'double_click_to_convert' stops at specific percent of conversion progress and makes a mp4.tmp file

Hello, I record sessions using Zoom. After recording, I try to create an mp4 file by clicking 'double_click_to_convert', but it keeps stopping at 35%, leaving only an mp4.tmp file. I think the file might be corrupted, but I have no idea why, as it usually works fine. Is there any solution to this?