15 frames to 24 frames

MoBetta wrote on 6/19/2004, 10:35 AM

I shoot 15 frames progressive on a Sony PDX-10 directily on to a Nnovia drive, but I want to convert to 24 frames progressive. I've done 30 frames to 24, not a problem, but this would require creating additional frames... Anyone knows of any software that can do this conversion??

Thanks

MoBetta

Comments

filmy wrote on 6/19/2004, 11:16 AM

Try Vegas with Supersampling turned on. Try a setting of 2 or 3 to start with and see how that looks.

MoBetta wrote on 6/19/2004, 2:03 PM

...didn't think of that. I'll give it a try and let you know.

Thanks

joelaff wrote on 6/19/2004, 2:08 PM

You may also what to check out Twixtor from RevisionFX, and ReTimer from RealViz. Also, I think Algolith is coming out with a time stretcher program/plug as well.

Chienworks wrote on 6/19/2004, 2:19 PM

According to the manual and to the official SONY information presented in this forum, supersampling with have absolutely zero effect in this case. Vegas won't even actually do any supersampling at all and will ignore the setting completely.

Supersampling only adds frames when the motion is created by Vegas, for example, when using track motion to move the frame. It has absolutely no effect on any motion that already exists in the video clip.

Regular resampling will make the motion smoother at the cost of possible blending and ghosting. Unless you are encoding for a medium that restricts you to 24fps, i would leave it as 15fps. You won't be able to dramatically improve the quality by using a faster frame rate and you stand to introduce a lot of degredation.

farss wrote on 6/19/2004, 3:13 PM

I suspect what you've actually recorded is still 60i, the camera will be taking15 fps but converting that to 60i. This means for every frame the camera takes you have two duplicate frames and these are split into 2 fields, giving you 4 fields per frame to neatly convert to 60i.
It still LOOKS like 15fps but none of the DV systems support that, even 24p is recorded as 60i.
Except 24p or 24pA sets flags in the header so apps like Vegas know what it is and they understand how the pulldown has been applied in order to remove the 'pulldown' and convert to a true 24p. Even then you cannot PTT 24p, you can encode to mpeg-2 and author a 24p DVD and let the players apply pulldown so the TVs can handle it or with the right gear maybe play it out on a progressive scan system at 24p.
All that is a bit different to what you have! Apart from streaming media I know of no system that'll handle 15fps, probably Vegas will do a nice job of ditching every second frame and merging the fields to give you back a true 15fps avi, really depends on where you want to go from there.
As to converting to 24p, hmm, I think you're going to have problems. To be quite honest I don't understand why you shot at 15fps to start with. That's right on the borderline, I imagine you're going to get some big problems with motion artifacts at such a low frame rate. Usually the only reason those cameras have that shooting mode is for still image extraction, not for shooting video.
You see what you're trying to do involves creating a new set of frames by interpolation, Vegas can do this but the number don't look too nice for anything to handle that unlike 15 to 30, and then apply pulldown to get back to 60i. Vegas is probably the best tool to try doing all this with, but I wouldn't be expecting great results from anything, even shooting film at 15fps, ah well the lowest I've worked with is 16.6 fps and its pretty marginal outside of locked off shots.