added lua script for parsing video in wireshark

LuaScripts/NVStreamVideoPacket.lua

@@ -0,0 +1,71 @@
+-- Nvidia Streaming Video Packet Dissector
+-- Version: 1.0
+-- Diego Waxemberg
+
+-- video header
+local nvHeader_unknown = ProtoField.bytes("nv.unknown", "Unknown") -- 12 bytes
+local nvHeader_frame = ProtoField.uint16("nv.frame", "Frame", base.HEX) -- 2 bytes
+local nvHeader_garbage = ProtoField.bytes("nv.garbage", "Garbage") --14 bytes
+local nvHeader_length = ProtoField.uint16("nv.length", "Length", base.HEX) -- 2 bytes
+local nvHeader_moregarbage = ProtoField.bytes("nv.moregarbage", "More Garbage") --23 bytes
+local nvHeader_start = ProtoField.uint32("nv.start", "Start", base.HEX) -- 4 bytes
+
+-- video data
+local nvVideo_data = ProtoField.bytes("nv.data", "Data") -- rest
+
+p_nv = Proto("nv", "Nvidia Video Stream Protocol")
+p_nv.fields = {
+    nvHeader_unknown,
+    nvHeader_frame,
+    nvHeader_garbage,
+    nvHeader_length,
+    nvHeader_moregarbage,
+    nvHeader_start,
+    nvVideo_data
+    }
+
+function p_nv.dissector(buf, pkt, root)
+    pkt.cols.protocol = p_nv.name
+    subtree = root:add(p_nv, buf(0))
+        
+    i = 0
+    -- unknown
+    unknown = buf(i, 12):bytes()
+    subtree:add(nvHeader_unknown, buf(i, 12))
+    i = i + 12
+
+    -- frame
+    frame = buf(i, 2):le_uint()
+    subtree:add(nvHeader_frame, buf(i, 2), frame)
+    i = i + 2
+    
+    -- garbage
+    garbage = buf(i, 14):bytes()
+    subtree:add(nvHeader_garbage, buf(i, 14))
+    i = i + 14
+    
+    -- length
+    length = buf(i, 2):le_uint()
+    subtree:add(nvHeader_length, buf(i, 2), length)
+    i = i + 2
+    
+    -- moregarbage
+    moregarbage = buf(i, 23):bytes()
+    subtree:add(nvHeader_moregarbage, buf(i, 23))
+    i = i + 23
+    
+    -- start
+    start = buf(i, 4):uint()
+    subtree:add(nvHeader_start, buf(i, 4), start)
+    i = i + 4
+    
+    -- data
+    data = buf(i, buf:len()-i):bytes()
+    subtree:add(nvVideo_data, buf(i, buf:len()-i))
+end
+
+function p_nv.init()
+end
+
+local udp_dissector_table = DissectorTable.get("udp.port")
+udp_dissector_table:add(47998, p_nv)