Last time I had some problem, as after adding any file on the monitor I could see only white screen. The sound did work, but I had no screen on the monitor either on the time line. I realized that this is only with ffmpeg 0.7.8, but ffmpeg 0.10 has problems with generating any mp4 file, I wrote about this earlier:
Anyway, I did manage with this (option with ffmpeg 0.7.8) by switching on generating proxy files. With this everything is fine on the monitor or time-line, and I have made a good project.
Day after I would like to finish another old project, but after opening files with old project I have realized that again during playing on the monitor in the place of move files I had white screen (other files like titles, colors were fine).
I would like load files again to have version with proxy, but this time system did not generated proxy after adding a new movie file, so my question is: How to do this? How to generate proxy files in project, in which before I had no proxy.