> > Does it mean it's the original video to blame? > Very possible.
> Can it be a framerate related issue? > Possible. Another thing I noticed just now splicing out a sample for you: using avidemux (because I can't figure out how to go frame-by-frame in cinelerra) you can start at the beginning and advance one frame at a time and *never* find a black frame. But if you then turn around and go back over the frames you just went over you'll find a black frame every 3rd or so frame. My very-undereducated guess would be the black frame is a non-key/i-frame, and avidemux is lazy and doesn't scan back through the frames to find the last key/i-frame and then roll forward to calculate how this frame would display. It just says "oh, not an i-frame, just show black". But then why cinelerra would show these blacks as it moves forward, that one I can't guess. > > If you want you can send me privately a few seconds of the problematic > material (using a service for attachments). I can have a look at them in > the weekend. 5M download: https://s3.amazonaws.com/fbautoresponder/video/sample.avi Thanks!
