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bugeyes
12th February 2008, 06:02
Hi.
I capture videos from cable TV using a BT-878
based card and VirtualDub 1.4.9.2 (VirtualDubVCR)
placed on the same directory of Modified
VirtualDub installed by GordianKnot.

The VirtualDubVCR has an excellent timer.

I normally capture with audio mono 44100
uncompressed, video compressed with
PICVIDEO MJPEG at level 19 and I was getting about
25% to 50% CPU usage and only 2 frames lost
in more than 180 min capturing at 29.9697 fps
at 640x480.

From some moment on I'm getting, 100% of CPU
usage, with the same settings, more frames
lost and sometimes I do not get to the endo of
the capture. The computer hangs and I must restart it.

I've tryed lots of changes, like no audio, no video
compression, reinstall capture card and video card,
but I keep getting 100% CPU usage and loosing
some captures.

Do someone have an idea about what's happening?

Thanks for the help
jeffy
12th February 2008, 07:01
HDD in PIO mode?
http://winhlp.com/node/10
frogno1
13th February 2008, 14:44
What's the HDD interface type you used?
bugeyes
14th February 2008, 05:43
I checked DMA. It's OK
Disabled and reenabled in BIOS and in WINDOWS.

I checked HD speed with VDub 1.4
I got Driver sustained speeds of 188 MB/s read and 26.5 MB/s
write. My capture give a data rate of 2.9 MB/s.So I think
it's not an HD limitation.

My normal capture is with 640x480 RGB 15. This gives a bitrate of 18 MB/s (compression 6.6 ~= 3 MB/s to drive).
I tested YUY2 with the same problems.
The things got worse when I tryed RGB24, as expected.

Hope some light
mgh
14th February 2008, 06:46
try rgb32!
setarip_old
14th February 2008, 08:11
@bugeyes

Hi!From some moment on I'm getting, 100% of CPU
usage, with the same settings, more frames
lost and sometimes I do not get to the endo of
the capture. The computer hangs and I must restart it.Sounds like your system is overheating. Try opening it up and cleaning out all dust bunnies and grease (particularly, clean fans thoroughly). Make certain all components are properly seated and all wiring securely connected...
jeffy
14th February 2008, 09:45
I checked DMA. It's OK
Disabled and reenabled in BIOS and in WINDOWS.

I checked HD speed with VDub 1.4
I got Driver sustained speeds of 188 MB/s read and 26.5 MB/s
write. My capture give a data rate of 2.9 MB/s.So I think
it's not an HD limitation.


Was this always so low? 26.5MB/s write??