Questions about Interlacing

H

HazZY

Member
I was editing some clips of snowboarding today, and i always noticed the interlacing option in Sony Vegas 9, but never knew what it REALLY did. Now i am curious, what will get the best quality, interlaced every frame or interlaced every .25 seconds? Or neither, so i wanna hear some information about interlacing.
Thanks, HazZY
 
HazZY said:
I was editing some clips of snowboarding today, and i always noticed the interlacing option in Sony Vegas 9, but never knew what it REALLY did. Now i am curious, what will get the best quality, interlaced every frame or interlaced every .25 seconds? Or neither, so i wanna hear some information about interlacing.
Thanks, HazZY
Click to expand...

Uh?... I don't use Vegas, so I would not know what 'option' you are bringing up. But footage is either 'all' interlace, and was shot that way... or it is interlaced, but one of 24 p or pa was encoded into the format of the DV stream.

The parameters on 'interlace' usually are for odd/even field first, or in the case of 24p(a) from the DVX, a '(advanced) pulldown' removal.

On output one would worry about interlace if one was trying to create standard Broadcast media. For Computer display, interlace is not only meaningless, it introduces artifacts which most people notice during the playing of the movie, especially in scenes were there is a lot of motion.
 
I am a FCP user, but if you shot 30p, then it is in progressive so you don't need to worry about any interlacing. Unless you are mixing in some footage shot in 60i, then you'd need to de-interlace the footage...
 
HazZY said:
I was editing some clips of snowboarding today, and i always noticed the interlacing option in Sony Vegas 9, but never knew what it REALLY did. Now i am curious, what will get the best quality, interlaced every frame or interlaced every .25 seconds? Or neither, so i wanna hear some information about interlacing.
Thanks, HazZY
Click to expand...

That's not "interlace," it's "interleave," and it's about how to marry the sound into the video file. Has nothing to do with video interlacing or frame rates.
 
David Jimerson said:
That's not "interlace," it's "interleave," and it's about how to marry the sound into the video file. Has nothing to do with video interlacing or frame rates.
Click to expand...

Well that clears up something... and makes the .25 option more understandable...

I don't think I've ever really thought about setting the interleave factor for the output...
 
It's a render setting for AVI. "AVI," of course, stands for "Audio/Video Interleaved." There's really no reason to change it in the ordinary course of work.

Wouldn't really come up in FCP/Compressor when making Quicktimes. Nor does it come up for WMV, AVC, MPEG, etc.
 
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