Hey, all -- I have just a few videos that won't consistently Chromecast. Messing with rate settings and such hasn't helped. I'm running ArchLinux with Emby Server 4.3.1.0 -- I've tried a bunch of different client devices, including an Android phone, Arch laptop, and Windows. The client doesn't seem to matter.
What's fun is that it's specifically Chromecast with these files. They'll play back fine in the Android app and web player, and most of my files Chromecast just fine.
I've attached the Emby log statements from one attempt, and here's the file metadata.
testcase.log
metadata.txt