for ExoPlayer, add av tag in flv header. 2.0.197

@@ -336,6 +336,7 @@ Remark:
 
 ## History
 
+* v2.0, 2015-10-28, for [ExoPlayer #828][exo #828], add av tag in flv header. 2.0.197
 * v2.0, 2015-10-27, for [#512][bug #512] partical hotfix the hls pure audio. 2.0.196
 * <strong>v2.0, 2015-10-08, [2.0 alpha2(2.0.195)][r2.0a2] released. 89358 lines.</strong>
 * v2.0, 2015-10-04, for [#448][bug #448] fix the bug of response of http hooks. 2.0.195
@@ -1199,6 +1200,8 @@ Winlin
 [bug #512]: https://github.com/simple-rtmp-server/srs/issues/512
 [bug #xxxxxxxxxx]: https://github.com/simple-rtmp-server/srs/issues/xxxxxxxxxx
 
+[exo #828]: https://github.com/google/ExoPlayer/pull/828
+
 [r2.0a2]: https://github.com/simple-rtmp-server/srs/releases/tag/v2.0-a2
 [r2.0a1]: https://github.com/simple-rtmp-server/srs/releases/tag/2.0a1
 [r2.0a0]: https://github.com/simple-rtmp-server/srs/releases/tag/2.0a0

@@ -381,7 +381,7 @@ int SrsFlvEncoder::write_header()
     char flv_header[] = {
         'F', 'L', 'V', // Signatures "FLV"
         (char)0x01, // File version (for example, 0x01 for FLV version 1)
-        (char)0x00, // 4, audio; 1, video; 5 audio+video.
+        (char)0x05, // 4, audio; 1, video; 5 audio+video.
         (char)0x00, (char)0x00, (char)0x00, (char)0x09 // DataOffset UI32 The length of this header in bytes
     };