[Bug 751361] New: qtmux generates bad output timestamps

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=751361

            Bug ID: 751361
           Summary: qtmux generates bad output timestamps
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: blocker
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: thaytan at noraisin.net
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 305895
  --> https://bugzilla.gnome.org/attachment.cgi?id=305895&action=edit
qtmux timestamp input log

One of the recent changes to qtmux timestamp handling / CTTS offset bits break
splitmuxsink. For the second and further files, the timestamps produced by
qtdemux now look like this:

/GstPipeline:pipeline0/GstFakeSink:fakesink0: last-message = chain   *******
(fakesink0:sink) (133017 bytes, dts: 0:00:00.000000000, pts: 0:00:00.041666666,
duration: 0:00:02.419166666, offset: -1, offset_end: -1, flags: 00000040
discont ) 0x7f6798003630
New clock: GstSystemClock
/GstPipeline:pipeline0/GstFakeSink:fakesink0: last-message = chain   *******
(fakesink0:sink) (19969 bytes, dts: 0:00:02.419166666, pts: 0:00:02.502500000,
duration: 0:00:00.041666667, offset: -1, offset_end: -1, flags: 00002000
delta-unit ) 0x7f67980031f0
/GstPipeline:pipeline0/GstFakeSink:fakesink0: last-message = chain   *******
(fakesink0:sink) (7283 bytes, dts: 0:00:02.460833333, pts: 0:00:02.460833333,
duration: 0:00:00.041666667, offset: -1, offset_end: -1, flags: 00002000
delta-unit ) 0x7f6798003630
/GstPipeline:pipeline0/GstFakeSink:fakesink0: last-message = chain   *******
(fakesink0:sink) (12678 bytes, dts: 0:00:02.502500000, pts: 0:00:02.627500000,
duration: 0:00:00.041666666, offset: -1, offset_end: -1, flags: 00002000
delta-unit ) 0x7f67980031f0
/GstPipeline:pipeline0/GstFakeSink:fakesink0: last-message = chain   *******
(fakesink0:sink) (17459 bytes, dts: 0:00:02.544166666, pts: 0:00:02.544166666,
duration: 0:00:00.041666667, offset: -1, offset_end: -1, flags: 00002000
delta-unit ) 0x7f67980030e0
/GstPipeline:pipeline0/GstFakeSink:fakesink0: last-message = chain   *******
(fakesink0:sink) (5308 bytes, dts: 0:00:02.585833333, pts: 0:00:02.585833333,
duration: 0:00:00.041666667, offset: -1, offset_end: -1, flags: 00002000
delta-unit ) 0x7f67980031f0

See the attachment for the input timestamp info qtmux was given, but basically
the timeline starts at 0:00:02.419166666 and goes from there.

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