To be or not to be ... deinterlaced?

[sweeper]

How can I check if a particular MJPEG-file is deinterlaced or not? I have MS and AvidCinema. I can't find where these programs tell me that?
Thanks.

[fluggo99]

They can't tell the difference, and it's certainly not recorded anywhere in the file.

That's why you have to specify what clips are field-A, field-B, and frame-based.

[Technoid]

That depends on how big your captured clip is:
352*288/320*240 (PAL/NTSC) not interlaced
704*576/640*480 (PAL/NTSC) Interlaced


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[This_Idiot]

More complicated than that Technoid. It's true that from 1/4 frame downwards Matrox treats all AVI as frame based. Not everyone does tho.

Also, although full and half-frame default (under Matrox) to field based, this can be overridden by the editing package.

And lastly, no matter which you capture in, the final rendering can be user-chosen and doesn't have to match the input type (OK, it's fairly suicidal to try, but it IS possible).

Of course, unless your final aim is output to VCR, interlacing (ie fields) is not overly useful

[DrMordrid]

As to when to use interlaced video, you need it any time the video is targeted to be displayed on an interlaced TV screen (99% of 'em now); VCR, VideoCD, SuperVideoCD, DVD....whatever.

When the target display is a computer or progressive scan display then the preferred mode is usually frame, but even then you might run into the need for interlaced video in some sequences because it handles fast motion better than frame video.

Dr. Mordrid



[This message has been edited by DrMordrid (edited 03 April 2000).]