As you're playing from MMW via DLNA you should be able to auto-convert on-the-fly from AVI to a supported format.

I think you're right.

I can cast mp4 and mkv, but not avi it appears.

I see no information confirming that video casting is supported in the first place from MMA. If it is it likely only supports limited file formats as Chromecast is limited in its capabilities.

MMA. I'm sharing via my computer (running MM4), and I tried to cast a movie from my Android on MMA.

Which App? MMA or MM8? MMA does support Chromecast.

Not even via the MM app? Well, that's a bummer.

DLNA and Chromecast are different technologies. MMW only supports DLNA not Chromecast (yet).

Hi there,

I'm trying to avoid my Blu-Ray player for various reasons when streaming videos from my computer, so I set up MM4 to run a DLNA that I can then cast to my Chromecast Ultra. I can play music just fine, but shared videos do not run, no matter what format.

Any settings I need to make sure I have?

I moved the Cache to my SSD, and the max cache size is set at 50000 MB.