Check if the stream st contained in s is matched by the stream specifier spec.
See the "stream specifiers" chapter in the documentation for the syntax of spec.
@return >0 if st is matched by spec; 0 if st is not matched by spec; AVERROR code if spec is invalid
@note A stream specifier can match several streams in the format.
See Implementation
Check if the stream st contained in s is matched by the stream specifier spec.
See the "stream specifiers" chapter in the documentation for the syntax of spec.
@return >0 if st is matched by spec; 0 if st is not matched by spec; AVERROR code if spec is invalid
@note A stream specifier can match several streams in the format.