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1hr NTSC to PAL sloooooows down for some reason?
I’ve got 4 tapes of NTSC footage to convert to PAL before I can edit it. Converting it isn’t a problem (Timewarp seems to do the job fine, and test clips have come out with no audio sync problems) but for some reason, when I render out, although AE starts off at a pretty good pace, it gradually slows down – to the extent that while it might have started off doing about 8-10 frames per second, it takes about 48 hours to get 40 minutes into the tape, and by this time is taking 5-6 seconds per frame. (And then windows update restarts the computer in the middle of the night… *AARGH!!*) I tried splitting the comp up into 5,000-frame chunks, and moving each chunk to the start of the timeline in case it was something to do with the length of the comp, but it doesn’t seem to have made any difference: the first comp (the first 5,000 frames of the tape) outputted in 22 minutes, the second one took about 44 minutes, and then I gave up.
Is there a better way of doing this so that I can convert all this footage before next Christmas? Any help would be very gratefully appreciated. I’m using “whole frames” rather than Pixel Motion, on CS3.
Thanks
Nick
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3 Replies
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Sounds like RAM is filling up, have you read about the “secret” preferences elswhere on the forum? look for the prefs with shiftkey held down and you’ll find a way to purge every x frames during render.
vanderzee.tv
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just curious if you’ve tried dropping the ntsc media into a pal comp, render and compared the difference to the timewarp version. timewarp can generate new frames between existing frames, but it seems to me that you really just need to remove frames, and this would do it. and i believe if you have ae separating fields already, timewarp is losing your second field data, which could be useful if you are scaling down the number of frames per second.
i think if the ntsc is properly deinterlaced (i think that separate fields with correct dominance and preserve edges with ae would be enough) that method should produce decent results and it should be much faster.
i’ve never tried to convert ntsc to pal, so this method may not produce good results. but if you haven’t tried it, it may be worth it to try. it should be significantly faster even if you reinterlace the pal at render.
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
that’s an interesting one, hadn’t thought of trying that. Just tested it with a random clip from the middle of the tape and it seems to have worked fine (I wouldn’t have expected it to conform the video & audio to 25fps but it has done). And thanks to Peter’s “purge” tip it’s not filling the RaM up any more either. Cheers both 🙂
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