I have the Vizio P50-C1 and I have Casting working using "Yatse", which is a free Kodi Remote Android App, from the Play store.
Just use the Casting feature on Yatse.
The only problem is that GoogleCast devices (Chromecast and Vizio SmartCast) do not pass-through DTS audio.
The video will play , but no audio.
Video files with AC3 (DD+) and AAC work fine. FLAC does not work at all
Bluray files (mt2s) do not work either.
http://www.displayspecifications.com/en/model/308342b
This is a real bummer, since I have ripped all my movies to use 1509 kbps 6-channel DTS.
ES File Explorer and the default Android casting feature did not work for me either.
If your AVR supports ARC, then DTS is supposed to work.