miamicanes
23rd September 2007, 21:41
I have a video captured from VHS that's interlaced. It was video from the start, so there's no pulldown to fall back on. I want to try and deinterlace it to 59.94fps... basically, using the scanlines from each field as a starting point and absolute reference for the new frame, then filling in the gaps using motion-compensated data collected from the previous and following fields & frames.
Why?
I just realized that the vertical jitter that DePanStabilize can't seem to fix appears to be caused by vertical shifts of a single scanline. It just occurred to me that DePanStabilize is probably "blind" to single-line shifts due to the way it seems to handle interlaced material (at least, it appears to be so, because those seem to be the vertical jumps that are falling through the cracks). So... the idea I had was to deinterlace it from 720x480@59.94i to 720x480@59.94p, THEN run DePanStabilize on it (fixing the single-line jumps where they occur), then throw away the scanlines that were synthesized during the deinterlacing step and turn it back into 29.97fps/59.94 fields/second interlaced.
Why?
I just realized that the vertical jitter that DePanStabilize can't seem to fix appears to be caused by vertical shifts of a single scanline. It just occurred to me that DePanStabilize is probably "blind" to single-line shifts due to the way it seems to handle interlaced material (at least, it appears to be so, because those seem to be the vertical jumps that are falling through the cracks). So... the idea I had was to deinterlace it from 720x480@59.94i to 720x480@59.94p, THEN run DePanStabilize on it (fixing the single-line jumps where they occur), then throw away the scanlines that were synthesized during the deinterlacing step and turn it back into 29.97fps/59.94 fields/second interlaced.