View Full Version : 24pa flicker?
BrandonC
06-28-2005, 09:14 PM
I shot and edited my music video in 24pa, and the raw footage on the computer looks great, but when I render out in Premiere...a couple of clips (random) are very jittery...
What could be causing this? Some is smooth and some is very rough...even though the footage on the computer before the render is perfect.
Neil Rowe
06-29-2005, 06:52 AM
did you capture with scene detection on? are the clips affected with different effects?
Daygola814
06-29-2005, 09:22 AM
What exactly does Scene Detect do?
Sumfun
06-29-2005, 10:14 AM
I shot and edited my music video in 24pa, and the raw footage on the computer looks great, but when I render out in Premiere...a couple of clips (random) are very jittery...
What could be causing this? Some is smooth and some is very rough...even though the footage on the computer before the render is perfect.
Did you use a 24fps timeline? If you use 24p footage in a 30fps timeline, PP1.5 removes the 3:2 pulldown then adds its own which tends to make the video stutter.
BrandonC
06-29-2005, 04:14 PM
Yeah, I always edit in 24p timeline...
The entire video was shot in 24pa and it was shot over a couple months and I'd put the footage in when I got it...and it's only this latest footage that is stuttering.
It's really bizzarre.
i have exact same problem, however i shot in regular 24p......started a standard 48hz 24p timeline/project......captured it....rendered....exported......burned to dvd.....and watched it on tv.....and its SUPER jittery
i did double check to make sure it is on a 24fps timeline.....so whats goin on?
Sirius_Doggy
07-03-2005, 07:08 PM
Covered HERE. (http://www.dvxuser.com/V3/showthread.php?t=27880)
k, call me a retard or something i still cant get it to work...
1) i taped in 24p, not 24pa
2) opened up a standard 48hz 24p timeline//project
3) oepend capture window
4) checked the scene detect button
5) clicked 'next scene' button to goto the beginning of the 24pscene
6) clicked capture-tape
and yah, its still jittery.....is th ere something i missed? i read thru that article and that's the jist i got from it.
is it cuz i hav to shoot in 24pa?
Neil Rowe
07-04-2005, 07:10 AM
did you have to render the footage when you placed it on your 24p project timeline.. ? was there a red bar above it immediately? or was it just ready to go? . it works with 24pn or 24pa so it shouldnt matter as far as that goes really. it seems that there has to be a setting thats off or something done wrong somewhere.
Neil Rowe
07-04-2005, 07:16 AM
What exactly does Scene Detect do?
scene detect makes a new clip for each "scene" .. or in other words.. every time you hit record and then hit it again to stop recording.. thats a scene or shot. scene detection makes every shot its own clip instead of capturing it all as one big long clip. that way you can get rid of bad clips and only save good ones, and flag good shots and such. it also allows premiere pro to perform the 24p pulldown according to each clips cadance since they dont have to line up with eachother shot for shot on the time line.. for a quick explanation .. lets say that the 24pa cadance is 2:3:3:2 so thats the pattern that repeats. but one shot might end on the first 2. and the next shot would start upo again with the first 2. and each shot afterwards might not line up as well.. well premiere only looks at the cadance at the beginning of the clip and assumes it stays the same for the resat of your clip that you drop in the timeline. so if you capture as one long clip your pulldown is obviously going to be screwed up and youll start dropping progressive frames and savinginterlaced ones and such from shot to shot in the long clip.. if you use scene detect.. each shot is its own clip so ppro can detect the cadance for each new shot and remove its pulldown properly.. sides since you can dump all your junk shots its nice for saving room and flagging good stuff and is generally alot easier to work with individual shots on the timeline overall anyway.
Sirius_Doggy
07-04-2005, 12:03 PM
Desy - Any way you can post a few seconds of footage so we can see what the problem looks like?
actualli, i like recaptured the clip a bunch of times, one time it did have to be rendered, the other time it did not, i dont remember what setttings i changed
at the moment no, sorri i cant post up
the footage is realli jiterry when it moves, and u can see 'interlaced lines' here and there
this is just test footage by teh way, just me walking around the house testing the 24p, nothing important