I'm attempting to access and save the metadata stream from an IP camera.
So far I have managed to save the metadata with:
openRTSP -b 400000 -K -t rtsp://username:password@192.168.2.4:5554/live/ch1
This creates a metadata file application-VND.ONVIF.METADATA-2 (sample below) however this also streams the video file and saves it to: video-H264-1 in the current directory.
I would much prefer not to stream the video data as I have no use for it and bandwidth is an issue with multiple streams.
user@server:~# tail -n 1 application-VND.ONVIF.METADATA-2
<tt:MetadataStream xmlns:tt="http://www.onvif.org/ver10/schema" xmlns:wsnt="http://docs.oasis-open.org/wsn/b-2"><tt:VideoAnalytics><tt:Frame UtcTime="2022-04-02T06:55:13.577000"><tt:Transformation><tt:Translate x="-1.0" y="1.0"/><tt:Scale x="2.0" y="-2.0"/></tt:Transformation><tt:Object ObjectId="39242"><tt:Appearance><tt:Shape><tt:BoundingBox left="0.949999988079071" top="0.0" right="0.981249988079071" bottom="0.251800000667572"/><tt:CenterOfGravity x="0.965624988079071" y="0.125900000333786"/></tt:Shape><tt:Class><tt:ClassCandidate><tt:Type>Person</tt:Type><tt:Likelihood>0.47999998927116394</tt:Likelihood></tt:ClassCandidate></tt:Class></tt:Appearance></tt:Object></tt:Frame><tt:Frame UtcTime="2022-04-02T06:55:13.577000"><tt:Transformation><tt:Translate x="-1.0" y="1.0"/><tt:Scale x="2.0" y="-2.0"/></tt:Transformation><tt:Object ObjectId="39283"><tt:Appearance><tt:Shape><tt:BoundingBox left="0.21143999695777893" top="0.2988300025463104" right="0.33105000853538513" bottom="0.9925199747085571"/><tt:CenterOfGravity x="0.27124500274658203" y="0.6456749886274338"/></tt:Shape><tt:Class><tt:ClassCandidate><tt:Type>Person</tt:Type><tt:Likelihood>0.4699999988079071</tt:Likelihood></tt:ClassCandidate></tt:Class></tt:Appearance></tt:Object></tt:Frame><tt:Frame UtcTime="2022-04-02T06:55:13.577000"><tt:Transformation><tt:Translate x="-1.0" y="1.0"/><tt:Scale x="2.0" y="-2.0"/></tt:Transformation><tt:Object ObjectId="39287"><tt:Appearance><tt:Shape><tt:BoundingBox left="0.20412999391555786" top="0.28610000014305115" right="0.33774998784065247" bottom="0.6600499749183655"/><tt:CenterOfGravity x="0.27093999087810516" y="0.4730749875307083"/></tt:Shape><tt:Class><tt:ClassCandidate><tt:Type>Person</tt:Type><tt:Likelihood>0.23000000417232513</tt:Likelihood></tt:ClassCandidate></tt:Class></tt:Appearance></tt:Object></tt:Frame><tt:Frame UtcTime="2022-04-02T06:55:13.577000"><tt:Transformation><tt:Translate x="-1.0" y="1.0"/><tt:Scale x="2.0" y="-2.0"/></tt:Transformation><tt:Object ObjectId="39288"><tt:Appearance><tt:Shape><tt:BoundingBox left="0.6440899968147278" top="0.0" right="0.7041800022125244" bottom="0.19472000002861023"/><tt:CenterOfGravity x="0.6741349995136261" y="0.09736000001430511"/></tt:Shape><tt:Class><tt:ClassCandidate><tt:Type>Person</tt:Type><tt:Likelihood>0.18000000715255737</tt:Likelihood></tt:ClassCandidate></tt:Class></tt:Appearance></tt:Object></tt:Frame><tt:Frame UtcTime="2022-04-02T06:55:13.577000"><tt:Transformation><tt:Translate x="-1.0" y="1.0"/><tt:Scale x="2.0" y="-2.0"/></tt:Transformation><tt:Object ObjectId="39289"><tt:Appearance><tt:Shape><tt:BoundingBox left="0.29583001136779785" top="0.30309998989105225" right="0.4729200005531311" bottom="0.7376400232315063"/><tt:CenterOfGravity x="0.3843750059604645" y="0.5203700065612793"/></tt:Shape><tt:Class><tt:ClassCandidate><tt:Type>Person</tt:Type><tt:Likelihood>0.18000000715255737</tt:Likelihood></tt:ClassCandidate></tt:Class></tt:Appearance></tt:Object></tt:Frame></tt:VideoAnalytics></tt:MetadataStream>
user@server:~# openRTSP -b 400000 -K -t rtsp://username:password@192.168.2.4:5554/live/ch1
STDOUT:
Created new TCP socket 3 for connection
Connecting to 192.168.2.4, port 5554 on socket 3...
...remote connection opened
Sending request: OPTIONS rtsp://username:password@192.168.2.4:5554/live/ch1 RTSP/1.0
CSeq: 2
User-Agent: openRTSP (LIVE555 Streaming Media v2020.01.19)
Received 115 new bytes of response data.
Received a complete OPTIONS response:
RTSP/1.0 200 OK
CSeq: 2
Public: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, GET_PARAMETER, SET_PARAMETER
Sending request: DESCRIBE rtsp://username:password@192.168.2.4:5554/live/ch1 RTSP/1.0
CSeq: 3
User-Agent: openRTSP (LIVE555 Streaming Media v2020.01.19)
Accept: application/sdp
Received 156 new bytes of response data.
Received a complete DESCRIBE response:
RTSP/1.0 401 Unauthorized
CSeq: 3
WWW-Authenticate: Digest realm="ITX_VABOX", nonce="6247f394ff1fb1c1acaa90dcfec31e506cf149052cad069b41fb45a9b913e69a"
Resending...
Sending request: DESCRIBE rtsp://username:password@192.168.2.4:5554/live/ch1 RTSP/1.0
CSeq: 4
Authorization: Digest username="username", realm="ITX_VABOX", nonce="6247f394ff1fb1c1acaa90dcfec31e506cf149052cad069b41fb45a9b913e69a", uri="rtsp://username:password@192.168.2.4:5554/live/ch1", response="6b90e55e0af2db247e4ea2c674e58b38"
User-Agent: openRTSP (LIVE555 Streaming Media v2020.01.19)
Accept: application/sdp
Received 592 new bytes of response data.
Received a complete DESCRIBE response:
RTSP/1.0 200 OK
CSeq: 4
Content-Base: rtsp://username:password@192.168.2.4:5554/live/ch1
Content-Type: application/sdp
Content-Length: 447
v=0
o=- 1 1 IN IP4 192.168.2.4
s=Media Server
t=0 0
a=type:broadcast
c=IN IP4 0.0.0.0
m=video 0 RTP/AVP 96
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1;profile-level-id=64001F;sprop-parameter-sets=Z0IAKpY1QPAET8s3BQEFAg==,aM48gA==
a=control:rtsp://username:password@192.168.2.4:5554/live/ch1/video
m=application 0 RTP/AVP 97
a=rtpmap:97 VND.ONVIF.METADATA/8000
a=control:rtsp://username:password@192.168.2.4:5554/live/ch1/meta
Opened URL "rtsp://username:password@192.168.2.4:5554/live/ch1", returning a SDP description:
v=0
o=- 1 1 IN IP4 192.168.2.4
s=Media Server
t=0 0
a=type:broadcast
c=IN IP4 0.0.0.0
m=video 0 RTP/AVP 96
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1;profile-level-id=64001F;sprop-parameter-sets=Z0IAKpY1QPAET8s3BQEFAg==,aM48gA==
a=control:rtsp://username:password@192.168.2.4:5554/live/ch1/video
m=application 0 RTP/AVP 97
a=rtpmap:97 VND.ONVIF.METADATA/8000
a=control:rtsp://username:password@192.168.2.4:5554/live/ch1/meta
Created receiver for "video/H264" subsession (client ports 41390-41391)
Created receiver for "application/VND.ONVIF.METADATA" subsession (client ports 54122-54123)
Sending request: SETUP rtsp://username:password@192.168.2.4:5554/live/ch1/video RTSP/1.0
CSeq: 5
Authorization: Digest username="username", realm="ITX_VABOX", nonce="6247f394ff1fb1c1acaa90dcfec31e506cf149052cad069b41fb45a9b913e69a", uri="rtsp://username:password@192.168.2.4:5554/live/ch1", response="a7a7d51269283cd92b37e41dd8889109"
User-Agent: openRTSP (LIVE555 Streaming Media v2020.01.19)
Transport: RTP/AVP/TCP;unicast;interleaved=0-1
Received 128 new bytes of response data.
Received a complete SETUP response:
RTSP/1.0 200 OK
CSeq: 5
Transport: RTP/AVP/TCP;unicast;interleaved=0-1
Session: 05EB326D3901E880B71E1370F83E85;timeout=60
Setup "video/H264" subsession (client ports 41390-41391)
Sending request: SETUP rtsp://username:password@192.168.2.4:5554/live/ch1/meta RTSP/1.0
CSeq: 6
Authorization: Digest username="username", realm="ITX_VABOX", nonce="6247f394ff1fb1c1acaa90dcfec31e506cf149052cad069b41fb45a9b913e69a", uri="rtsp://username:password@192.168.2.4:5554/live/ch1", response="a7a7d51269283cd92b37e41dd8889109"
User-Agent: openRTSP (LIVE555 Streaming Media v2020.01.19)
Transport: RTP/AVP/TCP;unicast;interleaved=2-3
Session: 05EB326D3901E880B71E1370F83E85
Received a complete SETUP response:
RTSP/1.0 200 OK
CSeq: 6
Transport: RTP/AVP/TCP;unicast;interleaved=2-3
Session: 05EB326D3901E880B71E1370F83E85;timeout=60
Setup "application/VND.ONVIF.METADATA" subsession (client ports 54122-54123)
Created output file: "video-H264-1"
Created output file: "application-VND.ONVIF.METADATA-2"
Sending request: PLAY rtsp://username:password@192.168.2.4:5554/live/ch1 RTSP/1.0
CSeq: 7
Authorization: Digest username="username", realm="ITX_VABOX", nonce="6247f394ff1fb1c1acaa90dcfec31e506cf149052cad069b41fb45a9b913e69a", uri="rtsp://username:password@192.168.2.4:5554/live/ch1", response="b7bf5ee1ed4dab7afcb85bede5e7e785"
User-Agent: openRTSP (LIVE555 Streaming Media v2020.01.19)
Session: 05EB326D3901E880B71E1370F83E85
Range: npt=0.000-
Received a complete PLAY response:
RTSP/1.0 200 OK
CSeq: 7
Session: 05EB326D3901E880B71E1370F83E85
Range: clock=20220402T065513.225Z-
RTP-Info: url=rtsp://username:password@192.168.2.4:5554/live/ch1/video?;seq=29232;rtptime=2063989750,url=rtsp://username:password@192.168.2.4:5554/live/ch1/meta?;seq=29232;rtptime=2070061960
Started playing session
Receiving streamed data (signal with "kill -HUP 492099" or "kill -USR1 492099" to terminate)...
^C
user@server:~# gst-discoverer-1.0 -v -t 60 rtsp://username:password@192.168.2.4:5554/live/ch3
Done discovering rtsp://username:pass@192.168.2.4:5554/live/ch1
Analyzing URI timed out
Topology:
container: application/rtsp
unknown: application/x-rtp, media=(string)video, payload=(int)96, clock-rate=(int)90000, encoding-name=(string)H264, packetization-mode=(string)1, profile-level-id=(string)64001F, sprop-parameter-sets=(string)"Z0IAKpY1QPAET8s3BQEFAg\=\=\,aM48gA\=\=", a-type=(string)broadcast, npt-start=(guint64)23571980000000, play-speed=(double)1, play-scale=(double)1, ssrc=(uint)1304347240
video: video/x-h264, stream-format=(string)avc, alignment=(string)au, codec_data=(buffer)0142002affe100106742002a963540f0044fcb370501050201000468ce3c80, level=(string)4.2, profile=(string)baseline, width=(int)1920, height=(int)1080, framerate=(fraction)0/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true
Tags:
video codec: H.264 (Baseline Profile)
Codec:
video/x-h264, stream-format=(string)avc, alignment=(string)au, codec_data=(buffer)0142002affe100106742002a963540f0044fcb370501050201000468ce3c80, level=(string)4.2, profile=(string)baseline, width=(int)1920, height=(int)1080, framerate=(fraction)0/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true
Additional info:
None
Stream ID: b71011accfcd9e6ac1d42a60b4611071674cf9321b63a6b8cc4a6b480fca3e9f/0/video:0:0:RTP:AVP:96
Width: 1920
Height: 1080
Depth: 24
Frame rate: 0/1
Pixel aspect ratio: 1/1
Interlaced: false
Bitrate: 0
Max bitrate: 0
Properties:
Duration: 99:99:99.999999999
Seekable: no
Live: yes
Tags:
video codec: H.264 (Baseline Profile)
gst-launch-1.0 rtspsrc location=rtsp://username:password@192.168.2.4:5554/live/ch3 ! application/x-rtp, media=application ! fakesink dump=true >> cap.xml
This creates cap.xml file with somewhat encoded metadata. I believe this also streams the video data so that and the encoding is not ideal. It also tends to die periodically.
cap.xml sample
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Progress: (open) Opening Stream
Progress: (connect) Connecting to rtsp://username:password@192.168.2.4:5554/live/ch3
Progress: (open) Retrieving server options
Progress: (open) Retrieving media info
Progress: (request) SETUP stream 0
Progress: (request) SETUP stream 1
Progress: (open) Opened Stream
Setting pipeline to PLAYING ...
New clock: GstSystemClock
Progress: (request) Sending PLAY request
Progress: (request) Sending PLAY request
Progress: (request) Sent PLAY request
WARNING: from element /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0: Could not read from resource.
Additional debug info:
gstrtspsrc.c(5768): gst_rtspsrc_reconnect (): /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0:
Could not receive any UDP packets for 5.0000 seconds, maybe your firewall is blocking it. Retrying using a tcp connection.
00000000 (0x7f85bc009cf0): 80 e1 72 31 84 de b4 2e 5e 65 1d 2c 3c 74 74 3a ..r1....^e.,<tt:
00000010 (0x7f85bc009d00): 4d 65 74 61 64 61 74 61 53 74 72 65 61 6d 20 78 MetadataStream x
00000020 (0x7f85bc009d10): 6d 6c 6e 73 3a 74 74 3d 22 68 74 74 70 3a 2f 2f mlns:tt="http://
00000030 (0x7f85bc009d20): 77 77 77 2e 6f 6e 76 69 66 2e 6f 72 67 2f 76 65 www.onvif.org/ve
00000040 (0x7f85bc009d30): 72 31 30 2f 73 63 68 65 6d 61 22 20 78 6d 6c 6e r10/schema" xmln
00000050 (0x7f85bc009d40): 73 3a 77 73 6e 74 3d 22 68 74 74 70 3a 2f 2f 64 s:wsnt="http://d
00000060 (0x7f85bc009d50): 6f 63 73 2e 6f 61 73 69 73 2d 6f 70 65 6e 2e 6f ocs.oasis-open.o
00000070 (0x7f85bc009d60): 72 67 2f 77 73 6e 2f 62 2d 32 22 3e 3c 74 74 3a rg/wsn/b-2"><tt:
00000080 (0x7f85bc009d70): 56 69 64 65 6f 41 6e 61 6c 79 74 69 63 73 3e 3c VideoAnalytics><
00000090 (0x7f85bc009d80): 74 74 3a 46 72 61 6d 65 20 55 74 63 54 69 6d 65 tt:Frame UtcTime
000000a0 (0x7f85bc009d90): 3d 22 32 30 32 32 2d 30 34 2d 30 32 54 30 37 3a ="2022-04-02T07:
000000b0 (0x7f85bc009da0): 32 34 3a 34 31 2e 36 33 30 30 30 30 22 3e 3c 74 24:41.630000"><t
000000c0 (0x7f85bc009db0): 74 3a 54 72 61 6e 73 66 6f 72 6d 61 74 69 6f 6e t:Transformation
000000d0 (0x7f85bc009dc0): 3e 3c 74 74 3a 54 72 61 6e 73 6c 61 74 65 20 78 ><tt:Translate x
000000e0 (0x7f85bc009dd0): 3d 22 2d 31 2e 30 22 20 79 3d 22 31 2e 30 22 2f ="-1.0" y="1.0"/
000000f0 (0x7f85bc009de0): 3e 3c 74 74 3a 53 63 61 6c 65 20 78 3d 22 32 2e ><tt:Scale x="2.
00000100 (0x7f85bc009df0): 30 22 20 79 3d 22 2d 32 2e 30 22 2f 3e 3c 2f 74 0" y="-2.0"/></t
00000110 (0x7f85bc009e00): 74 3a 54 72 61 6e 73 66 6f 72 6d 61 74 69 6f 6e t:Transformation
00000120 (0x7f85bc009e10): 3e 3c 74 74 3a 4f 62 6a 65 63 74 20 4f 62 6a 65 ><tt:Object Obje
00000130 (0x7f85bc009e20): 63 74 49 64 3d 22 32 30 30 39 34 33 22 3e 3c 74 ctId="200943"><t
00000140 (0x7f85bc009e30): 74 3a 41 70 70 65 61 72 61 6e 63 65 3e 3c 74 74 t:Appearance><tt
00000150 (0x7f85bc009e40): 3a 53 68 61 70 65 3e 3c 74 74 3a 42 6f 75 6e 64 :Shape><tt:Bound
00000160 (0x7f85bc009e50): 69 6e 67 42 6f 78 20 6c 65 66 74 3d 22 30 2e 32 ingBox left="0.2
00000170 (0x7f85bc009e60): 39 33 30 34 39 39 39 31 31 33 30 38 32 38 38 36 9304999113082886
00000180 (0x7f85bc009e70): 22 20 74 6f 70 3d 22 30 2e 38 30 33 34 36 30 30 " top="0.8034600
00000190 (0x7f85bc009e80): 30 31 39 34 35 34 39 35 36 22 20 72 69 67 68 74 019454956" right
000001a0 (0x7f85bc009e90): 3d 22 30 2e 33 37 30 36 36 30 30 30 36 39 39 39 ="0.370660006999
000001b0 (0x7f85bc009ea0): 39 36 39 35 22 20 62 6f 74 74 6f 6d 3d 22 30 2e 9695" bottom="0.
000001c0 (0x7f85bc009eb0): 39 38 31 36 37 30 30 32 32 30 31 30 38 30 33 32 9816700220108032
000001d0 (0x7f85bc009ec0): 22 2f 3e 3c 74 74 3a 43 65 6e 74 65 72 4f 66 47 "/><tt:CenterOfG
000001e0 (0x7f85bc009ed0): 72 61 76 69 74 79 20 78 3d 22 30 2e 33 33 31 38 ravity x="0.3318
000001f0 (0x7f85bc009ee0): 35 34 39 39 39 30 36 35 33 39 39 31 37 22 20 79 5499906539917" y
00000200 (0x7f85bc009ef0): 3d 22 30 2e 38 39 32 35 36 35 30 31 31 39 37 38 ="0.892565011978
00000210 (0x7f85bc009f00): 31 34 39 34 22 2f 3e 3c 2f 74 74 3a 53 68 61 70 1494"/></tt:Shap
00000220 (0x7f85bc009f10): 65 3e 3c 74 74 3a 43 6c 61 73 73 3e 3c 74 74 3a e><tt:Class><tt:
00000230 (0x7f85bc009f20): 43 6c 61 73 73 43 61 6e 64 69 64 61 74 65 3e 3c ClassCandidate><
00000240 (0x7f85bc009f30): 74 74 3a 54 79 70 65 3e 50 65 72 73 6f 6e 3c 2f tt:Type>Person</
00000250 (0x7f85bc009f40): 74 74 3a 54 79 70 65 3e 3c 74 74 3a 4c 69 6b 65 tt:Type><tt:Like
00000260 (0x7f85bc009f50): 6c 69 68 6f 6f 64 3e 30 2e 31 37 30 30 30 30 30 lihood>0.1700000
00000270 (0x7f85bc009f60): 30 31 37 38 38 31 33 39 33 34 3c 2f 74 74 3a 4c 0178813934</tt:L
00000280 (0x7f85bc009f70): 69 6b 65 6c 69 68 6f 6f 64 3e 3c 2f 74 74 3a 43 ikelihood></tt:C
00000290 (0x7f85bc009f80): 6c 61 73 73 43 61 6e 64 69 64 61 74 65 3e 3c 2f lassCandidate></
000002a0 (0x7f85bc009f90): 74 74 3a 43 6c 61 73 73 3e 3c 2f 74 74 3a 41 70 tt:Class></tt:Ap
000002b0 (0x7f85bc009fa0): 70 65 61 72 61 6e 63 65 3e 3c 2f 74 74 3a 4f 62 pearance></tt:Ob
000002c0 (0x7f85bc009fb0): 6a 65 63 74 3e 3c 2f 74 74 3a 46 72 61 6d 65 3e ject></tt:Frame>
000002d0 (0x7f85bc009fc0): 3c 2f 74 74 3a 56 69 64 65 6f 41 6e 61 6c 79 74 </tt:VideoAnalyt
000002e0 (0x7f85bc009fd0): 69 63 73 3e 3c 2f 74 74 3a 4d 65 74 61 64 61 74 ics></tt:Metadat
000002f0 (0x7f85bc009fe0): 61 53 74 72 65 61 6d 3e 0d 0a 0d 0a 00 aStream>.....
00000000 (0x7f85d8077450): 80 e1 72 32 84 de b4 2e 5e 65 1d 2c 3c 74 74 3a ..r2....^e.,<tt:
From this link, as stated in the comments above:
You can add the
-Loption to youropenRTSPcommand line, and then redirect the output to a file, or pipe it to some other application to process the metadata.