rtmp: Follow Flash player numbering for channels.

Channel 4 is typically used by the Flash player to transmit
audio, channel 6 for video, and various stream-specific invokes
get sent over channel 8, which is designated the source channel.

This more closely matches the behavior of the Flash player,
including the transmission of play requests over channel 8.
Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/rtmppkt.h

@@ -36,9 +36,9 @@
 enum RTMPChannel {
     RTMP_NETWORK_CHANNEL = 2,   ///< channel for network-related messages (bandwidth report, ping, etc)
     RTMP_SYSTEM_CHANNEL,        ///< channel for sending server control messages
-    RTMP_SOURCE_CHANNEL,        ///< channel for sending a/v to server
-    RTMP_VIDEO_CHANNEL = 8,     ///< channel for video data
     RTMP_AUDIO_CHANNEL,         ///< channel for audio data
+    RTMP_VIDEO_CHANNEL   = 6,   ///< channel for video data
+    RTMP_SOURCE_CHANNEL  = 8,   ///< channel for a/v invokes
 };
 
 /**

libavformat/rtmpproto.c

@@ -693,7 +693,7 @@ static int gen_play(URLContext *s, RTMPContext *rt)
 
     av_log(s, AV_LOG_DEBUG, "Sending play command for '%s'\n", rt->playpath);
 
-    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_VIDEO_CHANNEL, RTMP_PT_INVOKE,
+    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SOURCE_CHANNEL, RTMP_PT_INVOKE,
                                      0, 29 + strlen(rt->playpath))) < 0)
         return ret;
 
@@ -2637,7 +2637,7 @@ static int rtmp_write(URLContext *s, const uint8_t *buf, int size)
         if (rt->flv_header_bytes < 11) {
             const uint8_t *header = rt->flv_header;
             int copy = FFMIN(11 - rt->flv_header_bytes, size_temp);
-            int channel = RTMP_SOURCE_CHANNEL;
+            int channel = RTMP_AUDIO_CHANNEL;
             bytestream_get_buffer(&buf_temp, rt->flv_header + rt->flv_header_bytes, copy);
             rt->flv_header_bytes += copy;
             size_temp            -= copy;