Thank you for so useful post! It take few days to understanding this all.
So i have no any positive news about non-transcode methods - then i correctly installed Emby and tvheadend plugin. My odroid still use >150% when i swtich channel on my TV.
Don't understand where i can make mistake. May be iam choosing some wrong codecs i dunno.
Also i have problems with a tutorial:
i don't know where is correct ffmpeg so i don't know correct way to it