What is your operating system?
Windows 10 64-bit
What is your Shotcut version (see Help > About Shotcut)? Is it 32-bit?
Can you repeat the problem? If so, what are the steps?
- Try to add a variable framerate video but with low/medium bitrate (in my case 11956kbps data rate / 12052 total bitrate)
- A prompt asks you to choose the quality. Choose any quality including the lowest, medium/good.)
In my case, after choosing the lowest conversion quality, the resulting file had 49799kbps data rate / 50309kbps total bitrate - almost 5 times higer.
The size of the converted file was 4 times larger.
Shotcut should not make the auto-conversion bitrate much higher than original, especially if the lowest conversion quality is selected from 3 levels.
Note - the VFR is between 29.57 and 30.47, average 29.99. Not much variability here.