Slow-mo problem

[Gynoom]

Hi, I'm working on a project and I'm using a lot of slowmotion in it. But when I export it to DV the slowmo will become jerky, and it will shake. I've renderd it in lowerfields first, is that my problem ? Should I render with no fields ? Won't it infect the rest of my video ?

Thanks

 

[Akribie]

You may need to deinterlace. There's an option in the Clip/Video/Field Options to deinterlace when speed is below 100%.

You will also get cleaner results if you stay with 1/2, 1/3, 1/4, 1/5 etc speed so that Premiere doesn't have to blend frames.

You might want to read

http://www.adobe.com/support/techdocs/102b2.htm

and

http://www.adobe.com/support/techdocs/104b2.htm

If you already have After Effects, use that for slow motion - gives much better results and offers variable speed.

Otherwise, you might want to look at the trial version of the Panopticum Tools plug-in for Premiere, which includes variable slowmo. It's around $40.

 

[Gynoom]

Hi, thanks for your reply, but I already tried that.
and I work with PAL so it is 25 frames p/s so the most times he will blend the two frames together.
But I also have the same problem if I fade 1 track into another one.
Do you know what else I can do ??
Because I really thought it was about the render settings, setting it to No fields, but there must be a way to set it to lowerfields first and still have a normal slowmotion.

 

[Akribie]

I work in PAL, too. Doesn't change anything, though. Same principles for NTSC, but different numbers.

The whole point about using integer divisors for speed is that Premiere can then just duplicate frames rather than interpolate and this gives much better quality.

Unless you start with high-frame-rate originals (ie not standard DV at 25fps), you'll always see some jerkiness with slowmo, especially during fast movement and with slower replay.

Lower field first is the standard for DV, so that shouldn't be the problem. 'No fields' is unlikely to help very much for video replay - it's relevant mostly to computer replay where the display is non-interlaced.

Is your source material from video or somewhere else?

 

[Gynoom]

It's all DVCam, but I trowed some blur over it and some flicker removal and it looks fine now. It's what you said, the movement is just to fast,to get a good slowmotion.
But thanks for your help.