"avi drop frame" == "xvid N-vop"?

[plugh]

Running into some problems with a 720p TV cap and am contemplating pseudo-VFR as an option.

In my reading, I've come across seperate references to both terms - "avi drop frame" and "mpeg4 N-vop".

I know that N-vop is an mpeg4 construct, is "avi drop frame" some seperate container construct, or are they the same thing? Or is it possible to have both in a (NON packed bitstream) xvid avi file?

:confused:

Thanks!

[squid_80]

It's possible to have both. You're right about an AVI drop frame being a container construct, essentially it's a frame which has 0 bytes of data - so the only space it consumes is roughly 24 bytes. When a player/editor encounters one it should substitute the previous frame. They were originally conceived to keep audio and video streams in synch while capturing i.e. when the capture device "dropped" a frame a 0-byte padding frame was inserted as a replacement.

[plugh]

That clarifies some of what I've been reading.

:thanks: