QuEnc's speed problem is very strange: a friend of mine with same CPU as yours, reports to encode at 32/35 fps with same CPU usage.... Try using ffdshow with default options instead of DivX/XviD as DirectShow codec, if you will.
The option to automatically switch (or ask the user) to source video format (PAL/NTSC) is another good "ToDo" point.
What do you think about the GUI? Is it user-friendly enough? Any suggestions how to improve it?
Tnx again
Bye
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cloudy trichomes