[Bug 771138] New: mxf: buffer pts aren't used

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=771138

            Bug ID: 771138
           Summary: mxf: buffer pts aren't used
    Classification: Platform
           Product: GStreamer
           Version: 1.8.3
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: cJ-gnome at zougloub.eu
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Noticed when generating images with imperfect PTS, that when they get into the
mxf stream with perfect PTS derived from the frame rate.
Expected result: original PTS are stored in the MXF stream.

Illustration: following generates a stream of ~ 3 fps declared as 30 fps, in
mp4 and mxf.
The mysrc element is a quick & dirty element that takes stuff from stdin and
sends it with arbitrary caps (based off videotestsrc).

 while true; do dd if=/dev/zero bs=3145728 count=1; sleep 0.3; done |
gst-launch-1.0 --verbose --no-fault mysrc !
video/x-raw,format=I420,width=2048,height=1024,framerate=30/1 ! identity
silent=0 ! vaapih264enc ! h264parse ! mp4mux fragment-duration=1000
trak-timescale=100000 ! filesink location=pouet.mp4

 while true; do dd if=/dev/zero bs=3145728 count=1; sleep 0.3; done |
gst-launch-1.0 --verbose --no-fault mysrc !
video/x-raw,format=I420,width=2048,height=1024,framerate=30/1 ! identity
silent=0 ! vaapih264enc ! h264parse ! mxfmux ! filesink location=pouet.mxf

The stream is then checked:

 gst-launch-1.0 --verbose --no-fault filesrc location=pouet.mp4 ! qtdemux !
identity silent=0 ! fakesink

 gst-launch-1.0 --verbose --no-fault filesrc location=pouet.mxf ! mxfdemux !
identity silent=0 ! fakesink

mp4 says:

 /GstPipeline:pipeline0/GstIdentity:identity0: last-message = chain   *******
(identity0:sink) (240 bytes, dts: 0:00:00.018040000, pts: 0:00:00.018040000,
duration: 0:00:00.309880000, offset: -1, offset_end: -1, flags: 00002000
delta-unit ) 0x7fb5880033a0
 /GstPipeline:pipeline0/GstIdentity:identity0: last-message = chain   *******
(identity0:sink) (239 bytes, dts: 0:00:00.327920000, pts: 0:00:00.327920000,
duration: 0:00:00.309060000, offset: -1, offset_end: -1, flags: 00002000
delta-unit ) 0x7fb588003180

mxf says:

 /GstPipeline:pipeline0/GstIdentity:identity0: last-message = chain   *******
(identity0:sink) (240 bytes, dts: 0:00:00.033333333, pts: 0:00:00.033333333,
duration: 0:00:00.033333333, offset: -1, offset_end: -1, flags: 00004000
tag-memory ) 0x7f379c003340
 /GstPipeline:pipeline0/GstIdentity:identity0: last-message = chain   *******
(identity0:sink) (239 bytes, dts: 0:00:00.066666666, pts: 0:00:00.066666666,
duration: 0:00:00.033333334, offset: -1, offset_end: -1, flags: 00004000
tag-memory ) 0x7f379c003560


I didn't check the file to see if the mux or demux is the issue.

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