/usr/share/rygel/presets/GstMP4Mux.prs is in rygel 0.32.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | [_presets_]
version=1.0
element-name=GstMP4Mux
[Rygel DLNA preset]
streamable=true
faststart=true
|