In EncAdaptiveLoopFilter.cpp, function mergeClasses contains following copy

std::copy_n(clipMerged[numRemaining - 1][0], MAX_NUM_ALF_CLASSES * MAX_NUM_ALF_LUMA_COEFF,

clipMerged[numRemaining - 2][0]);

Encoder crashed here, problem seems to be that 1D copy is performed instead of 2D. Address may not be contiguous. This issue is present in latest VTM22.0.

In VVCD5, the inverse angle parameter invAngle is derived based on intraPredAngle as follows: invAngle = Round((256*32)/"intraPredAngle" ) However, in VTM-5.0, the invAngle should be 161 when intraPredAngle equals to 51 rather than 160.

Problem statement: In spec S2001-v1 (Table 131 – Assignment of ctxInc to syntax elements with context coded bins), the ctxInc for syntax element intra_luma_not_planar_flag (only one bin) is specified as intra_subpartitions_mode_flag, which means if "intra_subpartitions_mode_flag" is 1 (ISP mode), ctxInc is 1 and if "intra_subpartitions_mode_flag" is 0 (non-ISP) ctxInc is 0.

However, in the latest VTM (commit id: cb7b243e), the ctxInc for intra_luma_not_planar_flag is computed in the other way around (shown below, 1384 line of CABACReader.cpp).

unsigned ctx = (pu->cu->ispMode == NOT_INTRA_SUBPARTITIONS ? 1 : 0);

It can be seen that if current CU uses ISP mode (pu->cu->ispMode == NOT_INTRA_SUBPARTITIONS is FALSE), the ctxInc is 0 and if current CU uses non-ISP mode (pu->cu->ispMode == NOT_INTRA_SUBPARTITIONS is TRUE), the ctxInc is 1.

Suggestion: Aligning spec with SW, i.e., specify the ctxInc for intra_luma_not_planar_flag as !intra_subpartitions_mode_flag in spec.