I have been attempting to stabilize some film transfer footage and kept running into a strange bug. The footage is 16mm film scanned to hd, so it it somewhat pilarboxed with black to left and right of the image. The program starts in black and fades in. When I just stabilize, ever so gently (full frame, strength 6), the previews always show the expected results, but when i go to render, the output frame is cropped top and bottom about 15% each. I have just now found that by doing two things, it seems to work.
- crop the original video so that it has no black left and right of the image. The width comes down to about 1440 pixels that way.
- trim the clip to pass the fade-in from black (I can fix that later).
Having done that, it seems to be giving me exactly the same output results as I see in the previews.
I will try next time to see if it was the cropping or fade in that was tricking the program, but for now I can finally move on to the next pass.