Jerkiness in captures (not dropped frames)

[nerdfragger]

I'm using of of those $30 special Pinnacle PCTV Pro's to capture, and althouhg I am hardly dropping and frames, the video jerks around in medium to high motion scenes (suck as a slow pan with lot of people walking around). Is there any way I can allieviate this? I can use virtually any capture program, although I personally like virtualdub, so all tips apply for all capture software. Thank you all for the help!

AthlonXP 1.4Ghz (1600+) on MSI K7T266Pro2
512 MB OCZ PC2400DDR (2x256)
Dual WD400BB's in RAID 0 on EPOX RAID card
WD153BA capture drive (primary Master)
Teac 512EB(Secondary Master) Toshiba 1612 16x DVD (secondary Slave)
Radeon 8500 Retail
Pinnacle PCTV Pro
Soundblaster Live!
Windows XP (althouhg I also have Windows 98, and ME, so I can install those for a dual/tri boot if necessary)

[dphirschler]

I have almost the same system, PCTV Pro, AMD 1600 XP... no RAID configuration though.

If you are not dropping frames, then I suspect what you are noticing are the artifacts (or limitations) of 30 fps video/inverse telecining, or perhaps the limitations of mpeg compression. For instance, I have one scene in particular that is a slow pan. I've noticed that the AVI file displays it properly, but it is not nearly so smooth after mpeg encoding.


Darryl

[nerdfragger]

Actually, the avi files display this same error (pre-MPEG1 comversion). Thanks for the post though!

[widemouth13]

I had a similar problem caused by the interlasing field order, stills were fine but motion was very jumpy and even hurt the eyes to look at it.

In TMPEnc under Settings - Advanced - Field Order - change to the opposite setting from your current (either top or bottom).

Or when capturing in Virtualdub under Video - Format. Set the other field to be first.

May not be your problem but worth a try.

Chris.