Ticket #1620: parcat_fix.patch

--- a/source/App/Parcat/parcat.cpp
+++ b/source/App/Parcat/parcat.cpp
@@ -220,6 +220,7 @@ std::vector<uint8_t> filter_segment(const std::vector<uint8_t> & v, int idx, int
 
   int bits_for_poc = 8;
   bool skip_next_sei = false;
+  bool skip_first_prefix_sei = idx > 1;
   bool change_poc = false;
   bool first_idr_slice_after_ph_nal = false;
 
@@ -331,7 +332,7 @@ std::vector<uint8_t> filter_segment(const std::vector<uint8_t> & v, int idx, int
     }
     if ((idx > 1 && (nalu_type == NAL_UNIT_CODED_SLICE_IDR_W_RADL || nalu_type == NAL_UNIT_CODED_SLICE_IDR_N_LP)) 
       || ((idx > 1 && !idr_found) && (nalu_type == NAL_UNIT_OPI || nalu_type == NAL_UNIT_DCI || nalu_type == NAL_UNIT_VPS || nalu_ty
pe == NAL_UNIT_SPS || nalu_type == NAL_UNIT_PPS || nalu_type == NAL_UNIT_PREFIX_APS || nalu_type == NAL_UNIT_SUFFIX_APS || nalu_type 
== NAL_UNIT_PH || nalu_type == NAL_UNIT_ACCESS_UNIT_DELIMITER)) 
-      || (nalu_type == NAL_UNIT_SUFFIX_SEI && skip_next_sei))
+      || ((nalu_type == NAL_UNIT_SUFFIX_SEI) && skip_next_sei) || ((nalu_type == NAL_UNIT_PREFIX_SEI) && skip_first_prefix_sei))
     {
     }
     else
@@ -344,6 +345,10 @@ std::vector<uint8_t> filter_segment(const std::vector<uint8_t> & v, int idx, int
     {
       skip_next_sei = false;
     }
+    if(nalu_type == NAL_UNIT_PREFIX_SEI && skip_first_prefix_sei)
+    {
+      skip_first_prefix_sei = false;
+    }
 
 
     p += (nal_end - nal_start);