[Bug 777229] New: hlssink: to include BANDWIDTH tag

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=777229

            Bug ID: 777229
           Summary: hlssink: to include BANDWIDTH tag
    Classification: Platform
           Product: GStreamer
           Version: 1.10.2
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: asilby at yahoo.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Would it be possible to change the hlssink to allow adaptive bitrate streaming?

This would mean that the #EXT-X-STREAM-INF:BANDWIDTH=1280000 type tag is
written to the playlist file. Multiple bandwidth tags would be written to the
playlist file to allow the client to choose which bandwidth is best for the
current connection.

See here for more info:
https://tools.ietf.org/html/draft-pantos-http-live-streaming-20#section-4.3.4.2

It says:

4.3.4.2.  EXT-X-STREAM-INF

   The EXT-X-STREAM-INF tag specifies a Variant Stream, which is a set
   of Renditions which can be combined to play the presentation.  The
   attributes of the tag provide information about the Variant Stream.

   The URI line that follows the EXT-X-STREAM-INF tag specifies a Media
   Playlist that carries a Rendition of the Variant Stream.  The URI
   line is REQUIRED.  Clients that do not support multiple video
   renditions SHOULD play this Rendition

   Its format is:

   #EXT-X-STREAM-INF:<attribute-list>
   <URI>

   The following attributes are defined:

      BANDWIDTH

      The value is a decimal-integer of bits per second.  It represents
      the peak segment bit rate of the Variant Stream.

      If all the Media Segments in a Variant Stream have already been
      created, the BANDWIDTH value MUST be the largest sum of peak
      segment bit rates that is produced by any playable combination of

      Renditions.  (For a Variant Stream with a single Media Playlist,
      this is just the peak segment bit rate of that Media Playlist.)
      An inaccurate value can cause playback stalls or prevent clients
      from playing the variant.

      If the Master Playlist is to be made available before all Media
      Segments in the presentation have been encoded, the BANDWIDTH
      value SHOULD be the BANDWIDTH value of a representative period of
      similar content, encoded using the same settings.

      Every EXT-X-STREAM-INF tag MUST include the BANDWIDTH attribute.

      AVERAGE-BANDWIDTH

      The value is a decimal-integer of bits per second.  It represents
      the average segment bit rate of the Variant Stream.

      If all the Media Segments in a Variant Stream have already been
      created, the AVERAGE-BANDWIDTH value MUST be the largest sum of
      average segment bit rates that is produced by any playable
      combination of Renditions.  (For a Variant Stream with a single
      Media Playlist, this is just the average segment bit rate of that
      Media Playlist.)  An inaccurate value can cause playback stalls or
      prevent clients from playing the variant.

      If the Master Playlist is to be made available before all Media
      Segments in the presentation have been encoded, the AVERAGE-
      BANDWIDTH value SHOULD be the AVERAGE-BANDWIDTH value of a
      representative period of similar content, encoded using the same
      settings.

      The AVERAGE-BANDWIDTH attribute is OPTIONAL.

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