Is it possible to push multimedia content on DLNA TV from Linux?
Yes it's possible, check out servioo and this superuser question.
Kinsky by Linn can do this across all platforms. It is in effect a uPnP control point.
For Android there is BubbleUPnP. This is capable of serving all DLNA/UPnP purposes outlined below, and is an excellent tool for carrying out tests.
On linux there is the gupnp-av-cp app that is part of gupnp-tools. I have read that it's also possible to to use pulseaudio (with rygel?) to push all system sound to a UPnP/DLNA device and am in the process investigating/implementing this. Will update when I know more.
On OSX 10.8, iTunes is capable of sending to both AirPlay and UPnP/DLNA devices.
To put this in perspective, DLNA, also referred to as uPnP, has three important devices:
- Media servers
- Media renderer
- Media control point