How to prevent 'jitters' using Pan and Zoom

[asik1]

Yes the jitter happens on playback in editing phase also. What I mean by jittering is is when the panning goes from left to right it is NOT smooth fluid motion. The motion appears to jump 2, 3, 4 or more pixels at a time instead of 1 pixel per frame almost as if one was viewing motion at say 10 frames per second.

The plain mathematics is different,
The pan in that vsp is ~2250 pix, so if you're looking for 1pix/frame than the pan should be 2250/25 = 90sec.
The current 375frames vsp, get you 2250/375=6pix/frame.
I just rendered it to 90sec and it's much smoother. You should "snap to grid" so you wont get vertical jitter.

** I don't think X7 is any better in that aspect , but if you have it you should use it.

[jparnold]

Thanks for that information and I understand what you say.
What I can't understand though if I create video with my video camera and pan (at a similar speed) horizontally the resulting video is MUCH smoother than applying pan to an image via the pan and zoom funtion.
I guess some of that is because I record at 50p HOWEVER I render that to MPEG4 at 25fps and it's still smooth. Why can't I get smooth panning using pan and zoom? That is what I would expect.

[lata]

Hi John
Just tried your VSP, with Asik’s thoughts regarding Snap to Grid it does appear to be smoother if the start and end verticals are the same level
In my tests I used the 9 anchor points to position the pan, clearly I was panning horizontally. When I panned across and up a little I notice a stutter.

Frames types, progressive or Interlaced
You mention recording to 50P (progressive) yet have your project set to 25fps Interlaced.
If you are using 50P for the video and the burning a Disc it would use 25fps, removing 50% of the frames, you can as far as I remember use 25P to burn the disc.
This would retain better quality and more suitable for Slide Shows / still images
You then say you are rendering to Mpeg4, that would be progressive I would have thought, You may be best in setting the project properties to those Mpeg4 settings.

Rendering video clips --- as each frame is different this may hide any small stutter (more forgiving) the image has multiple frames all identical, easy to notice any changes.

So are you burning DVD Discs?
You are using 50P progressive video
Images would be better using Progressive

Oh
Have you managed to get X7 running.

[jparnold]

Trevor,
You come to my rescue again.
Problem is that although I have seen 'snap to grid' before I cannot locate it.
No I don't burn DVD disks anymore as I can plug in usb memory sticks to my flat screen tv and DVD player.
Yes now have VS7 Untimate installed and running after applying the hotfix, thanks.

[lata]

Hi John
Can you tell us the properties of your video file, you mention recording to 50P, but what are the full properties
You may be best to set those as your project properties, at the moment you are using DVD 720 x 576 Pal

[jparnold]

Thanks Trevor,
Sorry the project properties may have been that for the project file but I usually don't have them set that way - not sure how they got to DVD 720 x 576 Pal.
I may have misled you regarding 50p.
My camera is set up to record at 1080p (I can also set it to 1080i) and so when I copy my recorded video clips from the SD card to PC (as .MTS files) they are 1920X1080 at 50 frames per second.

[lata]

Snap to Grid will make it easier to set positions in line
There are also the "anchor" points that I find useful

click image for larger view

[jparnold]

Thanks Trevor
My eyes must be worse than I though (not noticing GRID before).
I have a small problem using snap to grid and that is I can't set the grid pattern small enough to ensure the vertical edge is where I need it so I didn't select snap to grid and set the start and end positions manually as best I could using the horizontal lines to try and ensure that there is no vertical movement during panning.

[lata]

Hi John
Did you try using Customise Motion instead of Pan & Zoom
Right click your image for menu options
Nice tool to use, I prefer it to P&Z

[jparnold]

Thanks Trevoe
I had looked at customise motion before but could not work out how to add a pan motion for just a small section of the original still (I want to pan across the faces of the group of people in the photo).