Installing and using mkchromecast.
Execute the command as root.
apt install mkchromecast
Playing a local movie on a named Chromecast device from a certain position.
mkchromecast --control --name <device-name> --video --input-file <movie-file> --seek <time>
Playing a stream on a named device allowing control over sound.
mkchromecast --control --name <device-name> --source-url <url>
Play from a specified position in time.
mkchromecast \
--video \
--name LG\ Livingroom \
--control \
--seek 00:23:00 \
--input-file '/home/arjan/mnt/avmedia/DOWNLOADED/The.Flash.2014.S04E21.Harry.and.the.Harrisons.720p.WEBRip.2CH.x265.HEVC-PSA.mkv'
Playing live stream from BNR radio.
mkchromecast \
--control \
--name LG\ Livingroom \
--source-url http://icecast-bnr.cdp.triple-it.nl/bnr_mp3_96_06