[Bug 785985] New: vaapi decoder/h264parse: renegotiation always happens whenever SPS/SPS subset arrives in case of MVC stream

["GStreamer" (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=785985

Bug ID: 785985
Summary: vaapi decoder/h264parse: renegotiation always happens
whenever SPS/SPS subset arrives in case of MVC stream
Classification: Platform
Product: GStreamer
Version: git master
OS: Linux
Status: NEW
Severity: normal
Priority: Normal
Component: gstreamer-vaapi
Assignee: gstreamer-***@lists.freedesktop.org
Reporter: ***@igalia.com
QA Contact: gstreamer-***@lists.freedesktop.org
CC: ***@gmail.com, ***@igalia.com
GNOME version: ---

Reproduce step (should be on the master):
1\ Produces MVC stream

gst-launch-1.0 -v videotestsrc pattern=ball name=left \
videotestsrc name=right glstereomix name=mix \
left. ! video/x-raw,width=640,height=480! glupload ! mix. \
right. ! video/x-raw,width=640,height=480! glupload ! mix. \
mix. ! video/x-raw'(memory:GLMemory)',multiview-mode=frame-by-frame ! \
queue ! glcolorconvert ! gldownload ! vaapih264enc num-views=2 !
filesink location=output_va.264

2\ Play the stream with glimagesink
gst-play-1.0 output_va.264 --videosink="glimagesink
output-multiview-mode=side-by-side"


The produced stream by vaapih264enc contains IDR following SPS/SPS subset
periodically (per every 1 sec), which leads to renegotiation from h264parse
whenever SPS/SPS subset arrives in the middle of stream.
Because h264parse determines whether to update src cpas or not with current src
caps, which is always different from current sps.

For example,
If current sps is SPS for base view, current src caps is from sps subset.
If curresnt sps is SPS subset for dependant view, current src caps is from sps.

So h264parse always updates src caps to profile high if SPS, and then updates
to profile stereo-high again if sps susbset.
I expect this shouldn't happen if it's on the same stream.

Does h264parse need to something more for this case?
Or decoder should be handling this case?

["GStreamer" (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=785985

GStreamer system administrator <***@gstreamer.net> changed:

What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |OBSOLETE

--- Comment #1 from GStreamer system administrator <***@gstreamer.net> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance:
https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi/issues/65.