[Bug 786797] New: codecparsers: h264: store SPS's and subset SPS's separately

GStreamer (GNOME Bugzilla) bugzilla at gnome.org
Fri Aug 25 11:42:33 UTC 2017


https://bugzilla.gnome.org/show_bug.cgi?id=786797

            Bug ID: 786797
           Summary: codecparsers: h264: store SPS's and subset SPS's
                    separately
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: orestisf1993 at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com
     GNOME version: ---

>From the H264 spec: H.7.4.1.2.1 - Order of MVC sequence parameter set RBSPs and
picture parameter set RBSPs and their activation:

> NOTE 5 – A decoder must be capable of simultaneously storing the contents of the sequence parameter sets and subset sequence
> parameter sets for all values of seq_parameter_set_id. The content of the sequence parameter set with a particular value of
> seq_parameter_set_id is overwritten when a new sequence parameter set NAL unit with the same value of seq_parameter_set_id is
> received, and the content of the subset sequence parameter set with a particular value of seq_parameter_set_id is overwritten when
> a new subset sequence parameter set NAL unit with the same value of seq_parameter_set_id is received.

This should also be required for parsing SVC streams.

Some discussion in bug 732266:
https://bugzilla.gnome.org/show_bug.cgi?id=732266#c36

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