Hello,

Anyone know how to de-interlace an AVI file with MediaStudio Pro 5.2? When I encode a captured AVI to MPEG, I can see the interlacing...

Thanks, Kevin

-- Kevin (delgadil@cisco.com), August 19, 1999

Answers

I would like to comment on this even though I do not use MSP5.2.

In premiere 5.1 one can select a de-interlaced output. With the LSX encoder one can select to de-interlace the input file.

Trouble with those options seems to be quite a loss in picture quality, infact the LSX encoder asks do you really want to de- interlace the input file yes/no?

I have been using a render out of premiere which is called "no fields" and that seems to a better choice as it provides a higher quality picture but does not get over the problem entirely. No idea what it really does though.

I have a commercial example of some bike riders passing left to right of the screen at high speed and there is no obvious interlace problem and the image is better than I can produce - how do they do that I wonder?

I have tried single field captures and they solve the interlace problem but at very high speeds the picture jerks - anyone know how to get the problem solved?

I wonder if it gets back to how it was taken? Wonder if fast shutter speeds improve the end result? Anyone know?

-- Ross McLennan (rmclennan@esc.net.au), August 19, 1999.

To de-interlace in MediaStudio 5.2 you right click on the clip in the timeline and from the pop-up menu select "Field Options" and if your project was setup to importing Field Order A or B video you should see a checkbox you can check to de-interlace. I just found this out myself a week or so ago. I've also discovered this VERY important fact which I have asked Ulead about but so far got no response. I have a Matrox Marvel G200 which captures field order B interlaced in 704x480 or 352x480. If I want to reduce the video to 352x240 and save it as frame-based I noticed that if I don't de- interlace then the video has an obvious "split" between the upper and lower halves, as if they used field A for the upper half and field B for the lower or vice-versa. Worse yet, is that to avoid this splitting problem I believe you have to first deinterlace and then output the result in the original size (x480) then bring it back in and output it x240 frame based. That is, de-interlacing as I described above then outputting to x240 does not seem to solve the splitting problem. I need to play with this some more but if you find a way around this let me know.

Hope this helps,

Mike

-- Mike (mediomuerto@hotmail.com), August 25, 1999.