[gstreamer-bugs] [Bug 538176] State change trouble with decodebin and empty files
GStreamer (bugzilla.gnome.org)
bugzilla-daemon at bugzilla.gnome.org
Fri Jun 13 11:29:12 PDT 2008
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GStreamer | gstreamer (core) | Ver: 0.10.18
Tim-Philipp Müller changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |t.i.m at zen.co.uk
Status|UNCONFIRMED |NEEDINFO
------- Comment #2 from Tim-Philipp Müller 2008-06-13 18:29 UTC -------
Just some quick comments (have only glanced at the code, not tried it):
- it's generally a bad idea to use gst_element_get_state (..., NONE)
in a real application, because it won't ever return if an error
occurs outside of the state change function (e.g. an error in
the streaming thread)
- downward state changes are immediate, you don't need to do a
_get_state() after a _set_state (pipeline, NULL). (And in
general, waiting for a state change with get_state usually
only really needs to be done if _set_change() returned
STATE_CHANGE_ASYNC, as it will usually only for state
changes to PAUSED/PLAYING).
- if you just want the tags, it's easiest to set the pipeline
to PAUSED state and then do something like:
msg = gst_bus_poll (pipeline_bus,
GST_MESSAGE_TAG |
GST_MESSAGE_ASYNC |
GST_MESSAGE_EOS |
GST_MESSAGE_ERROR);
in a loop until you get ASYNC, EOS or ERROR. This will iterate the
main context though; gst_bus_pop_filtered() does the same thing without
iterating the default main context.
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