Embedded video stream is to dark - e.g. wrong gamma

Hi, we have added a code snippet to include custom live stream.

Stream is captured and preprocessed by OBS (https://obsproject.com/). We are using MistServer (www.mistserver.org) as kind of middleware. MistServer provides different output formats. Luckily autostart works fine. The only problem is, that video is realy dark.

We haved tested it in vlc player or by calling streaming site directly in IE, Firefox, etc. All colors are correct. On XIBO Android device output is very dark. Or it is more a gamma correction issue?

Had anyone made the same experiences?

What is the best way, to capture external soruces like sat, cable etc. and to put it in a template file?

Best regards, Maik