I'm a recent user and I really enjoy the software, my footage is almost done after hours of work but I'm a bit scared with an important issue.
My video contain multiple video tracks with multiple simultaneous effects (transparency, scale, in-out fades, Pan and zoom, brightness-contrast adjustments). Some effects also use keyframes.
In the preview window, the result is exactly as expected.
Now I'm trying to export my video in 4k resolution.
I've tried MKV and MP4