[chimerax-users] Suggestions for optimizing movie quality when working with file size limits?

Dear ChimeraX team, Making movies in ChimeraX is my favorite way of communicating my research, but unfortunately many journals have strict file size limits for supplementary movie files (30 MB in my case). I am wondering if there are suggestions for settings that give relatively small files with good visual appearance, i.e a specific format that works better then others. I am currently encoding in .mp4. Is it preferable to set qscale rather than quality/bitrate? I assume both bitrate and the windowsize scale linear with data size? Or are there recommendations for external software that efficiently compresses high-quality ChimeraX movies? Many thanks, Matthias