Pipeline Pause/Resume Fails

[David Manpearl]

*Issue*: I am unable to pause and resume a pipeline.
Pause works, but I have been unable to resume playing.

*Pause*: gst_element_set_state(pipeline, GST_STATE_READY)
Works!

*Resume*: gst_element_set_state(pipeline, GST_STATE_PLAY)
Fails :(
GStreamer error: element gbxdemux, msg: Internal data stream error.
{"dbg_info":"qtdemux.c(5850): gst_qtdemux_loop ():
/GstPipeline:pipeline2/GstQTDemux:gbxdemux:\nstreaming stopped, reason
not-linked (-1)","err":"Internal data stream error."}

*Pipeline*:
gst-launch-1.0 filesrc location=GOPR1568.mp4 ! decodebin name=gbxdemux !
videoconvert ! videorate ! videoscale !
video/x-raw,format=I420,framerate=30/1,width=1280,height=720 !
progressreport update-freq=2 ! x264enc ! mp4mux name=mux ! filesink
async=false location=/test_media/video.mp4  gbxdemux. ! queue ! decodebin !
audioconvert ! audioresample ! avenc_aac ! mux.

*Error*:
GStreamer error: element qtdemux1, msg: Internal data stream error.
{"dbg_info":"qtdemux.c(5850): gst_qtdemux_loop ():
/GstPipeline:pipeline0/GstDecodeBin:gbxdemux/GstQTDemux:qtdemux1:\nstreaming
stopped, reason not-linked (-1)","err":"Internal data stream error."}

*GStreamer Version*: 1.10.4

*Notes*:

   1. *async*: I recently added "async=false" to the "filesink". It has not
   resolved the issue, and I am worried that it may allow de-synchronization
   of audio and video on the output.
   2. *audio*: The same pipeline can be run with without audio by removing
   the ending phrase: "gbxdemux. ! queue ! decodebin ! audioconvert !
   audioresample ! avenc_aac ! mux." Same error.
   3. *state*: I have tried transitioning through GST_STATE_READY between
   PAUSE an PLAY. Same error.


Thanks!
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