diff --git a/skyscraper8/GS/GSE-BFBS/BfbsGseReader.cs b/skyscraper8/GS/GSE-BFBS/BfbsGseReader.cs
index d201240..0405003 100644
--- a/skyscraper8/GS/GSE-BFBS/BfbsGseReader.cs
+++ b/skyscraper8/GS/GSE-BFBS/BfbsGseReader.cs
@@ -17,6 +17,7 @@ namespace skyscraper8.GS.GSE_BFBS
 		private readonly ISubTsHandler _subTsHandler;
 
 		private GseLabel lastLabel;
+		private int frameNo;
 
 		public BfbsGseReader(byte misId, ISubTsHandler subTsHandler)
 		{
@@ -26,6 +27,7 @@ namespace skyscraper8.GS.GSE_BFBS
 
 		public void PushFrame(BBHeader bbHeader, ReadOnlySpan<byte> readOnlySpan)
 		{
+			frameNo++;
 			bool validCrc = DvbCrc32.ValidateCrc(readOnlySpan);
 			if (!validCrc)
 				return;
@@ -36,7 +38,7 @@ namespace skyscraper8.GS.GSE_BFBS
 
 			StreamlikeSpan span = new StreamlikeSpan(readOnlySpan);
 
-			while (span.GetAvailableBytes() >= 1)
+			while (span.GetAvailableBytes() > 4)
 			{
 				byte byteA = span.ReadUInt8();
 				bool startIndicator = (byteA & 0x80) != 0;
@@ -97,21 +99,20 @@ namespace skyscraper8.GS.GSE_BFBS
 
 					ReadOnlySpan<byte> gseDataBytes = span.ReadBytes(gseLength);
 
+					uint? crc32 = null;
 					if (!startIndicator && endIndicator)
 					{
-						uint crc32 = span.ReadUInt32BE();
-						throw new NotImplementedException("crc32");
+						crc32 = span.ReadUInt32BE();
 					}
 
-					HandleGseFrame(startIndicator, endIndicator, fragId, totalLength, label, protocolType,
-						gseDataBytes);
+					HandleGseFrame(startIndicator, endIndicator, fragId, totalLength, label, protocolType, gseDataBytes, crc32);
 				}
 			}
 		}
 
-		private void HandleGseFrame(bool startIndicator, bool endIndicator, byte? fragId, ushort? totalLength, GseLabel label, ushort? protocolType, ReadOnlySpan<byte> gseDataBytes)
+		private void HandleGseFrame(bool startIndicator, bool endIndicator, byte? fragId, ushort? totalLength, GseLabel label, ushort? protocolType, ReadOnlySpan<byte> gseDataBytes, uint? crc32)
 		{
-			throw new NotImplementedException();
+			//throw new NotImplementedException();
 		}
 	}
 }