标签在HLS规范的draft-09中引入,没有任何示例.
3.4.13. EXT-X-MAP
The EXT-X-MAP tag specifies how to obtain the Transport Stream PAT/
PMT for the applicable media segment. It applies to every media
segment that appears after it in the Playlist until the next EXT-X-
DISCONTINUITY tag, or until the end of the playlist.
The EXT-X-MAP tag MUST NOT appear unless the Playlist also contains
the EXT-X-I-FRAMES-ONLY tag. It is RECOMMENDED that the EXT-X-MAP
tag only be used for segments whose resource does not start with a
PAT/PMT. …