1) Avidemux simply refuses to save many edited mp4 files on the points asked to it. The desirable time start and end points. (Pops up 'saved' and saves nothing. I understand its the key frame thing).
2) VirtualDub for 95% of cases cannot cut out a part exactly where asked for in the start (goes back many seconds earlier spoiling the saved piece).
Can you suggest some good and better performing / more powerful software (can be paid)?
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