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Raterus
26th October 2006, 14:56
I'm trying to further my understanding of Progressive vs. Interlaced video, I know what both of those terms means, but I'm not sure how to tell what the current video I'm working with is.

I'm capturing video from my DV camera to AVI. How would I know if my AVI's are progressive or interlaced?

When I move on to encoding video to mpeg2, I really have three options for encoding: Progressive, Interlaced (Lower field first), Interlaced (Upper Field First). Again, based on the AVI's I'm using in the program, how should I know what to choose?

Thanks for any clarification you can provide!
Chainmax
26th October 2006, 15:18
DV video is always Interlaced BFF (lower field first) IIRC. In any case, you can know it by loading the video in VirtualDub and going frame-by-frame: interlaced video will exhibit black lines and progressive will exhibit a solid picture.
For more info, I suggest you to read Decomb's (http://www.neuron2.net/decomb/decombnew.html) readmes and tutorials, the IVTC tutorial (http://www.doom9.org/ivtc-tut.htm) and the capture guide (http://forum.doom9.org/showthread.php?t=78797). They have loads of very useful information about this subjet.
check
26th October 2006, 15:29
Another alternative is to use MeGUI's interlace analyser, it will detect all interlace types (progressive, interlaced, telecined, hybrid) and suggest appropriate filters to use.
JohnnyMalaria
26th October 2006, 16:14
DV video is always Interlaced BFF (lower field first)

Actually, the DV specification is neutral w.r.t. interlacing ( http://forum.doom9.org/showthread.php?p=888332#post888332 )

However, it is highly likely that the footage is interlaced unless the recording camcorder supports progressive scanning.
Chainmax
26th October 2006, 17:48
Actually, the DV specification is neutral w.r.t. interlacing ( http://forum.doom9.org/showthread.php?p=888332#post888332 )

However, it is highly likely that the footage is interlaced unless the recording camcorder supports progressive scanning.

Come to think about it, I have seen progressive content encode to DV. Thanks for the info :).