Can't import media into DaVinci Resolve

I tried drag and drop, i tried the import media option. I moved all the files I wanted to import into /home/"username"/video just in case, and it doesn't work either. It sees the folder, but it cant see the .mkv video files (these are my recordings from obs). I tried converting the file to mp4 (by just changing the .mkv to .mp4, it seems to work, i can open and watch it outside resolve) and it changed nothing. Drag and dropping other mp4 files sort of imports them, but playing the clip inside resolve gives no video and no audio. EDIT: I converted one of em to .mov with ffmpeg and was able to import the file into media bin, but its just black screen now. Can't put it onto a timeline.