vdub quality issues

[raveamoeba]

I recently got a capture card with the conexant Bt878 chip on it. When i use the software that came with it, the video quality is pretty good, but i wanted to use vdub to capture and the quality is horrid. Also, my computer has a Duron 800 and 512Mb DDR. I figured this should be enough to capture, but during normal play it is slighty choppy, and capturing is just completley choppy. Also can i use YUY2 with this chip? thanks guys.

[raveamoeba]

I recently found out about the BTwincap drivers, and installed those and switched to yuy2, i noticed that vdub looks a lot better, but now i cant capture audio and i am still dropping a lot of frames. any suggestions?

[raveamoeba]

i just tried flycapDS and it capture with no frames dropped at 320x240, but 640x480 had close to 100% frames dropped, and still no audio.

[rfmmars]

You have enought horse power, but if you are capturing .AVI format, you must make sure that your hard drive configuation is correct.

Is the DMA turned on? Are all the read / write chaches turn off?

Is the motherboard bios setup correctly for your hard drive. Is it a ATA 66 or better?

Playing a .AVI in Virtualdub will be choppy at best, I have found that Mpeg & Mpeg2 files will play fine if no plug-in are operational.

No audio? Too many things to cover.

richard
photorecall.net

[raveamoeba]

Is the DMA turned on?
i checked the dma status and 1 drive is PIO, and it is setup to use DMA if available, but i dont know how to change it
Are all the read / write chaches turn off?
i dont know how to check this?
Is the motherboard bios setup correctly for your hard drive. Is it a ATA 66 or better?
as far as i know, and yes :)

thanks for your help, thus far.

[rfmmars]

ATA 66 is the slowest of the fastest IDE drives, and thats what I used with a AMD 233 mhz cpu. Using a old Miro DC 30 I was able to capture at 4200 bps with is slighty above s-video quality with no dropped frames.

The newest ATA in think is 133 and even maybe higher. Use VD with less say the Xvid codec and see how high to can push the data rate. P10 should be one of the setting, and there should be others. not always is the highest the fastest.

The DMA is the most important. In Windows 95 & 98 It is set in the control panel under devices. Double click hard drives, double click each drive. Choose dma, but you will get a scarry message. Don't worry about it.

Reboot and see if the DMA has stuck. In Win2000Pro I think it is set automaticly. Have no clue for XP except it doesn't have the performance that Win2000Pro.

Hard Drives..... Western Digital is the poorest with IBM,Hatachi, and Maxtor are the fastest. Don't have any screen savers, or NOTHING running in the background, NOTHING!!!!!

When I started in the business there was no help, and the Internet was born, its was trial and error.

I no longer capture .AVI because .MPEG2 is so much eassier to capture and edit, and with a good capture board with ATI 9000 series, the capture is on par with a DV.avi.

If you need to render and burn DVDs your Duron 800 Mhz is not enough, I started with a AMD 1.3 gig Anthlon and that still easn't enought. 18 hours to render a one hour video. I have a AMD Barton 1.8 gig and a Intel 2.4 Gig. The AMD is slighly faster than the P4.

I hope you will be on your way to solving your problem. By the way, sometimes it's the VCR that causes the drop frames, bad shaped sync pulses.

richard
photorecall.net