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Bug 720190 - decoder: h264: failed to decode BA3_SVA_C.264
decoder: h264: failed to decode BA3_SVA_C.264
Status: RESOLVED FIXED
Product: gstreamer-vaapi
Classification: Other
Component: general
git master
Other Linux
: Normal normal
: ---
Assigned To: gstreamer-vaapi maintainer(s)
gstreamer-vaapi maintainer(s)
Depends on:
Blocks: 719412
 
 
Reported: 2013-12-10 13:20 UTC by Gwenole Beauchesne
Modified: 2013-12-10 14:33 UTC
See Also:
GNOME target: ---
GNOME version: ---


Description Gwenole Beauchesne 2013-12-10 13:20:12 UTC 
This is a follow-up to the following bug:
https://bugs.freedesktop.org/show_bug.cgi?id=59540

Extended profile is indeed not supported. However, the indicated bitstream from conformance tests (BA3_SVA_C.264) has the constraint_set1_flag set to 1. As such, the stream hereby conforms to A.2.2 limits, which boils down to main profile.

In summary, we should try to handle fall-backs from Extended profile to Main profile if constraint_set1_flag is set to 1.
Comment 1 Gwenole Beauchesne 2013-12-10 14:33:46 UTC 
commit 1dd89800b0e895b0b699889c3ef4617dca95c6c5
Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Date:   Tue Dec 10 14:20:55 2013 +0100

    decoder: h264: fix decoding of BA3_SVA_C.264.
    
    Conformance test Base_Ext_Main_profiles/BA3_SVA_C.264 complys with
    extended profile specifications. However, the SPS header has the
    constraint_set1_flag syntax element set to 1. This means that, if
    a Main profile compliant decoder is available, then it should be
    able to decode this stream.
    
    This changes makes it possible to fall-back from Extended profile
    to Main profile if constraint_set1_flag is set to 1.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=720190