interlace/de-interlace??

[donkthemagicllama]

I've been reading up in this forum and others, about creating SVCDs. I know this topic has been covered a lot, but I'm still questioning things.

I'm converting a video tape, which seems to have a 5 frame cycle where 2 of them are interlaced and one frame seems to be a duplicate. Not sure if this is telecine or not?

I captured at 720x480 with my AIW8500DV and VirtualDub. I captured with MJPEG @ quality setting of 19 (not enough space for 20 or huffy). No filters used.

I used TMPEGEnc to directly encode this, specifying interlaced source and destination. Using highest precision motion detect and two passes.

The result looks pretty good and is fairly smooth.

Just for kicks, I tried de-interlacing it using the MAP Deinterlace (you can get it from VirtualDub's website).

I encoded the de-interlaced version by frame-serving the avi from VirtualDub to TMPEGEnc, this time with the source and destination set to progressive.

Now, as I said, the original didn't look too bad. The file size between the two came out almost identical. I think the interlaced one *may* be a bit smoother, but I can't really tell for sure. However, in high motion scenes, the interlaced version is way blockier.

Thoughts??? I'm not sure what's best. I'm tempted to say the one I de-interlaced is better, but everything I've read says that I shouldn't de-interlace.

I should note that I'm playing this back on a standalone DVD player.

Am I doing something wrong with my interlaced version that's causing it to not look better as it should?

[andkiich]

I don't think that you would need to de-interlace at all. When converting from AVi to MPG, just make sure the field order for the file is correct. I was not able to notice if the conversion was correct until after the MPG file was authored and ready to be burned to DVD.

I'm not claiming to know a lot of information about this subject, but the info I provided is from reading many posts here on the subject and some testing on my own.

I hope this is some what informative and at least partially answers your question.

[txpharoah]

Leave interlaced source (tv, video tapes, commercial dvds, etc) as interlaced. Do not deinterlace. Read up at 100fps.com if you're interested in interlace theory.