During render testing to and fro, I have had a suspect that now and then the content of ffmpeg compression type has changed or could not be picked up again. But I have thought it was me that had confused or forgot something. Or may this occur by other reasons? Seemingly this happened recently during render switching between hevc_vaapi,mp4 and hevc_qsv.mp4 . hevc_qsv.mp4 has several more pixel options than hevc_vaapi.mp4 which has only the single "vaapi" option. And in one occasion I got more pixel options for hevc_vaapi.mp4(?) - or was it still on hevc_qsv,mp4? So to find out, I have tried to edit the hevc_vaapi.mp4 file, but have not got the edited content loaded in the video wrench compression window. So I wonder where is the preset file used by Cingg located? I have # ls -l /Cin lrwxrwxrwx 1 root root 29 Oct 22 20:23 /Cin -> /home/cinelerra/cinelerra-5.1 and the hevc_vaapi.mp4 preset file with the same content located in both /Cin/bin/ffmpeg/video /Cin/ffmpeg/video But the edited content isn't visible in Cingg?