HTTP Live stream error

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HTTP Live stream error

tonyt
Hi all  
   I'm trying to play http live stream with the latest gstreamer version (build from git://anongit.freedesktop.org/). I have a graph which is described by this call to gst-launch:

gst-launch --gst-debug-level=2 playbin2 uri=http://meta.video.qiyi.com/200/47241fa653d999359543e2ba2d3af343.m3u8

Video stop play shortly after initiating playback and I see these warnings from GStreamer:

0:01:28.410325448 17252 0xb2fb04c0 WARN           baseaudiosink gstbaseaudiosink.c:1365:gst_base_audio_sink_get_alignment:<audiosink-actual-sink-pulse> Unexpected discontinuity in audio timestamps of -0:00:30.000022675, resyncing
0:01:28.430482341 17252 0xb6cd5fb0 WARN                   pulse pulsesink.c:630:gst_pulsering_stream_underflow_cb:<audiosink-actual-sink-pulse> Got underflow


I found the PTS from server is not increase progressively always, sometime the PTS changed into zero. Is it case this or can anyone offer any other insight as to what might be causing this behavior?

BTW: Not only this url,most of url I played with gstreamer have the same problem.

Best Regards
      Tony