Vegas 6 jumpy MPEG2 renders

AFSDMS wrote on 9/5/2006, 8:00 PM
Since I upgraded to Vegas 6/DVDA I've completed a couple projects. Editing is done in V6 and output DVDs via DVDA. Latest versions in all cases. Rendering is done with Main Concept MPEG-2.

The resulting video gets very 'jumpy' when pans or tilts occur. A close look shows that a single image will be kept for more than 1 frame. I could understand this if I was encoding at a low bit rate but, as I understood was recommended, I am rendering using the "DVD Architect NTSC video stream" settings. Average BPS is 6M with a Maximum BPS of 8M and a Minimum of 192k.

Looking at sections of the video from the DVD on a high quality Sony DVD player a frame at a time it looks like there will be four frames of movement then the last frame is repeated then four more frames of movement and then another repeat.

When I pull the MPEG back into a Vegas timeline and walk through a frame at a time I see three frames of movement then two frames that appear to be the overlay of two frames then next comes an overlay of two frames, then we're back to three normal frames of movement.

Could I have some project setting goofed up?

I do still have Vegas 4.0e installed and there were no issues that popped up when I installed Vegas 6.

Any help appreciated.

Wayne



Comments

farss wrote on 9/5/2006, 9:50 PM
At that bitrate you shouldn't be having issues, by any chance is the source material 24p? That almost sounds like pulldown form 24p, certainly not the sort of thing that usually goes wrong with encoded 50i/60i

Bob.
AFSDMS wrote on 9/6/2006, 11:12 AM
I went back and took another look. The scenes where the jumps are very obvious are short clips from a standard NTSC DVD where there is significant movement.

The scenes were selected and saved as .AVIs using VirtualDubMod. Then I dropped those clips into Vegas as events.

I don't know what tool to use to check the data format on the DVD. Perhaps there is a need to change some conversion setting?

A simple project just exposed a big hole in my knowledge here :-(

Wayne