id summary reporter owner description type status priority milestone component version resolution keywords cc 152 Sub-PU TMVP can generate an invalid inter candidate bheng "In UnitTools.cpp, in the function getInterMergeSubPuMvpCand(): {{{ if (colMi.isInter ... ) { for (unsigned currRefListId = 0; currRefListId < (bBSlice ? 2 : 1); currRefListId++) { RefPicList currRefPicList = RefPicList(currRefListId); if (deriveScaledMotionTemporal(…)) { … } } } else { // intra coded, in this case, no motion vector is available for list 0 or list 1, so use default … } }}} The code above can generate a inter motion vector with no valid reference frame (all refIdx = -1). Assume the first if() condition passes (i.e. colMi.isInter) and the second if() condition fails. For example, if the current slice is a P-slice and deriveScaledMotionTemporal() returns false for List0 because colMi contains only List1 motion, getCheckLDC()=0, and bAllowMirrorMV=0. In this situation, the code above will never run the else( ) condition that assigns the default motion instead. An inter motion vector will be assigned with no valid reference index (refIdxL0=-1 and refIdxL1=-1). " defect closed minor VTM VTM-3.0 fixed ksuehring XiangLi fbossen jvet@…