secure_token_content_type_mpd

The secure_token_content_type_mpd directive is used within the context of the HTTP, server, or location blocks in an NGINX configuration. This directive defines the Content-Type header that will be sent for DASH (Dynamic Adaptive Streaming over HTTP) media presentation descriptions (MPD) when secure tokens are being generated. By setting this directive, you ensure that clients and CDNs accurately recognize and handle the media type, which is crucial for proper streaming functionality.

This directive is part of the Secure Token module which allows for the secure distribution of media content. When a request for an MPD file is made, NGINX evaluates the specified Content-Type along with any associated access control settings determined by the secure token's parameters. This allows for a more controlled access mechanism for media files, ensuring that only authorized requests can retrieve the MPD files while adhering to the specified media type. The correct type for MPD files typically is application/dash+xml, and this directive allows for flexibility in specifying alternate types if needed.