[Bug 696631] New: hlsdemux: unnecessary switching to lowest bitrate

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=696631
  GStreamer | gst-plugins-bad | 0.10.36

           Summary: hlsdemux: unnecessary switching to lowest bitrate
    Classification: Platform
           Product: GStreamer
           Version: 0.10.36
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: fraxinas at opendreambox.org
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


i investigated the phenomenon that hls-demux playback tends to switch to the
lowest available bitrate which seemed to happen especially on super fast
connections.
i observed that this happens in the log before the bitrate switches to the
lowest available stream:

0:00:10.514954329  2180   0x87f570 INFO                hlsdemux
gsthlsdemux.c:1268:gst_hls_demux_get_next_fragment:<hlsdemux0> Fetching next
fragment http://***:8080/***/***-1_541759.ts

** (gst-launch-0.10:2180): CRITICAL **: gst_fragment_get_total_size: assertion
`GST_IS_FRAGMENT (fragment)' failed
0:00:11.626698109  2180   0x87f570 DEBUG               hlsdemux
gsthlsdemux.c:1244:gst_hls_demux_switch_playlist: Downloaded 0 bytes in
0:00:01.202326000. Bitrate is : 0
0:00:11.627190331  2180   0x87f570 INFO                hlsdemux
gsthlsdemux.c:1145:gst_hls_demux_change_playlist:<hlsdemux0> Client was on
2085600bps, max allowed is 0bps, switching to bitrate 985600bps

then, it downloads the same fragment index again with the lowest bitrate
it turns out that hlsdemux actually starts the download of the fragment too
early, before it is actually present on the server, hence the 0 byte size.

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