I haven't really had the time to convert many. Just one and It is just sitting there at 0% for a long while then it starts converting and the ETA is 22 hours for a 8GB movie. A couple notable things also: 1. the ui is kind of too small for a 4k screen and there is no way to adjust it. 2. this could very well be a user error, but I can't, for the life of me, find where to set the output file type. I want to convert an mkv to mp4 or something but I can't find that at all. 3. at the top of the right panel, there is this line that says "Extracting MP4Box.." that never goes away. 4. when I try to convert a movie (mine are all 4k HDR), a window pops up that tells me that DV tools not found, then offers me to download it, but nothing really happen when I click to download it. Could that be why that "Extracting MP4Box.." is sitting there at the top? This is on Cachy OS linux btw.