Ghost frames on fast motion

philRmonic wrote on 12/18/2011, 5:08 PM
Most of my video is slow moving stuff but I have a clip of geese flying overhead and I'm having trouble rendering the clip to my satisfaction. It was shot on a Panasonic SD700 at a frame rate of 25fps / Interlaced scan. What I'm seeing, per rendered frame, is the main image of the birds' wings in one position and a ghost image overlaid in the next position which I assume is due to the interlacing. I've tried loads of different renders but all seem to exhibit this effect to a greater or lesser degree. I realise I won't be able to eliminate it (I should have shot it at 50p!) but I'd appreciate any suggestions to reduce it as much as possible. Thanks!

Comments

Eugenia wrote on 12/18/2011, 8:13 PM
You make sure both your project properties, and your export properties match your source footage. Then, you always "disable resample" on ALL the clips in the timeline just before you export.
philRmonic wrote on 12/19/2011, 3:41 AM
Thanks for the tip. I use "Match Media Settings" to make sure I get the right properties and I'm sticking to renders that "Match Project Settings" at the moment. The disable resample has improved things quite a bit, thanks! However I've slo-mo'd (x0.25) a small section and it makes it look worse, quite a lot of "jitter" - is there anything I can do about that? I may just leave it out if it's unusable.

(Incidentally, how do you set "disable resample" on more than one clip at a time? If I select more than one, "properties" is greyed out)
Eugenia wrote on 12/19/2011, 6:02 AM
To disable on all clips in the timeline you use either the SHIFT key to click from one side to the other, or you use the EDIT mode on Vegas that it's drag-selection.

For a ghost-free smoother slow motion you need something like Twixtor, which costs $300.
philRmonic wrote on 12/19/2011, 7:22 AM
Mmm, yes expensive! And the website implies it only works with Vegas pro? Think I'll have to be creative!

Got the Disable Resample sorted - I should have been going to Edit->Switches. Thanks!