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How to convert 1080i to 50p?

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How to convert 1080i to 50p?
by Snowkite on Oct 30, 2005 at 8:14:08 am

I'm making an action sports film this winter using the Sony HDR-FX1 PAL. I've been experimenting with different ways of converting my interlaced footage to 50p for smooth slow motion. The best method I've come across so far is using AVI Synth in Virtual Dub to split the fields into frames. This yields great results, but I need to know if anyone knows of alternative methods of doing this? Also what resolution am I getting out of my 50p footage? I assume I'm getting SD resolution...

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Re: How to convert 1080i to 50p?
by Michael Slowe on Oct 30, 2005 at 3:47:02 pm

Why bother, why not adjust your motion speed in post? My Media 100 editing system provides wonderfully smooth motion FX and I'm sure others do also.

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Re: How to convert 1080i to 50p?
by Snowkite on Oct 30, 2005 at 6:26:59 pm

I've considered using Twixtor, but since I won't be time stretching any more than 200%, this seems like a waste of limited funds.

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Re: How to convert 1080i to 50p?
by aLexx on Oct 31, 2005 at 8:46:36 am

The easiest and fastes way:
In AfterEffects open a new composition. In Properties choose 50 fps instead 25. Import your footage and render it at 25p.Ready.
If you want to go higher than 200%, twixtor is the way to go...

alexx

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Re: How to convert 1080i to 50p?
by Gary Taylor on Nov 2, 2005 at 10:51:39 am

I you have access to Apple's Compressor 2 you might want to give it a try. I have heard great things about it and it can use motion vectors for it's calculations. One warning though, it is supposed to be very slow at the best settings.
Gary

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Re: How to convert 1080i to 50p?
by Nate Weaver on Oct 30, 2005 at 7:54:17 pm

I've done successful field to frame conversions from 60i to 24p in After Effects.

I had to watch out for line twitter in the final product, but I'd say overall, it worked.

New website, new work online:
http://www.nateweaver.net

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