static u32 merge_hevc_config(GF_ISOFile *dest, u32 tk_id, GF_ISOFile *orig, u32 src_track, Bool force_cat)
{
	u32 i;
	GF_HEVCConfig *hevc_src, *hevc_dst;
	u32 dst_tk = gf_isom_get_track_by_id(dest, tk_id);

	hevc_src = gf_isom_hevc_config_get(orig, src_track, 1);
	hevc_dst = gf_isom_hevc_config_get(dest, dst_tk, 1);

	if (hevc_src->profile_idc != hevc_dst->profile_idc) dst_tk = 0;
	else if (hevc_src->level_idc != hevc_dst->level_idc) dst_tk = 0;
	else if (hevc_src->general_profile_compatibility_flags != hevc_dst->general_profile_compatibility_flags ) dst_tk = 0;
	else {
		/*rewrite all samples if using different NALU size*/
		if (hevc_src->nal_unit_size > hevc_dst->nal_unit_size) {
			gf_media_avc_rewrite_samples(dest, dst_tk, 8*hevc_dst->nal_unit_size, 8*hevc_src->nal_unit_size);
			hevc_dst->nal_unit_size = hevc_src->nal_unit_size;
		} else if (hevc_src->nal_unit_size < hevc_dst->nal_unit_size) {
			gf_media_avc_rewrite_samples(orig, src_track, 8*hevc_src->nal_unit_size, 8*hevc_dst->nal_unit_size);
		}

		/*merge PS*/
		for (i=0; i<gf_list_count(hevc_src->param_array); i++) {
			u32 k;
			GF_HEVCParamArray *src_ar = gf_list_get(hevc_src->param_array, i);
			for (k=0; k<gf_list_count(hevc_dst->param_array); k++) {
				GF_HEVCParamArray *dst_ar = gf_list_get(hevc_dst->param_array, k);
				if (dst_ar->type==src_ar->type) {
					if (!merge_parameter_set(src_ar->nalus, dst_ar->nalus, "SPS"))
						dst_tk = 0;
					break;
				}
			}
		}

		gf_isom_hevc_config_update(dest, dst_tk, 1, hevc_dst);
	}

	gf_odf_hevc_cfg_del(hevc_src);
	gf_odf_hevc_cfg_del(hevc_dst);

	if (!dst_tk) {
		dst_tk = gf_isom_get_track_by_id(dest, tk_id);
		gf_isom_set_nalu_extract_mode(orig, src_track, GF_ISOM_NALU_EXTRACT_INBAND_PS_FLAG);
		if (!force_cat) {
			gf_isom_hevc_set_inband_config(dest, dst_tk, 1);
		} else {
			fprintf(stderr, "WARNING: Concatenating track ID %d even though sample descriptions do not match\n", tk_id);
		}
	}
	return dst_tk;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.