Comments

jdozz wrote on 2/18/2002, 5:59 PM
I've been working on this issue for about 9 months. As soon as you figure it out, let me know. I've got the jitters!
FadeToBlack wrote on 2/18/2002, 6:03 PM
FuTz wrote on 2/18/2002, 6:05 PM
I never tried this but I noticed you can resample a clip in the manual (chapter 12, p.238).
You have to go into the "File" menu, choose "render as". In the dialog box then, click the "Custom" button to access the custom rendering settings. Select the "Resample the frame rate of all video" check box... THIS IS FOR RESAMPLING A WHOLE PROJECT.

You can also resample an EVENT: right-click the event and choose "properties" from the shortcut menu. In the "video event" tab of the "properties" dialog, select the "resample" check box...

If it works, TELL ME PLEASE!!! I'll probably have to use this shortly! ;D
PKowald wrote on 2/18/2002, 6:50 PM
On any clip where I have changed the timing of, I alway right mouse click on the event and check the resample checkbox, I also check the Apply interlace filter. I don't know why but applying the interlace filter seems to give better results. This solves about 95% Jitter problems. If that does not fix it, then I move the event framing slightly (ALT-with cursor to move the frames inside the event). This seem to fix the remaining.

Not I am a PAL man this may not work on NTSC.
Control_Z wrote on 2/18/2002, 6:51 PM
163 posts, but no definitive answer. Just constant repetition - resample, best quality, blah blah.

Last one I tried I got it down to 2 jerky clips out of about 30. Good, but not usable. Until SF fixes it I'm forced to do my slo-mo's in Premiere6.
FadeToBlack wrote on 2/18/2002, 7:01 PM
DataMeister wrote on 2/18/2002, 7:02 PM
For all you people with the jitters. The resample option is the proper way to get smooth video from a slow motion clip.

JBJones
jdozz wrote on 2/18/2002, 8:39 PM
Thanks again Control_Z, I've tried everything and can't get the jitters out.
jdozz wrote on 2/18/2002, 8:42 PM
GG, I respect your comments and I have spent many hours reading and implementing all the suggestions with limited success. It shouldn't be that hard to fix the jitters.
DataMeister wrote on 2/18/2002, 8:57 PM
What? Is the resample option not working to remove the jitters?

JBJones
FadeToBlack wrote on 2/18/2002, 9:06 PM
PeterWright wrote on 2/18/2002, 11:06 PM
A tip from another forum which may be worth a try:

Put a copy of the same clip "above itself" on the next track.
Offset this higher clip One frame to the left (i.e. "earlier")
Set opacity of the higher track to 50%
Pre-render using "Good" and "Resample" and interlace filter.
FuTz wrote on 2/18/2002, 11:13 PM
Yeah... concerning me too, for "immediate_&_future planning"...

The Act:Do you preview through:::::
- your FireWire card
- a second monitor (DualHead option...)
- the software itself?

The Source: Are you previewin' from:::::
- the Timeline
- the "media pool" tab ( VV3 lower left (by default))
- "VV3 explorer" view (tab down there, too...)
- some other way?
jdozz wrote on 2/18/2002, 11:17 PM
Yep, not working. I'm going to follow all of GG's suggestions from the start and see what happens.
HPV wrote on 2/19/2002, 1:24 AM
I've had clips flip the field order. Check the clip in properties and make sure it's lower field first (for DV). I've also used progressive for rendering with good results.
BTW, I read that using opposite field order on reverse speed works great.

Craig H.
Hapeman wrote on 2/19/2002, 9:43 PM
One more suggestion. Some jitter may be caused from frames not synchronizing.

Have you tried making your slo-motion speed divisible by the frame rate? e.g. NTSC, 50%=15 frames per second (every second frame), 33%=10 frames per second (every third frame), 20%=6 frames per second (every fifth frame). This way your rendered video is syncronized frame by frame with the slo-motion event.

Theoretically, when you aren't using a speed divisible by the frame rate, your rendered video is grabbing frames from the event at an inconsistent rate. e.g. 60%=18 frames per second (second, fifth, seventh, tenth, twelfth, fifteenth frames, etc.), resulting in inconsistent motion (jitter).

In addition to the other good suggestions here, you might try this. HTH.