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Knowledge base Article
Do not transcode your PLEX media files
Do not transcode media files by default. Our servers aren't designed to transcode media files. Doing so will result in a lot of stuttering en buffering, as the CPU is trying to catch up to the stream (which it won't). Use 'Direct Play' instead, be sure your devices have to proper codecs installed to be able to play the content you want to watch.
To explain: when your transcode 1080p content, then all the transcode does is lower the bitrate of the content to 720p. It is way more efficient to just download a 720p release in the first place to avoid any issues during playback. We have made a video tutorial for you to follow, to make sure transcoding is disabled: