我在Android中使用VideoView成功播放了wowza视频。现在我得处理我的服务器，UDP端口似乎被阻止了。使用openRTSP命令的证明：
-> % openRTSP rtsp://61.218.52.250:554/live/ch00_0
Opening connection to 61.218.52.250, port 554...
...remote connection opened
Sending request: OPTIONS rtsp://61.218.52.250:554/live/ch00_0 RTSP/1.0
CSeq: 2
User-Agent: openRTSP (LIVE555 Streaming Media v2013.12.16)
Received 105 new bytes of response data.
Received a complete OPTIONS response:
RTSP/1.0 200 OK
CSeq: 2
Server: UBNT Streaming Server v1.2
Public: DESCRIBE, SETUP, TEARDOWN, PLAY
Sending request: DESCRIBE rtsp://61.218.52.250:554/live/ch00_0 RTSP/1.0
CSeq: 3
User-Agent: openRTSP (LIVE555 Streaming Media v2013.12.16)
Accept: application/sdp
Received 562 new bytes of response data.
Received a complete DESCRIBE response:
RTSP/1.0 200 OK
CSeq: 3
Server: UBNT Streaming Server v1.2
Content-Base: rtsp://61.218.52.250:554/live/ch00_0/
Content-Type: application/sdp
Content-Length: 393
v=0
o=- 1 1 IN IP4 127.0.0.1
s=Ubiquiti Live
i=UBNT Streaming Media
c=IN IP4 0.0.0.0
t=0 0
m=video 0 RTP/AVP 99
b=AS:50000
a=framerate:25
a=x-dimensions:1280,720
a=x-vendor-id:ubnt,a521
a=x-rtp-ts:4617405454576779984
a=rtpmap:99 H264/90000
a=fmtp:99 profile-level-id=42A01E;packetization-mode=1;sprop-parameter-sets=Z0IAKOkAoAt1xIAG3dAAzf5gDYgQlA==,aM4xUg==
a=control:trackID=0
Opened URL "rtsp://61.218.52.250:554/live/ch00_0", returning a SDP description:
v=0
o=- 1 1 IN IP4 127.0.0.1
s=Ubiquiti Live
i=UBNT Streaming Media
c=IN IP4 0.0.0.0
t=0 0
m=video 0 RTP/AVP 99
b=AS:50000
a=framerate:25
a=x-dimensions:1280,720
a=x-vendor-id:ubnt,a521
a=x-rtp-ts:4617405454576779984
a=rtpmap:99 H264/90000
a=fmtp:99 profile-level-id=42A01E;packetization-mode=1;sprop-parameter-sets=Z0IAKOkAoAt1xIAG3dAAzf5gDYgQlA==,aM4xUg==
a=control:trackID=0
Created receiver for "video/H264" subsession (client ports 63346-63347)
Sending request: SETUP rtsp://61.218.52.250:554/live/ch00_0/trackID=0 RTSP/1.0
CSeq: 4
User-Agent: openRTSP (LIVE555 Streaming Media v2013.12.16)
Transport: RTP/AVP;unicast;client_port=63346-63347
Received 47 new bytes of response data.
Received a complete SETUP response:
RTSP/1.0 461 Unsupported Transport
CSeq: 4
Failed to setup "video/H264" subsession: 461 Unsupported Transport
搜索后我发现它似乎Android still not support RTSP over TCP：
使用RTSP / RTP流式传输到Android设备时，RTP部分 必须流过UDP。 Android不支持RTSP / RTP交错（RTP 通过TCP）。这意味着如果UDP不可用于RTP播放，则为RTP 通过TCP将不能用作故障转移，您的流将无法播放。
考虑到它是在2010年发布的，Android 4.x现在是否支持TCP上的RTSP？我发现很多帖子询问如何强制通过TCP以外的TCP传输。我猜不是。
如果没有，我可以通过重新编译和使用ffmpeg库来实现吗？
基本上我希望ffmpeg可以帮助我在UDP不可用时自动切换到TCP。