Micro-freeze playing (live) HLS streams

[Charles Turner]

Hi Juan,

On Tue, 2019-07-23 at 15:22 -0300, Juan Ramírez wrote:
> I am getting "micro-freezes" (meaning video stops for a fraction of a
> seconds and the resumes) at regular intervals, and those intervals
> coincide with the length of the playlist (given that the usual .m3u8
> file contains 3 .ts segments totaling between 10 and 15 seconds of
> video). It doesn't happen with all the HLS streams I've tested, but
> it happens with a lot o them.

This is definitely a QoS bug, which isn't that unusual for elements in gst-plugins-bad. Please file this as a GitLab issue[1]. I had
a quick peek at what might be going wrong and one hunch is that
adaptivedemux isn't giving itself enough time, or is somehow stalling in updates_loop during the playlist updating logic. Maybe the
target_duration wait times and/or the update timer cond bits need some
adjustments.

It will require some digging in the bug report regardless.

Thanks for the report,
  Charlie.

[1] https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/issues