Increase the SDP buffer size (again!) and also increase the temporary

buffer size of the fmtp parameter buffer. For Vorbis RT(S)P, these
contain full Vorbis headers, which can be up to 12kb each, formatted
in base64, so 16kb total. Patch required for proper Vorbis/RTP playback,
submitted as GSoC qualification task in the thread "RTP/Vorbis payload
implementation (GSoC qual task)" by Colin McQuillan m.niloc googlemail
com.

Originally committed as revision 18508 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/rtsp.c

@@ -261,7 +261,9 @@ int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *va
 static void sdp_parse_fmtp(AVStream *st, const char *p)
 {
     char attr[256];
-    char value[4096];
+    /* Vorbis setup headers can be up to 12KB and are sent base64
+     * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
+    char value[16384];
     int i;
 
     RTSPStream *rtsp_st = st->priv_data;
@@ -512,8 +514,10 @@ static int sdp_parse(AVFormatContext *s, const char *content)
      * contain long SDP lines containing complete ASF Headers (several
      * kB) or arrays of MDPR (RM stream descriptor) headers plus
      * "rulebooks" describing their properties. Therefore, the SDP line
-     * buffer is large. */
-    char buf[8192], *q;
+     * buffer is large.
+     *
+     * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
+    char buf[16384], *q;
     SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
 
     memset(s1, 0, sizeof(SDPParseState));