How to distinguish between progressive and interlaced video?

[bozitaai]

Dear all,

What methods can distinguish between progressive and interlaced video?

When applying AVISynth script "ChangeFPS" or "ConvertFPS" in following VOB files and then encode them into H264 format, the output video quality aren¡¦t good at the VOB files which are extracted from Demonstration DVD 8.

And I want to ask that does the progressive or interlaced source affect the output video quality?

1. The 5th Element (SuperBit Version)
2. Demonstration DVD 8

Thank you very much!!

[Mug Funky]

if your copy of 5th elephant is any good, then it'll be progessive (you haven't said if you're in NTSC or PAL land... the NTSC one is probably in need if IVTC... search if you don't know:))

as far as demo DVD 8, i haven't the slightest clue.

to tell interlaced and progressive, really all you can do is look at it. flicking through a few frames doesn't take long to do, after all.

if you're just watching a DVD, then it'll probably be getting bob-deinterlaced on playback. in this case, you can tell interlaced from progressive by the smoothness of motion - pure interlaced will be twice as smooth as progressive. you get used to spotting it after a while.

[SeeMoreDigital]

Originally posted by Mug Funky
...if you're just watching a DVD, then it'll probably be getting bob-deinterlaced on playback. in this case, you can tell interlaced from progressive by the smoothness of motion - pure interlaced will be twice as smooth as progressive. you get used to spotting it after a while. I wonder what sort of display device bozitaai will be using to view both the source and the encode?


Cheers

[ukb008]

You can open your vobs in DVD2AVI. Advance frame by frame and you can see the serrations. Or start making a project; the info window will tell you whether it is progressive or interlaced.

Also read this (http://www.doom9.org/ivtc-tut.htm) landmark article. Although dated and desparately needing revision, it is still one of the best in the field. Pity the authors (one has left these fora, the other two probably can't get enough time to be together to work up a revision).

Regards.