mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-11-20 10:31:17 +00:00
22cc8c4986
Mention newly added hlscmafsink element and new properties Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1306>
36 lines
1.8 KiB
Markdown
36 lines
1.8 KiB
Markdown
# GStreamer HTTP Live Streaming Plugin
|
|
A GStreamer HLS sink plugin. Based on the
|
|
["hlssink2"](https://gstreamer.freedesktop.org/documentation/hls/hlssink2.html?gi-language=c)
|
|
element.
|
|
|
|
The `hlssink3` plugin consists of `hlssink3` and `hlscmafsink` elements.
|
|
`hlssink3` element generates traditional MPEG-TS based HLS segments
|
|
and playlist while `hlscmafsink` generates `CMAF` (fragmented mp4)
|
|
segments.
|
|
|
|
**NOTE**: `hlssink3` element is feature-equivalent to the `hlssink2` element.
|
|
Any pipeline that uses `hlssink2` can use the `hlssink3` element
|
|
and the result should be the same.
|
|
|
|
Both elements have a `playlist-type` property used to control the behavior of the HLS playlist file. The
|
|
available values for this property are:
|
|
- `null` (default): The tag `#EXT-X-PLAYLIST-TYPE` won't be present in the playlist during the pipeline processing. The
|
|
playlist will be updated in sync as new segments are available, old segments are removed, keeping N segments as
|
|
defined in the property `playlist-length`. This is the default behavior, and is compatible with how "hlssink2" works;
|
|
- `"event"`: The playlist is updated as new segments are available, and the tag `#EXT-X-PLAYLIST-TYPE:EVENT` is present
|
|
during processing. No segments will be removed from the playlist.
|
|
- `"vod"`: The playlist behaves like the `event` option (a live event), but at the end of the processing, the playlist
|
|
will be set to `#EXT-X-PLAYLIST-TYPE:VOD`.
|
|
|
|
At the end of the processing, `#EXT-X-ENDLIST` is added to the playlist
|
|
if a `enable-endlist` property is enabled (default is `true`).
|
|
|
|
## Live playlist generation
|
|
|
|
In case of live recording with multiple playlists,
|
|
the `#EXT-X-PROGRAM-DATE-TIME` tags can be useful hint for clients
|
|
when mapping each stream time to the wall-clock.
|
|
|
|
The `#EXT-X-PROGRAM-DATE-TIME` tags will be written to the playlist
|
|
if `enable-program-date-time` property is enabled.
|
|
|