2025-09-30, 01:10 AM
Follow up: the issue is not just the Roku, but the platform the server is hosted on. I tried the Roku Streaming Stick 4K model 3820R2 and noticed the same buffering issue feeding a 1920x1080 monitor streaming from an RPi4 host server. The default resolution setting on the 3820R2 is "Auto 1920" but changing it to 720p seems to alleviate the buffering issue - at the expense of picture sharpness. I set up Jellyfin on a Windows PC and there are no transcoding/buffering problems in either resolution, so this confirms the RPi4 is not an ideal server host for files needing transcoding (i.e. .mpk files)