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https://bugzilla.gnome.org/show_bug.cgi?id=656317

When it receives a seek in push mode, the qtdemux should first try to push the event upstream, and only if upstream fails fall back to
its own seek logic.

When receiving a duration query for TIME format, try to query upstream, and only if upstream fails fall back to qtdemux duration handling.

Use the caps properties for alignment and format.
Remove some old properties, we always want to use bufferlists when we can now.

This reverts commit 1b09bc60.

Seems to make libv4l2 complain, maybe because we call REQBUFS with 0 buffers
before we allocated buffers.

See https://bugzilla.gnome.org/show_bug.cgi?id=670257

In OSX is allowed to configure the default audio output device,
prefered channel layout and speaker positions through the tool
"Audio MIDI Setup".

Get URI location using gst_uri_get_location(), so any
escaped bits get unescaped.

https://bugzilla.gnome.org/show_bug.cgi?id=609049

https://bugzilla.gnome.org/show_bug.cgi?id=609049

Conflicts:

	gst/multifile/gstsplitfilesrc.c

The memory was added to the input buffer instead of the output buffer.

Don't reset the time in flush-stop. Live sources can do this flush in the
playing state and so the pipeline will never have a chance to update the
base_time of the elements, which only happens when going from paused to
playing.

A big refactoring to allow passthrough AC3/DTS over SPDIF.
Several random cleanups and minor fixes.

https://bugzilla.gnome.org/show_bug.cgi?id=657941

Always send the flushing events to the udp elements now that basesrc supports
this. This makes sure a segment event is sent correctly after a flush.
Keep track of the currently executing command and make it possible to specify
what command you want to cancel when starting a new async command.

See https://bugzilla.gnome.org/show_bug.cgi?id=677905

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=677838

UVC devices are never interlaced, and doing VIDIOC_TRY_FMT on them
causes expensive and slow USB IO, so don't probe them for interlaced.

This shaves 2 seconds of the startup time of cheese with a Logitech
Webcam Pro 9000.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=677722

These should all be int instead of long, to avoid bugs
when passing these as varargs with g_object_set(), and
there was no reason to use long in the first place here.
Fixes FIXME.

From 03a0e57 to 98e386f