pipeline with rtspclientsink does not stop when a rtsp TEARDOWN message is received

[roshninatarajan]

Hello, 

I have the following pipeline : 

autovideosrc ! video/x-raw ! queue ! x264enc key-int-max=30 bitrate=1048 !
video/x-h264,profile=baseline,width=1280,height=720,framerate=30/1 !
rtspclientsink location=server_url user=user user-pw=password protocols=tcp
async-handling=false 

I'm running this pipeline in a python script in 2 different ways :
 
1. Using Tornado's process.Subprocess module
 
 gst_cmd =
"gst-launch-1.0 autovideosrc ! queue ! x264enc key-int-max=30 bitrate=1048
!\
video/x-h264,profile=baseline,width=1280,height=720,framerate=30/1 !\
rtspclientsink user-id=user user-pw=password protocols=tcp
location=server_url async-handling=false"
gst_cmd = shlex.split(gst_cmd)
self.stream_proc = process.Subprocess(gst_cmd)

2. Using the python Gst library

pipeline = '''
autovideosrc ! video/x-raw ! queue ! x264enc key-int-max=30 bitrate=1048 !
video/x-h264,profile=baseline,width=1280,height=720,framerate=30/1 !
rtspclientsink name = rsink
'''
self.video_pipeline = Gst.parse_launch(pipeline)
rsink = self.video_pipeline.get_by_name('rsink')
rsink.set_property('location', gw_url)
rsink.set_property('user-id', 'user')
rsink.set_property('user-pw', source_token)
rsink.set_property('async-handling', False)
rsink.set_property('protocols', 'tcp')

if self.video_pipeline and self.video_pipeline.get_state(0).state ==
Gst.State.NULL:
    self.video_pipeline.set_state(Gst.State.PLAYING)

when I set the pipeline state to PLAYING, video is sent to the server and
I'm able to view the streamed video from webcam in both these cases.
However, when the server sends a rtsp TEARDOWN message, the pipeline state
DOES NOT change to NULL in Case-2 (which uses python Gst library). Instead
there is a continuous stream of warnings in the debug logs until I kill the
script manually.  Debug logs for both cases are attached at the end. 

Any explanation on why there is a difference between using gst-launch-1.0
and Python Gst library would be highly appreciated. 

Cheers, 
Roshni 


==================================================== 
Case - 1 : debug logs when using Tornado's process.Subprocess with
gst-launch-1.0
==================================================== 

0:00:07.231205000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1945:gst_rtsp_client_sink_loop_rx:<rtspclientsink0> we
received a server message 
0:00:07.231231000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1819:gst_rtsp_client_sink_handle_request:<rtspclientsink0> got
server request message 
0:00:07.231242000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1825:gst_rtsp_client_sink_handle_request:<rtspclientsink0> prepare
OK reply 
0:00:07.231520000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1932:gst_rtsp_client_sink_loop_rx:<rtspclientsink0> doing
receive with timeout 8634 seconds 
0:00:07.240831000 42850 0x7fadc18088a0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspclientsink0> sending
message 
0:00:07.240949000 42850 0x7fadc18088a0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspclientsink0> sending
message 
0:00:07.253519000 42850 0x7fadc1808940 WARN          rtspclientsink
gstrtspclientsink.c:1976:gst_rtsp_client_sink_loop_rx:<rtspclientsink0> warning:
Unhandled return value -7. 
0:00:07.253628000 42850 0x7fadc1808940 WARN          rtspclientsink
gstrtspclientsink.c:2049:gst_rtsp_client_sink_loop_rx:<rtspclientsink0> error:
Could not receive message. (System error) 
0:00:07.253664000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:2312:gst_rtsp_client_sink_loop:<rtspclientsink0> pausing
task, reason error 
0:00:07.253676000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:2253:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> sending
cmd WAIT 
0:00:07.253684000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:2265:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> cancel
previous request LOOP
WARNING: from element
/GstPipeline:pipeline0/GstRTSPClientSink:rtspclientsink0: Could not read
from resource. 
0:00:07.253691000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:2273:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> connection
flush busy LOOP 
Additional debug info: 
gstrtspclientsink.c(1976): gst_rtsp_client_sink_loop_rx ():
/GstPipeline:pipeline0/GstRTSPClientSink:rtspclientsink0: 
Unhandled return value -7. 
0:00:07.253700000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1774:gst_rtsp_client_sink_connection_flush:<rtspclientsink0> set
flushing 1 
0:00:07.253710000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1777:gst_rtsp_client_sink_connection_flush:<rtspclientsink0> connection
flush 
ERROR: from element
/GstPipeline:pipeline0/GstRTSPClientSink:rtspclientsink0: Could not read
from resource. 
Additional debug info: 
gstrtspclientsink.c(2049): gst_rtsp_client_sink_loop_rx ():
/GstPipeline:pipeline0/GstRTSPClientSink:rtspclientsink0: 
Could not receive message. (System error) 
Execution ended after 0:00:07.001021000 
Setting pipeline to PAUSED ... 
0:00:07.253794000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:2253:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> sending
cmd WAIT 
0:00:07.253803000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:2278:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> not
interrupting busy cmd WAIT 
0:00:07.253825000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:4354:gst_rtsp_client_sink_thread:<rtspclientsink0> got
command WAIT 
0:00:07.253903000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1774:gst_rtsp_client_sink_connection_flush:<rtspclientsink0> set
flushing 0 
0:00:07.253909000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1777:gst_rtsp_client_sink_connection_flush:<rtspclientsink0> connection
flush 
0:00:07.253954000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:2253:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> sending
cmd PAUSE 
0:00:07.253999000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:2278:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> not
interrupting busy cmd WAIT 
0:00:07.254019000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:4354:gst_rtsp_client_sink_thread:<rtspclientsink0> got
command PAUSE 
0:00:07.254032000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1774:gst_rtsp_client_sink_connection_flush:<rtspclientsink0> set
flushing 0 
0:00:07.254040000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:4108:gst_rtsp_client_sink_pause:<rtspclientsink0> PAUSE... 
0:00:07.254046000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:4188:gst_rtsp_client_sink_pause:<rtspclientsink0> PAUSE
is not supported 
0:00:07.254060000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:4354:gst_rtsp_client_sink_thread:<rtspclientsink0> got
command LOOP 
0:00:07.254068000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1774:gst_rtsp_client_sink_connection_flush:<rtspclientsink0> set
flushing 0 
0:00:07.254076000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1932:gst_rtsp_client_sink_loop_rx:<rtspclientsink0> doing
receive with timeout 8634 seconds 
Setting pipeline to READY ... 
0:00:07.254112000 42850 0x7fadc1808940 WARN          rtspclientsink
gstrtspclientsink.c:1976:gst_rtsp_client_sink_loop_rx:<rtspclientsink0> warning:
Unhandled return value -7. 
0:00:07.254128000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:2656:gst_rtsp_client_sink_set_state:<rtspclientsink0> Setting
internal state to READY 
0:00:07.254148000 42850 0x7fadc1808940 WARN          rtspclientsink
gstrtspclientsink.c:2049:gst_rtsp_client_sink_loop_rx:<rtspclientsink0> error:
Could not receive message. (System error) 
0:00:07.254180000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:2312:gst_rtsp_client_sink_loop:<rtspclientsink0> pausing
task, reason error 
0:00:07.254193000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:2253:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> sending
cmd WAIT 
0:00:07.254203000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:2265:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> cancel
previous request LOOP
0:00:07.254215000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:2273:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> connection
flush busy LOOP 
0:00:07.254226000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1774:gst_rtsp_client_sink_connection_flush:<rtspclientsink0> set
flushing 1 
0:00:07.254237000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1777:gst_rtsp_client_sink_connection_flush:<rtspclientsink0> connection
flush 
0:00:07.254410000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:4329:gst_rtsp_client_sink_handle_message:<rtspclientsink0> Internal
bin changed state to PAUSED (pending READY). Prerolled now 0 
0:00:07.254873000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:4329:gst_rtsp_client_sink_handle_message:<rtspclientsink0> Internal
bin changed state to READY (pending VOID_PENDING). Prerolled now 0 
0:00:07.254913000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:2253:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> sending
cmd CLOSE 
0:00:07.254922000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:2278:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> not
interrupting busy cmd WAIT 
0:00:07.254941000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:4354:gst_rtsp_client_sink_thread:<rtspclientsink0> got
command CLOSE 
0:00:07.254955000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1774:gst_rtsp_client_sink_connection_flush:<rtspclientsink0> set
flushing 0 
0:00:07.254963000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1777:gst_rtsp_client_sink_connection_flush:<rtspclientsink0> connection
flush 
0:00:07.254977000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:3023:gst_rtsp_client_sink_close:<rtspclientsink0> TEARDOWN... 
0:00:07.254988000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:2656:gst_rtsp_client_sink_set_state:<rtspclientsink0> Setting
internal state to NULL 
0:00:07.255188000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:4329:gst_rtsp_client_sink_handle_message:<rtspclientsink0> Internal
bin changed state to NULL (pending VOID_PENDING). Prerolled now 0 
0:00:07.265378000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:3061:gst_rtsp_client_sink_close:<rtspclientsink0> Looking
at stream 0x7fadc2025740 for teardown 
0:00:07.265402000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:3084:gst_rtsp_client_sink_close:<rtspclientsink0> Sending
teardown for stream 0x7fadc2025740 at URL
rtsp://roshni-cloudbox.st-av.com:8556/eEvm18CWLmczsunkAHr0S 
0:00:07.265424000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspclientsink0> sending
message 
0:00:07.265473000 42850 0x7fadc1808940 WARN          rtspclientsink
gstrtspclientsink.c:2599:gst_rtsp_client_sink_try_send:<rtspclientsink0> error:
Could not send message. (System error) 
0:00:07.265500000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:2735:gst_rtsp_client_sink_send:<rtspclientsink0> got
error -7 
0:00:07.265514000 42850 0x7fadc1808940 WARN          rtspclientsink
gstrtspclientsink.c:3145:gst_rtsp_client_sink_close:<rtspclientsink0> error:
Could not send message. (System error) 
0:00:07.265534000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:3111:gst_rtsp_client_sink_close:<rtspclientsink0> closing
connection... 
0:00:07.265542000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1742:gst_rtsp_conninfo_close:<rtspclientsink0> closing
connection... 
0:00:07.265872000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1748:gst_rtsp_conninfo_close:<rtspclientsink0> freeing
connection... 
0:00:07.265893000 42850 0x7fadc1808940 DEBUG         rtspclientsink
gstrtspclientsink.c:1551:gst_rtsp_client_sink_cleanup:<rtspclientsink0> cleanup 
Setting pipeline to NULL ... 
0:00:08.216385000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:4437:gst_rtsp_client_sink_stop:<rtspclientsink0> stopping 
0:00:08.216395000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:2253:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> sending
cmd WAIT 
0:00:08.216401000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:2273:gst_rtsp_client_sink_loop_send_cmd:<rtspclientsink0> connection
flush busy WAIT 
0:00:08.216407000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:1774:gst_rtsp_client_sink_connection_flush:<rtspclientsink0> set
flushing 1 
0:00:08.216434000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:3023:gst_rtsp_client_sink_close:<rtspclientsink0> TEARDOWN... 
0:00:08.216440000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:2656:gst_rtsp_client_sink_set_state:<rtspclientsink0> Setting
internal state to NULL 
0:00:08.216453000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:3028:gst_rtsp_client_sink_close:<rtspclientsink0> not
ready, doing cleanup 
0:00:08.216457000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:3111:gst_rtsp_client_sink_close:<rtspclientsink0> closing
connection... 
0:00:08.216461000 42850 0x7fadc0e8eaa0 DEBUG         rtspclientsink
gstrtspclientsink.c:1551:gst_rtsp_client_sink_cleanup:<rtspclientsink0> cleanup

================================= 
Case - 2 : debug logs when using Python Gst Library
================================= 

0:00:12.150424000 50236 0x7ff37080ba80 DEBUG         rtspclientsink
gstrtspclientsink.c:1945:gst_rtsp_client_sink_loop_rx:<rtspsink> we received
a server message 
0:00:12.150444000 50236 0x7ff37080ba80 DEBUG         rtspclientsink
gstrtspclientsink.c:1819:gst_rtsp_client_sink_handle_request:<rtspsink> got
server request message 
0:00:12.150451000 50236 0x7ff37080ba80 DEBUG         rtspclientsink
gstrtspclientsink.c:1825:gst_rtsp_client_sink_handle_request:<rtspsink> prepare
OK reply 
0:00:12.150501000 50236 0x7ff37080ba80 DEBUG         rtspclientsink
gstrtspclientsink.c:1932:gst_rtsp_client_sink_loop_rx:<rtspsink> doing
receive with timeout 8634 seconds 
0:00:12.168209000 50236 0x7ff370817cf0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspsink> sending
message 
0:00:12.168314000 50236 0x7ff370817cf0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspsink> sending
message 
0:00:12.168399000 50236 0x7ff370817cf0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspsink> sending
message 
0:00:12.182392000 50236 0x7ff37080ba80 WARN          rtspclientsink
gstrtspclientsink.c:1976:gst_rtsp_client_sink_loop_rx:<rtspsink> warning:
Unhandled return value -7. 
0:00:12.182455000 50236 0x7ff37080ba80 WARN          rtspclientsink
gstrtspclientsink.c:2049:gst_rtsp_client_sink_loop_rx:<rtspsink> error:
Could not receive message. (System error) 
0:00:12.182480000 50236 0x7ff37080ba80 DEBUG         rtspclientsink
gstrtspclientsink.c:2312:gst_rtsp_client_sink_loop:<rtspsink> pausing task,
reason error 
0:00:12.182488000 50236 0x7ff37080ba80 DEBUG         rtspclientsink
gstrtspclientsink.c:2253:gst_rtsp_client_sink_loop_send_cmd:<rtspsink> sending
cmd WAIT 
0:00:12.182496000 50236 0x7ff37080ba80 DEBUG         rtspclientsink
gstrtspclientsink.c:2265:gst_rtsp_client_sink_loop_send_cmd:<rtspsink> cancel
previous request LOOP 
0:00:12.182503000 50236 0x7ff37080ba80 DEBUG         rtspclientsink
gstrtspclientsink.c:2273:gst_rtsp_client_sink_loop_send_cmd:<rtspsink> connection
flush busy LOOP 
0:00:12.182509000 50236 0x7ff37080ba80 DEBUG         rtspclientsink
gstrtspclientsink.c:1774:gst_rtsp_client_sink_connection_flush:<rtspsink> set
flushing 1 
0:00:12.182547000 50236 0x7ff37080ba80 DEBUG         rtspclientsink
gstrtspclientsink.c:1777:gst_rtsp_client_sink_connection_flush:<rtspsink> connection
flush 
0:00:12.199414000 50236 0x7ff370817cf0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspsink> sending
message 
0:00:12.199482000 50236 0x7ff370817cf0 WARN          rtspclientsink
gstrtspclientsink.c:2601:gst_rtsp_client_sink_try_send:<rtspsink> send
interrupted 
0:00:12.199547000 50236 0x7ff370817cf0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspsink> sending
message 
0:00:12.199577000 50236 0x7ff370817cf0 WARN          rtspclientsink
gstrtspclientsink.c:2601:gst_rtsp_client_sink_try_send:<rtspsink> send
interrupted 
0:00:12.199592000 50236 0x7ff370817cf0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspsink> sending
message 
0:00:12.199608000 50236 0x7ff370817cf0 WARN          rtspclientsink
gstrtspclientsink.c:2601:gst_rtsp_client_sink_try_send:<rtspsink> send
interrupted 
0:00:12.244805000 50236 0x7ff370817cf0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspsink> sending
message 
0:00:12.244899000 50236 0x7ff370817cf0 WARN          rtspclientsink
gstrtspclientsink.c:2601:gst_rtsp_client_sink_try_send:<rtspsink> send
interrupted 
0:00:12.244968000 50236 0x7ff370817cf0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspsink> sending
message 
0:00:12.244997000 50236 0x7ff370817cf0 WARN          rtspclientsink
gstrtspclientsink.c:2601:gst_rtsp_client_sink_try_send:<rtspsink> send
interrupted 
0:00:12.278644000 50236 0x7ff370817cf0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspsink> sending
message 
0:00:12.278710000 50236 0x7ff370817cf0 WARN          rtspclientsink
gstrtspclientsink.c:2601:gst_rtsp_client_sink_try_send:<rtspsink> send
interrupted 
0:00:12.278826000 50236 0x7ff370817cf0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspsink> sending
message 
0:00:12.278863000 50236 0x7ff370817cf0 WARN          rtspclientsink
gstrtspclientsink.c:2601:gst_rtsp_client_sink_try_send:<rtspsink> send
interrupted 
0:00:12.278877000 50236 0x7ff370817cf0 DEBUG         rtspclientsink
gstrtspclientsink.c:2509:gst_rtsp_client_sink_try_send:<rtspsink> sending
message 
0:00:12.278893000 50236 0x7ff370817cf0 WARN          rtspclientsink
gstrtspclientsink.c:2601:gst_rtsp_client_sink_try_send:<rtspsink> send
interrupted 






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