I have the same problem as Rabbit - really nasty horizontal lines with Live camera input. I also get this problem with some of my uncompresses .avi clips. Some of these were working fine until a few months ago they started producing these interlace type lines.
?????
Rodell
dv in problems
-
videoteque_
-
m. Taylan baysefer_
after long and painy tests,
we assume that if you are not working full res (on the show), working with dv creates lots of problems.
we are using composite or s-video in and we are reducing the resulotion to 320 * 240 which solves lots of headache.
about the nastly lines in video
it is occuring from the video-technique
you have to de-interlace the clips if you are going to use them as progressive.
if u didnt recored frame, normal video clip will be record as interlaced.
because of the video/television technique, frames are recored as interlaced. but like projectors, computer monitors etc. doesnt work with a fixed scan rate (projectors havent got a competible scan rate logic).
a video, if it is pal, it scans the screen 50 times per second. this means each frame has 2 fields. in ntsc only the numbers differ (60 times and frame rate is 30fps)
if you play the video on a tv, it seems ok if there is no problem with the field dominance. but if u play the same video clip on the computer monitor or projector, esspecially on high speed camera/object movements, you will notice the nastly, field, lines...
that nastly lines are occuring from this reason.
to solve, u can use a spesific hardware for deinterlacing (you connect the video to hardware and pass the video via the hardware to the computers capture input)
some capture hardware directly supports deinterlacing option while capture.
hope it helps.
cheers...
we assume that if you are not working full res (on the show), working with dv creates lots of problems.
we are using composite or s-video in and we are reducing the resulotion to 320 * 240 which solves lots of headache.
about the nastly lines in video
it is occuring from the video-technique
you have to de-interlace the clips if you are going to use them as progressive.
if u didnt recored frame, normal video clip will be record as interlaced.
because of the video/television technique, frames are recored as interlaced. but like projectors, computer monitors etc. doesnt work with a fixed scan rate (projectors havent got a competible scan rate logic).
a video, if it is pal, it scans the screen 50 times per second. this means each frame has 2 fields. in ntsc only the numbers differ (60 times and frame rate is 30fps)
if you play the video on a tv, it seems ok if there is no problem with the field dominance. but if u play the same video clip on the computer monitor or projector, esspecially on high speed camera/object movements, you will notice the nastly, field, lines...
that nastly lines are occuring from this reason.
to solve, u can use a spesific hardware for deinterlacing (you connect the video to hardware and pass the video via the hardware to the computers capture input)
some capture hardware directly supports deinterlacing option while capture.
hope it helps.
cheers...