Emby not playing MP4/H.264 files

Hello,
I have the server set up on a fresh install of Debian Jessie.
It's on an HP N40L.
The problem is that it does not play my video files ripped by Handbrake.
I'm trying to play them using a Western Digital Plus as the client.
I don't think it's the client, as these same files played with that client on another server.
Please let me know what further information you may need to help me. Or, what you'd suggest I look at.
I have not made any modification to ebmy, other than supply it its folder for movies. Some movies do play, but films ripped with Handbrake today, just to test do not work at all. Client says video file not supported, but that's it's normal standard error message.
I know emby transcode, how, for example, can I check that it's actually doing it transcoding. Or, where can I find the transcoding errors.
Thanks a lot.

Zitat von tinh_x7

You probably need to open this issue with Emby forum along with your logs.
I'm in the similar situation as yours.

Are you able to play the files locally?

It would be nice if those for whom it's working comment. Or, perhaps share their configuration files.

I can play locally, no problem.