virtualdub + mpeg2 addon + filters = big mess

[svallarian]

This is a crosspost from the shspvr forums, so please excuse me if you read both.

'm capturing from VHS into a full resolution D1 mpeg2 file using a Hauppage PVR-150. As far was I can tell it only captures to mpeg2 and not avi.

The resulting file looks ok, but I'd like to run it through virtualdub to clean it up a bit.

So I download virtualdub, find out that it doesn't support mpeg2.
So I install the virtualdub mpeg2 version that does.

I add a deinterlacing filter and that wonderful VHS filter, and set it to output the results to an AVI file. (since virtualdub can't write mpeg2)

However, it's way out of sync with a ton of dropped frames.

So I try adding some compression, first Huffyuv, then pegasus

I've tried the pegasus compression filters, and am getting a 14
:1 compression ratio (and therefore a disk write of around 2MB/sec), but I'm still dropping 500-1000 frames of a 30 second clip.

This is from setting virtualdub to capture mode, setting the device to "disk file (emulation)", pulling in the 1GB mpeg2 file that I captured from the win2000 application and trying to export to the same disk using a deinterlacer filter and the vcr filter.

This is the input file coming from an external usb 2.0 hard drive and putting output to a 200GB internal drive.

btw, This is a 2.4 P4, 1GB ram.

[svallarian]

I was able to do the export last night by cutting off all of the audio sync options and basically letting the audio go way out of sync with the picture. This worked, with no dropped frames, but of course the audio was 5-10 seconds off. I'm thinking maybe I need to demux the audio from the mpeg2 stream and then put it back in to the cleaned up file???

I also tried capturing using a lower-bit rate mpeg2 stream, here's the results from that.

Captured using win2000 application
Quality level
MPEG2 2.0Mbit/sec

Saved file to a USB 2.0 external hard drive,
file size 16MB

Opened mpeg2 file in virtualdub mpeg2
capture mode
source as file (emulation), picking the file on usb drive
saving output avi to internal IDE drive

Results from running a test capture
Using Pegasus compression:

Frames Captured: 821
Total time :30
Disk space free 30.88GB
CPU usage 64%

Video
Size 102.8MB
Average rate 27.33333 fps
Data rate 3509KB/s
Compression 10.5:1
Avg frame size 131423
Frames Dropped 119

Audio
Size 5216KB
Relative Rate 46027.83Hz
Data rate 176 KB/s
Compression 1.0:1
VT adjust +1266856 ms
Resamples +0.000 s.t
Latency 0ms