syntax highlighting in the README

README.md

@@ -2,10 +2,11 @@
 codec
 ====
 
-Golang aac/h264 encoder and decoder
+Golang aac/h264 encoder and decoder.
 
-H264 encoding example
+H264 encoding example:
 
+```go
 w := 400
 h := 400
 var nal [][]byte 
@@ -28,9 +29,11 @@ H264 encoding example
 	}
 	nal = append(nal, p.Data)
 }
+```
 
-H264 decoding example
+H264 decoding example:
 
+```go
 dec, err := codec.NewH264Decoder(nal[0])
 for i, n := range nal[1:] {
 	img, err := dec.Decode(n)
@@ -40,9 +43,11 @@ H264 decoding example
 		fp.Close()
 	}
 }
+```
 
-AAC encoding example
+AAC encoding example:
 
+```go
 var pkts [][]byte 
 
 c, _ := codec.NewAACEncoder()
@@ -55,11 +60,13 @@ AAC encoding example
 		pkts = append(pkts, p)
 	}
 }
+```
 
-AAC decoding example
+AAC decoding example:
 
+```go
 dec, _ := codec.NewAACDecoder(pkts[0])
 for _, p := range pkts[1:] {
 	sample, err := dec.Decode(p)
 }
-
+```