[jowsie]

Does this also allow you to cast arbitrary media to the Chromecast? I couldn't tell from the readme.

[input_sh]

I've been using catt (https://github.com/skorokithakis/catt) for years for that purpose. Basically:

    pip3 install catt

And then:

    catt cast <any image/song/video/URL supported by youtube-dl>

[SyncOnGreen]

https://airflow.app/ is worth mentioning - paid software (sadly Windows/macOS only) but works with everything you throw at it, transcodes unsupported codecs seamlessly and has great UI with remote control via an app.

[emayljames]

bubbleupnp is the most customizable and reliable app I have found for streaming/casting.

[geitir]

Plex does