By way of a change from my audio issues...

Spent an hour this morning trying to fathom why I couldn't make a still image at the end of an MP4 movie clip.

Solution: It seems you can't make one from a video for which you've increased Speed. I'd doubled mine. Tried various others with same result (an all black image). OK for the slower speeds I tried. Haven't tested for other clips but assume they would have same problem. Nor have I tried changing project frame rate settings.

The obvious work around is to capture your image before you apply speedup.

Terry, East Grinstead, UK