However, I get slightly different results every now and then, and I suspect this has to do with the 29.97fps drop-frame. That is, every now and then there is a frame missing or inserted. Anyone knows how to either tell Shotcut to ignore drop frames on 29.97fps video (just treat it as a sequence of frames, ignore timecode), or how to reliably get the offset?
I want the offset in seconds from the start of the source clip to the start of the filter.
Like, I place a clip (sample.avi) on the timeline starting at 0:00;0, then I split it at 0:10;0 (timeline at 10 seconds), giving me clip A and clip B. I want something that gives me zero seconds for clip A, and 10 seconds for clip B, so that I can figure out that two seconds into clip B is 12 seconds into sample.avi.