[gstreamer-bugs] [Bug 575738] New: mpeg2enc's aspect parameter does not work properly

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-bad | Ver: 0.10.10
           Summary: mpeg2enc's aspect parameter does not work properly
           Product: GStreamer
           Version: 0.10.10
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: gnucash at thoth.purplefrog.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


I did a reencode of video with aspect=2 but when I examine the sequence header
the aspect_ratio_information field is 12, not 2. According to table 6-3 of ISO
13818-2 12 is a reserved value.  Also, it is not what I specified.

In addition, the documentation gst-inspect shows for aspect= might be slightly
misleading.  When aspect_ratio_information==1 it means that the pixels are
square, not that the width:height ratio is 1:1.  An 800x400 video with
aspect_ratio_information==1 will be very rectangular and not in the least bit
square.


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