So I am in the process of ripping my massive blu-ray collection into MKV files, these are uncompressed resulting in 30GB-50GB a movie. I have a 4tb hard drive to handle the memory needs that is not the concern, but my Plex media transcoder uses a lot of cpu resources when I want to watch one of these on my ATV or Roku (I assume because the file is huge). Which brings me to my question, I would like to keep my uncompressed mkvs in a folder and create compressed versions of these movies for use on my roku/atv, perhaps in a container that does not require transcoding. I believe roku/atv both natively support mp4? Is there a preset in handbrake that can significantly compress file size, yet keep the quality very very close to original blu-ray? Please, share your recommendations! I know that there will be some quality loss, but if it means each file won't need to be transcoded to be watched, I am willing to sacrifice. Thanks!