上海电信RTSP播放5分钟就断开

[lucawong]

日志如下，很奇怪的是刚刚抓取的日志，时间却对应不上。不知道什么情况。

03:52:03 INFO [Worker 0] New client 192.168.2.14:37462 requested URL: /rtsp/222.68.211.94:554/SHDXFH_live/00000001000000050000000005000012?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff (method: GET)
03:52:03 DEBUG [Worker 0] r2h-token validated (source: query)
03:52:03 DEBUG [Worker 0] Parsed RTSP URL: rtsp://222.68.211.94:554/SHDXFH_live/00000001000000050000000005000012?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff
03:52:03 DEBUG [Worker 0] Timezone: No TZ marker in User-Agent
03:52:03 DEBUG [Worker 0] RTSP: Parsed URL - host=222.68.211.94, port=554, path=/SHDXFH_live/00000001000000050000000005000012?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff
03:52:03 DEBUG [Worker 0] RTSP: Connection to 222.68.211.94:554 in progress (async)
03:52:03 DEBUG [Worker 0] RTSP: Socket registered with epoll for connection completion
03:52:03 DEBUG [Worker 0] RTSP: Async connection initiated, state=1
03:52:03 INFO [Worker 0] RTSP: Connected to 222.68.211.94:554
03:52:03 DEBUG [Worker 0] RTSP: Connection to 222.68.211.94:554 completed successfully
03:52:03 DEBUG [Worker 0] RTSP: Prepared request:
OPTIONS rtsp://222.68.211.94/SHDXFH_live/00000001000000050000000005000012?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff RTSP/1.0
CSeq: 1
User-Agent: rtp2httpd/3.8.3

03:52:03 DEBUG [Worker 0] RTSP: Request sent completely (271 bytes)
03:52:03 DEBUG [Worker 0] RTSP: Request sent completely, waiting for response
03:52:03 DEBUG [Worker 0] RTSP: Server does not advertise GET_PARAMETER, will use OPTIONS for keepalive
03:52:03 DEBUG [Worker 0] RTSP: Server advertised methods: DESCRIBE, OPTIONS, SETUP
03:52:03 DEBUG [Worker 0] RTSP: Received complete header:
RTSP/1.0 200 OK
CSeq: 1
Server: FonsView SERVER/1.0
Date: Mon, 09 Feb 2026 11:00:49 GMT
Public: DESCRIBE, OPTIONS, SETUP

03:52:03 DEBUG [Worker 0] RTSP: Prepared request:
DESCRIBE rtsp://222.68.211.94/SHDXFH_live/00000001000000050000000005000012?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff RTSP/1.0
CSeq: 2
User-Agent: rtp2httpd/3.8.3
Accept: application/sdp

03:52:03 DEBUG [Worker 0] RTSP: Request sent completely (297 bytes)
03:52:03 DEBUG [Worker 0] RTSP: Request sent completely, waiting for response
03:52:03 DEBUG [Worker 0] RTSP: Received redirect response 302
03:52:03 DEBUG [Worker 0] RTSP: Handling redirect to: rtsp://124.75.28.84:554/SHDXFH_live/00000001000000050000000005000012?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff
03:52:03 DEBUG [Worker 0] RTSP: Parsed URL - host=124.75.28.84, port=554, path=/SHDXFH_live/00000001000000050000000005000012?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff
03:52:03 DEBUG [Worker 0] RTSP: Connection to 124.75.28.84:554 in progress (async)
03:52:03 DEBUG [Worker 0] RTSP: Socket registered with epoll for connection completion
03:52:03 INFO [Worker 0] RTSP: Redirect to 124.75.28.84:554 initiated (redirect #1)
03:52:03 DEBUG [Worker 0] RTSP: Received complete header:
RTSP/1.0 302 Moved Temporarily
CSeq: 2
Server: FonsView SERVER/1.0
Date: Mon, 09 Feb 2026 11:00:49 GMT
Location: rtsp://124.75.28.84:554/SHDXFH_live/00000001000000050000000005000012?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff

03:52:03 DEBUG [Worker 0] Client disconnected
03:52:03 INFO [Worker 0] RTSP: Cleanup requested in state 13, initiating TEARDOWN
03:52:03 DEBUG [Worker 0] RTSP: Prepared request:
TEARDOWN rtsp://124.75.28.37:55554/LIVE/1219885?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff&TRANSPORT=MP2T/TCP&DURATION=20260209T100029Z-20260209T110029Z&LID=1219885&Provider_id=SHDXFH_live&Pcontent_id=00000001000000050000000005000012&FvSeid=481aa29bcfdadef7&FvTSDesb=1770634829-949974&TSDescribeResp=1770634829-958362 RTSP/1.0
CSeq: 9
User-Agent: rtp2httpd/3.8.3
Session: 310033631

03:52:03 DEBUG [Worker 0] RTSP: TEARDOWN request prepared, will send asynchronously
03:52:03 DEBUG [Worker 0] RTSP: TEARDOWN initiated, waiting for async completion
03:52:03 DEBUG [Worker 0] Stream: RTSP async TEARDOWN initiated, deferring final cleanup
03:52:03 DEBUG [Worker 0] Worker: Async RTSP TEARDOWN initiated, deferring connection cleanup
03:52:03 DEBUG [Worker 0] Worker: Deferred cleanup - waiting for RTSP TEARDOWN completion
03:52:03 DEBUG [Worker 0] RTSP: Request sent completely (492 bytes)
03:52:03 DEBUG [Worker 0] RTSP: Request sent completely, waiting for response
03:52:03 INFO [Worker 0] RTSP: Connected to 124.75.28.84:554
03:52:03 DEBUG [Worker 0] RTSP: Connection to 124.75.28.84:554 completed successfully
03:52:03 DEBUG [Worker 0] RTSP: Prepared request:
OPTIONS rtsp://124.75.28.84/SHDXFH_live/00000001000000050000000005000012?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff RTSP/1.0
CSeq: 3
User-Agent: rtp2httpd/3.8.3

03:52:03 DEBUG [Worker 0] RTSP: Request sent completely (270 bytes)
03:52:03 DEBUG [Worker 0] RTSP: Request sent completely, waiting for response
03:52:03 DEBUG [Worker 0] RTSP: Buffer full with no RTSP header, discarding
03:52:03 DEBUG [Worker 0] RTSP: Buffer full with no RTSP header, discarding
03:52:03 DEBUG [Worker 0] RTSP: Server supports GET_PARAMETER for keepalive
03:52:03 DEBUG [Worker 0] RTSP: Server advertised methods: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, GET_PARAMETER, SET_PARAMETER
03:52:03 DEBUG [Worker 0] RTSP: Received complete header:
RTSP/1.0 200 OK
CSeq: 3
Server: FonsView SS/1.0
Date: Mon, 09 Feb 2026 11:00:49 GMT
Public: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, GET_PARAMETER, SET_PARAMETER

03:52:03 DEBUG [Worker 0] RTSP: Prepared request:
DESCRIBE rtsp://124.75.28.84/SHDXFH_live/00000001000000050000000005000012?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff RTSP/1.0
CSeq: 4
User-Agent: rtp2httpd/3.8.3
Accept: application/sdp

03:52:03 DEBUG [Worker 0] RTSP: Request sent completely (296 bytes)
03:52:03 DEBUG [Worker 0] RTSP: Request sent completely, waiting for response
03:52:03 DEBUG [Worker 0] RTSP: Received redirect response 302
03:52:03 DEBUG [Worker 0] RTSP: Handling redirect to: rtsp://124.75.28.73:55554/LIVE/1270332?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff&TRANSPORT=MP2T/TCP&DURATION=20260209T100049Z-20260209T110049Z&LID=1270332&Provider_id=SHDXFH_live&Pcontent_id=00000001000000050000000005000012&FvSeid=481aa2c27a137e53&FvTSDesb=1770634849-250011&TSDescribeResp=1770634849-262021
03:52:03 DEBUG [Worker 0] RTSP: Parsed URL - host=124.75.28.73, port=55554, path=/LIVE/1270332?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff&TRANSPORT=MP2T/TCP&DURATION=20260209T100049Z-20260209T110049Z&LID=1270332&Provider_id=SHDXFH_live&Pcontent_id=00000001000000050000000005000012&FvSeid=481aa2c27a137e53&FvTSDesb=1770634849-250011&TSDescribeResp=1770634849-262021
03:52:03 DEBUG [Worker 0] RTSP: Connection to 124.75.28.73:55554 in progress (async)
03:52:03 DEBUG [Worker 0] RTSP: Socket registered with epoll for connection completion
03:52:03 INFO [Worker 0] RTSP: Redirect to 124.75.28.73:55554 initiated (redirect #2)
03:52:03 DEBUG [Worker 0] RTSP: Received complete header:
RTSP/1.0 302 Moved Temporarily
CSeq: 4
Server: FonsView SS/1.0
Date: Mon, 09 Feb 2026 11:00:49 GMT
Location: rtsp://124.75.28.73:55554/LIVE/1270332?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff&TRANSPORT=MP2T/TCP&DURATION=20260209T100049Z-20260209T110049Z&LID=1270332&Provider_id=SHDXFH_live&Pcontent_id=00000001000000050000000005000012&FvSeid=481aa2c27a137e53&FvTSDesb=1770634849-250011&TSDescribeResp=1770634849-262021

03:52:03 INFO [Worker 0] RTSP: Connected to 124.75.28.73:55554
03:52:03 DEBUG [Worker 0] RTSP: Connection to 124.75.28.73:55554 completed successfully
03:52:03 DEBUG [Worker 0] RTSP: Prepared request:
OPTIONS rtsp://124.75.28.73:55554/LIVE/1270332?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff&TRANSPORT=MP2T/TCP&DURATION=20260209T100049Z-20260209T110049Z&LID=1270332&Provider_id=SHDXFH_live&Pcontent_id=00000001000000050000000005000012&FvSeid=481aa2c27a137e53&FvTSDesb=1770634849-250011&TSDescribeResp=1770634849-262021 RTSP/1.0
CSeq: 5
User-Agent: rtp2httpd/3.8.3

03:52:03 DEBUG [Worker 0] RTSP: Request sent completely (471 bytes)
03:52:03 DEBUG [Worker 0] RTSP: Request sent completely, waiting for response
03:52:03 INFO [Worker 0] RTSP: Server closed connection
03:52:03 DEBUG [Worker 0] RTSP: Server closed connection during TEARDOWN (acceptable)
03:52:03 DEBUG [Worker 0] RTSP: Main socket closed
03:52:03 DEBUG [Worker 0] RTSP: Session cleanup complete
03:52:03 DEBUG [Worker 0] RTSP: Graceful TEARDOWN completed
03:52:03 DEBUG [Worker 0] RTSP: Server supports GET_PARAMETER for keepalive
03:52:03 DEBUG [Worker 0] RTSP: Server advertised methods: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, GET_PARAMETER, SET_PARAMETER
03:52:03 DEBUG [Worker 0] RTSP: Received complete header:
RTSP/1.0 200 OK
CSeq: 5
Server: FonsView SS/1.0
Date: Mon, 09 Feb 2026 11:00:49 GMT
Public: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, GET_PARAMETER, SET_PARAMETER

03:52:03 DEBUG [Worker 0] RTSP: Prepared request:
DESCRIBE rtsp://124.75.28.73:55554/LIVE/1270332?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff&TRANSPORT=MP2T/TCP&DURATION=20260209T100049Z-20260209T110049Z&LID=1270332&Provider_id=SHDXFH_live&Pcontent_id=00000001000000050000000005000012&FvSeid=481aa2c27a137e53&FvTSDesb=1770634849-250011&TSDescribeResp=1770634849-262021 RTSP/1.0
CSeq: 6
User-Agent: rtp2httpd/3.8.3
Accept: application/sdp

03:52:03 DEBUG [Worker 0] RTSP: Request sent completely (497 bytes)
03:52:03 DEBUG [Worker 0] RTSP: Request sent completely, waiting for response
03:52:03 DEBUG [Worker 0] RTSP: Received complete header:
RTSP/1.0 200 OK
CSeq: 6
Server: FonsView SS/1.0
Date: Mon, 09 Feb 2026 11:00:49 GMT
Content-Type: application/sdp
Content-Length: 141
Content-Base: rtsp://124.75.28.73:55554/LIVE/1270332?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff&TRANSPORT=MP2T/TCP&DURATION=20260209T100049Z-20260209T110049Z&LID=1270332&Provider_id=SHDXFH_live&Pcontent_id=00000001000000050000000005000012&FvSeid=481aa2c27a137e53&FvTSDesb=1770634849-250011&TSDescribeResp=1770634849-262021

03:52:03 DEBUG [Worker 0] RTSP: Response body data (state=6): v=0
o=- 1 1 IN IP4 0.0.0.0
s=RTSP Session
t=0 0
c=IN IP4 0.0.0.0
m=video 0 RTP/AVP 33
a=range:clock=20260209T100049Z-20260209T110049Z
03:52:03 DEBUG [Worker 0] RTSP: Setting up UDP sockets
03:52:03 DEBUG [Worker 0] RTSP: RTP socket registered with epoll
03:52:03 DEBUG [Worker 0] RTSP: RTCP socket registered with epoll
03:52:03 DEBUG [Worker 0] RTSP: UDP sockets bound to ports 19736 (RTP) and 19737 (RTCP)
03:52:03 DEBUG [Worker 0] RTSP: Prepared request:
SETUP rtsp://124.75.28.73:55554/LIVE/1270332?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff&TRANSPORT=MP2T/TCP&DURATION=20260209T100049Z-20260209T110049Z&LID=1270332&Provider_id=SHDXFH_live&Pcontent_id=00000001000000050000000005000012&FvSeid=481aa2c27a137e53&FvTSDesb=1770634849-250011&TSDescribeResp=1770634849-262021 RTSP/1.0
CSeq: 7
User-Agent: rtp2httpd/3.8.3
Transport: MP2T/RTP/TCP;unicast;interleaved=0-1,MP2T/TCP;unicast;interleaved=0-1,RTP/AVP/TCP;unicast;interleaved=0-1,MP2T/RTP/UDP;unicast;client_port=19736-19737,MP2T/UDP;unicast;client_port=19736-19737,RTP/AVP;unicast;client_port=19736-19737

03:52:03 DEBUG [Worker 0] RTSP: Request sent completely (713 bytes)
03:52:03 DEBUG [Worker 0] RTSP: Request sent completely, waiting for response
03:52:03 DEBUG [Worker 0] RTSP: Parsing server transport response: MP2T/TCP;unicast;interleaved=0-1;ssrc=2293a4ee;mode="PLAY"
03:52:03 INFO [Worker 0] RTSP: Server selected MP2T transport
03:52:03 INFO [Worker 0] RTSP: Using TCP interleaved transport
03:52:03 DEBUG [Worker 0] RTSP: Server confirmed TCP interleaved channels: 0/1
03:52:03 DEBUG [Worker 0] RTSP: Closed UDP RTP socket (use TCP interleaved mode)
03:52:03 DEBUG [Worker 0] RTSP: Closed UDP RTCP socket (use TCP interleaved mode)
03:52:03 DEBUG [Worker 0] RTSP: Received complete header:
RTSP/1.0 200 OK
CSeq: 7
Server: FonsView SS/1.0
Date: Mon, 09 Feb 2026 11:00:49 GMT
Session: 580101358
Transport: MP2T/TCP;unicast;interleaved=0-1;ssrc=2293a4ee;mode="PLAY"

03:52:03 DEBUG [Worker 0] RTSP: Prepared request:
PLAY rtsp://124.75.28.73:55554/LIVE/1270332?AuthInfo=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&r2h-token=abcff&TRANSPORT=MP2T/TCP&DURATION=20260209T100049Z-20260209T110049Z&LID=1270332&Provider_id=SHDXFH_live&Pcontent_id=00000001000000050000000005000012&FvSeid=481aa2c27a137e53&FvTSDesb=1770634849-250011&TSDescribeResp=1770634849-262021 RTSP/1.0
CSeq: 8
User-Agent: rtp2httpd/3.8.3
Session: 580101358

03:52:03 DEBUG [Worker 0] RTSP: Request sent completely (488 bytes)
03:52:03 DEBUG [Worker 0] RTSP: Request sent completely, waiting for response
03:52:03 DEBUG [Worker 0] RTSP: Received complete header:
RTSP/1.0 200 OK
CSeq: 8
Server: FonsView SS/1.0
Date: Mon, 09 Feb 2026 11:00:49 GMT
Session: 580101358
Scale: 1.000000

03:52:03 INFO [Worker 0] RTSP: Stream started successfully
03:57:04 INFO [Worker 0] RTSP: Server closed connection
03:57:04 DEBUG [Worker 0] RTSP: Auto-cleanup triggered on ERROR state
03:57:04 DEBUG [Worker 0] RTSP: Main socket closed
03:57:04 DEBUG [Worker 0] RTSP: Session cleanup complete
03:57:04 ERROR [Worker 0] RTSP: Socket event handling failed

[bsdcpp]

一样的情况，“组播周期性重新加入间隔”改了没用，这个不是组播，是rtsp 的

[bsdcpp]

我用"酷9_v1.7.7.1-py_armeabi-v7a.apk"，可以回看，手机电视都不错，就是拖拽不太好用，还是需要hls 支持

[lucawong]

一样的情况，“组播周期性重新加入间隔”改了没用，这个不是组播，是rtsp 的

是的，设置这个没用。不知道后续版本会不会有改善

[bsdcpp]

坐等rtp2httpd v4 支持，目前"酷9_v1.7.7.1-py_armeabi-v7a.apk"这个版本可以回看，但是拖进度条不太灵

[phnxwang]

同样的问题，关键部分的log如下。试了酷9播放器和APTV，都是这样。

08:01:35 INFO [Worker 0] RTSP: Stream started successfully
08:06:36 INFO [Worker 0] RTSP: Server closed connection
08:06:36 DEBUG [Worker 0] RTSP: Auto-cleanup triggered on ERROR state
08:06:36 DEBUG [Worker 0] RTSP: Main socket closed
08:06:36 DEBUG [Worker 0] RTSP: Session cleanup complete
08:06:36 ERROR [Worker 0] RTSP: Socket event handling failed

[xianwengcao]

同样的问题

[sakuyamaij]

20:27:40 INFO [Worker 0] RTSP: Server closed connection
20:27:40 DEBUG [Worker 0] RTSP: Auto-cleanup triggered on ERROR state
20:27:40 DEBUG [Worker 0] RTSP: Main socket closed
20:27:40 DEBUG [Worker 0] RTSP: Session cleanup complete
20:27:40 ERROR [Worker 0] RTSP: Socket event handling failed

同样，回放看5分钟整，就又重新开始了

[stackia]

基本上确定是缺少 keep alive 机制问题，下个版本会尝试修复

[sakuyamaij]

10:32:53 DEBUG [Worker 0] RTSP: Prepared request:
GET_PARAMETER rtsp://124.75.28.15:55554/FSWTVOD/1202?AuthInfo=hide&playseek=20260215190000-20260215193900&clock=20260215T110000Z-20260215T113900Z&TRANSPORT=MP2T/UDP&DURATION=0-2340&Provider_id=SHDXFH_live&Pcontent_id=00000001000000050000000000111128&FvSeid=482c26dacfa1b209&FvTSDesb=1771208813-425229&TSDescribeResp=1771208813-431269 RTSP/1.0
CSeq: 20
User-Agent: rtp2httpd/3.8.3
Session: 490084449

10:32:53 DEBUG [Worker 0] RTSP: Queued GET_PARAMETER keepalive request
10:32:53 DEBUG [Worker 0] RTSP: Request sent completely (517 bytes)
10:32:53 DEBUG [Worker 0] RTSP: Request sent completely, waiting for response
10:32:53 DEBUG [Worker 0] RTSP: Received complete header:
RTSP/1.0 200 OK
CSeq: 20
Server: FonsView SS/1.0
Date: Mon, 16 Feb 2026 02:32:53 GMT
Session: 490084449

10:32:53 DEBUG [Worker 0] RTSP: GET_PARAMETER keepalive acknowledged
10:33:23 DEBUG [Worker 0] RTSP: Prepared request:
GET_PARAMETER rtsp://124.75.28.15:55554/FSWTVOD/1202?AuthInfo=hide&playseek=20260215190000-20260215193900&clock=20260215T110000Z-20260215T113900Z&TRANSPORT=MP2T/UDP&DURATION=0-2340&Provider_id=SHDXFH_live&Pcontent_id=00000001000000050000000000111128&FvSeid=482c26dacfa1b209&FvTSDesb=1771208813-425229&TSDescribeResp=1771208813-431269 RTSP/1.0
CSeq: 21
User-Agent: rtp2httpd/3.8.3
Session: 490084449

10:33:23 DEBUG [Worker 0] RTSP: Queued GET_PARAMETER keepalive request
10:33:23 DEBUG [Worker 0] RTSP: Request sent completely (517 bytes)
10:33:23 DEBUG [Worker 0] RTSP: Request sent completely, waiting for response
10:33:23 DEBUG [Worker 0] RTSP: Received complete header:
RTSP/1.0 200 OK
CSeq: 21
Server: FonsView SS/1.0
Date: Mon, 16 Feb 2026 02:33:23 GMT
Session: 490084449

10:33:23 DEBUG [Worker 0] RTSP: GET_PARAMETER keepalive acknowledged
10:33:53 DEBUG [Worker 0] RTSP: Prepared request:
GET_PARAMETER rtsp://124.75.28.15:55554/FSWTVOD/1202?AuthInfo=hide&playseek=20260215190000-20260215193900&clock=20260215T110000Z-20260215T113900Z&TRANSPORT=MP2T/UDP&DURATION=0-2340&Provider_id=SHDXFH_live&Pcontent_id=00000001000000050000000000111128&FvSeid=482c26dacfa1b209&FvTSDesb=1771208813-425229&TSDescribeResp=1771208813-431269 RTSP/1.0
CSeq: 22
User-Agent: rtp2httpd/3.8.3
Session: 490084449

10:33:53 DEBUG [Worker 0] RTSP: Queued GET_PARAMETER keepalive request
10:33:53 DEBUG [Worker 0] RTSP: Request sent completely (517 bytes)
10:33:53 DEBUG [Worker 0] RTSP: Request sent completely, waiting for response
10:33:53 DEBUG [Worker 0] RTSP: Received complete header:
RTSP/1.0 200 OK
CSeq: 22
Server: FonsView SS/1.0
Date: Mon, 16 Feb 2026 02:33:53 GMT
Session: 490084449

10:33:53 DEBUG [Worker 0] RTSP: GET_PARAMETER keepalive acknowledged

但很神奇的是也不是所有台都这样，我换了个台发现看回放就正常
每30秒就保活一次