headers

Request headers, for the http and https protocols. Passed to a configured or automatic MediaIoResolver when it supplies the transport. An external subtitle gets them only when it has the same scheme, host and port as uri; see SubtitleSource.

Respelled by the FFmpeg backend as the http protocol's own headers option, one CRLF-joined block, through the same pre-open funnel openOptions uses. A headers key in openOptions as well refuses the open. On media no http protocol opens (a local file), the unused-option warning reports them, typed.