zoom and pan of still images

I quite happy with the latest 0.5 release of kdenlive.

Zoom and Pan are a couple of video transitions that I learned to do with this version. Specifically, by selected use of the "PIP" one can create a zoom effect, or a pan affect on a still image.

PAN - in the case of PAN, I typically will start with a very wide image created by stitching various still images together in a panoramic presentation. For example, the resolution of the still panoramic image could be something like 3600x600 pixels. (after having been stitched together with something like "autostitch", or with one's camera's custom program). I then like to put the panoramic image on, say, track#1, and put a text clip (with a black "period" or other character, that does not show up against the black background) on track#2. I then add a PIP transition to cover both tracks. Then simply specify the dimensions of the START and the END in the PIP such that a panoramic effect is seen. This requires some iterative trial and error. If the image doesn't completely fill the frame, the black background from track#2 makes things look ok.

ZOOM - again, I paste the image I want to use for the zoom effect in, say, track#1. Again I like to put a text clip (with a black "period" or other character, that does not show up against the black background) on track#2. I then add a PIP transition to cover both tracks. Then simply play with the START and the END PIP parameters such that one achieves a Zoom affect. This requires some iterative trial and error in order to zoom in to the correct area.

That's nice! But I don't understand why you need that text clips. There's a drop down menu in the upper part of the transition tab where you can select "Background (black)" instead of "First video track", and that's it.

I have a question, however: are you satisfied with the quality of the results? My pans and zooms are quite jerky, it's not a smooth movement, but as if you would shiver while panning with a cam.

cjubon wrote:
There's a drop down menu in the upper part of the transition tab where you can select "Background (black)" instead of "First video track", and that's it.

Yes, you are right, ... that is easier to use than the "text clip" work around.

cjubon wrote:
My pans and zooms are quite jerky, it's not a smooth movement, but as if you would shiver while panning with a cam.

I found it depended on the speed in which I did the "artificial" pan. Sometimes it was jerky like you note. Other times it was not.

I also have that jerky result. Is there any way to obtain a smooth zoom????

Neither pan and zoom are smoothed.

And if the pixels are not square (aspect rate different than 1) the actual frame export give a 'disordered' output, due to diference of project size and export size (i.e. 720x756 in DV PAL and 768x576 in output).

Also, when aspect rate is different than 1, image clip or text clip, are scaled down some pixels but in nearest pixel mode, not bilinear. I suppose there is some aspect rate in there.