals could you deactivate for when you capture? BTW i remember reading somewhere that the aiw128 could only capture up to 640/480 anything higher was compensated by software... so it might not be all that usefull capturing at that size, you could see what the quality looks like if you enlargen the frames. oh yeah what kind of compression are you using(that can make a big difference)?

[adhouse]

thanks for the reply.

Ok...how do I find out the details you mention?

Whatever compression I use I get dropped frames - uncompressed, huffyuv, mjpeg etc. It is more than one or two per second after checking again...it loses about 30%.
Andy

[RHODK]

Hi adhouse
Open your --> Control Panel --> System --> Device Manager and there your harddrive's -->properties. Check whether DMA (direct memory access) or UltraDMA (UDMA) is enabled. If not you probably will solve your problem by enabling DMA/UDMA.
Regards, RHO

I have spent hours trying to capture with ATI AIW 128 Pro....with virtualdub.

I have a AMD Athlon 1ghz processor and when I capture, the cpu usage is only 60-70%. It drops frames at about 1 or 2 per second!

Please help. I have tried loads of things...
(I can capture fine at 640x576)

Thanks

Andy

If you are suck with a old motherboard with your CPU speed dose not matter. Hard info like you is real hard to find.

[adhouse]

OK. I have no option to enable/disable DMA as far as I can see. I am using XP and I don't think you can do it on XP. Is this right?

[resnullius]

to enable disable dma you do that in the bios

[FiEND]

control panel
system
hardware/device manager
IDE ATA/ATAPI controllers
primary and secondary IDE channels
enable dma

[resnullius]

o by the way, i just thought o this. i had a similar problem when i installed a new hard drive. the cause was that when i formatted the disk i enabled disk compression. seemed like a good idea t first but whenever i tried to capture the system slowed everything down to compress... not sure it'll help but wont hurt to check.

[circleking]

Mine is a bit different from FIEND's.
I'm using Windows98 SE.

control panel
system
device manager
double click disk drives
click settings
check the box that says DMA

[Bstansbury]

Adhouse, I've posted a "How to Tune" guide in the How TO section of the VCDHelp web page. It will give you all kinds of tips on how to fix your sys tem.

Hope this helps.

[$$$]

Another tip you might want to try: make sure your capture drive is defragmented. This was at least for me the solution to get rid of dropped frames. Also, give AVI_IO a try and you will get potentially less frame drops.

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