On Fri, 22 Jun 2001 10:01:03 -0400, "rvolin" wrote:

>I've read a heap about whether certain cameras have or don't have
>progressive scan, and what form it takes, but I'm still a little confused as
>to why I need it. Two questions: If I DO shoot in progressive scan mode,
>what does this give me in terms of video-look (I understand that it allows
>me to get better still shots), that I can't put in during post-production?
>If I DON'T shoot in progressive scan, what do I lose (again, besides better
>still shots), that I can't regain in post-production? In other words,
>besides still shots, what do I sacrifice forever when I shoot in progressive
>scan mode, and what do I sacrifice forever when I don't?

PS disadvantages:
- lower motion sharpness/smoothness
- lower still-image sharpness (PS-mode
shouldn't ideally, but often does,
reduce resolution of non-moving images)
PS advantages:
- frame-grabbed stills from the video
are free of interlace "comb" edges
on moving images
- some people seem to like the slightly
"jerky" look of PS-mode video (I don't
understand this...;-)
Interlaced disadvantages:
- none, other than the inferior quality
of stills captured from video of moving
images (when computer-video/streaming
videos are made, deinterlacing is easy,
so it is not necessary to do this while
shooting, damaging the original for
TV-viewing)
Interlaced advantages:
- smooth motion-rendering
- best sharpness for both moving and
still video images
Shoot interlaced, for most end purposes...