After installing new RPi LibreELEC release 8.2.0.1 and newest tvheadend from here:
Tvheadend nightly builds for LibreELEC
is two problems:
1. Storage space show: 0/0/0 and unable to record
2. When I choose: Configuration > codec profiles, I can't add h264_omx. Field "codec" is empty. Also profile "webtv-h264" is grey.
Ad.1 Need to be change path for recordings. Some reason new LE doesn't have "/storage/Recordings". I've changed to "/storage/video" and now I'm able to recording. But still GPU transcoding doesn't work on RPi with omx transcoding profile with resize, deinterlace etc.