Handle setting specific values in `GstEncodingProfile.format` caps in the rendering profile
@thiblahute
Submitted by Thibault Saunier Assigned to Thibault Saunier @thiblahute
Description
WIth x264enc specifying the profile is done through caps, which means that we should add profile=some-profile
in the GstVideoEncodingProfile::caps
to let user set it, and thus to avoid negotiation of the profile. This is also true for the level
field.
Currently we are only able to set element properties and not caps values.
We will need to special case those field in a list of well known caps field for specific formats.