id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
978	Encoder crashes with HRD for the last GOP of the sequence and decoder crashes with HRD	vdrugeon		"When HRD timing information is used and the last GOP of the sequence is not a full GOP, VTM encoder crashes with the following error:
ERROR: In function ""xCreatePictureTimingSEI"" in /data/VTM_dev/CreateMergeRequests/source/Lib/EncoderLib/EncGOP.cpp:962: m_cpbRemovalDelayDeltaIdx not applicable for the sub-layer and GOP size

The following command line shows the error:
./EncoderAppStatic -c ../cfg/encoder_randomaccess_vtm.cfg -c ../cfg/sei_vui/timing.cfg -c ../cfg/per-sequence/BlowingBubbles.cfg -f 12 --SEIDecodedPictureHash=1

This is because the CPB removal delay delta idx do not follow the same pattern as for full GOP in such a case. It is therefore suggested to solve this issue by not using the CPB removal delay delta idx for the last GOP of the picture in EncGOP::xCreatePictureTimingSEI, but signal the CPB removal delays directly instead.
 
A second issue is that bitstreams encoded with buffering period and picture timing SEI messages make the decoder crash in the function DecLib::checkSEIInAccessUnit. This function checks information from the VPS, but does not check that a VPS is available in the bistream. It is suggested to add a check that m_vps is not equal to nullptr before accessing the information in m_vps.
"	defect	closed	minor	VTM-8.1	VTM	VTM-8.0	fixed		ksuehring XiangLi fbossen jvet@…