please help to setup RS r200 in ubuntu 18.04

[FPSychotic]

HI , followed all possible configurations that I could imagin to make work Realsense r200 in ubuntu 18.04 and GPU Intel i960 driver i Think
the camera start, as the IR emiter is turn on, the streamings are made but imposible get image in my IP or 127.0.0.1
for ubuntu when I made the dcm should I config for Aero, Aero+realsense or only realsense. should I start the server for xml and aiim the uri to rs-rgb, or uvc?
is mandatory have working the mavlink link?
i get image from a webcam with no problem but I cant with r200, maybe the gstreamer config is bad for 18.04?

[MatejFranceskin]

I don't have the hardware to try it but maybe I can help you. First start dcm and post the output so that we can see how the camera was detected.

[FPSychotic]

I have ubuntu 18.04, realsense r200, usb camera uvc,and gazebo.
I make this steps and I get this outs
$cd /home/ihexa/camera-manager/samples/def
Serving HTTP on 0.0.0.0 port 8000 ...

$./autogen.sh && ./configure --enable-mavlink --enable-realsense --enable-avahi --enable-gazebo
...
RealSense support: yes
MAVLink support: yes
AVAHI support: yes
Intel Aero support: no
Gazebo support: yes
Custom support: no

$make
...
CXX src/main.o
CXXLD dcm
GEN dronecode-camera-manager.service

I run mavros via UART ttys04 921600bds (connect to FCU chibiOS via TL2 port) and it serve with its proxy url_gcs (in launch file)in port 14450 to mavlink-router which will distribute to internal gcs in companin gcs port 14551, gcs in netbook port 14552. The conexion is all by an access point made with my phone (192.168.43.1),but with home router I get same results.
MAVROS LAUNCH




MAVROS OUT
...
[ INFO] [1553952945.742400657]: FCU URL: /dev/ttyS4:921600
[ INFO] [1553952945.749554984]: serial0: device: /dev/ttyS4 @ 921600 bps
[ INFO] [1553952945.761497870]: GCS URL: udp://@127.0.0.1:14550
[ INFO] [1553952945.761992498]: udp1: Bind address: 0.0.0.0:14555
[ INFO] [1553952945.762191889]: udp1: Remote address: 127.0.0.1:14550
...
WARN] [1553952946.853787048]: IMU: linear acceleration on RAW_IMU known on APM only.
[ WARN] [1553952946.853911680]: IMU: ~imu/data_raw stores unscaled raw acceleration report.
[ WARN] [1553952946.855662164]: GP: No GPS fix
[ INFO] [1553952947.214916150]: CON: Got HEARTBEAT, connected. FCU: ArduPilot
[ INFO] [1553952947.342551352]: RC_CHANNELS message detected!
[ INFO] [1553952948.231186996]: VER: 1.1: Capabilities 0x00000000000031cf
[ INFO] [1553952948.231300266]: VER: 1.1: Flight software: 03050000 ( b450355)
[ INFO] [1553952948.231364088]: VER: 1.1: Middleware software: 00000000 ( )
[ INFO] [1553952948.231433222]: VER: 1.1: OS software: 00000000 ( 1052fcc)
[ INFO] [1553952948.231499094]: VER: 1.1: Board hardware: 00000000
[ INFO] [1553952948.231558366]: VER: 1.1: VID/PID: 0000:0000
[ INFO] [1553952948.231622264]: VER: 1.1: UID: 0000000000000000
[ WARN] [1553952948.231763320]: CMD: Unexpected command 520, result 0
[ INFO] [1553952957.215623927]: HP: requesting home position
[ INFO] [1553952957.219801564]: FCU: ArduRover V3.5.0-dev (b450355f)
[ INFO] [1553952957.221730789]: FCU: ChibiOS: 1052fcc7
[ INFO] [1553952957.224452978]: FCU: mini-pix 0055003C 3136510E 34373935
[ INFO] [1553952962.218387252]: WP: mission received
[ INFO] [1553952967.216354178]: HP: requesting home position

i START MAVLIN-ROUTER
$ mavlink-routerd -e 192.168.43.156:14552 -e 127.0.0.1:14553 -e 127.0.0.1:14551 127.0.0.1:14550
Open UDP [4] 127.0.0.1:14550 *
Open UDP [5] 127.0.0.1:14551
Open UDP [6] 127.0.0.1:14553
Open UDP [7] 192.168.43.156:14552
Open TCP [8] 0.0.0.0:5760 *

DCM main.cfg as I want realsense r200 rgb camera streaming so I use the aero.cfg file which I adapt to my ls /dev/video output, my companion IP and port that is serve by mavlink-router 14553*

MAIN.cfg in /etc/dcm
[gstreamer]
muxer=rtph264pay
encoder=vaapih264enc
converter=autovideoconvert

[v4l2]
blacklist=video2,video1,video3,video4,video5,video6,video7,video8,video9,video10,video11,video12

[mavlink]
broadcast_addr=127.0.0.1
port=14553
rtsp_server_addr=192.168.43.153

[uri]
video0=http://192.168.43.153:8000/camera-def-rs-rgb.xml

I run dcm copied in /usr/bin
$ dcm
An instance of Gazebo is not running.
ConfFile: Adding section 'gstreamer'
ConfFile: Adding section 'v4l2'
ConfFile: Adding section 'mavlink'
ConfFile: Adding section 'uri'
Use System ID 1, till heartbeat received from Vehicle
Section 'imgcap' not found and field 'width' is required.
Section 'imgcap' not found and field 'location' is required.
Image Capture location not found, use default
Section 'vidcap' not found and field 'width' is required.
Section 'vidcap' not found and field 'location' is required.
Video Capture location not found, use default
Camera Device : rsdepth
CameraDeviceRealSense path:rsdepth
Required field 'rsdepth' not found in section 'uri', defined in:
/etc/dcm/main.conf
Section 'rtsp' not found and field 'pipeline' is required.
addCameraComponent
Camera Device : rsir
CameraDeviceRealSense path:rsir
Required field 'rsir' not found in section 'uri', defined in:
/etc/dcm/main.conf
Section 'rtsp' not found and field 'pipeline' is required.
addCameraComponent
Camera Device : rsir2
CameraDeviceRealSense path:rsir2
Required field 'rsir2' not found in section 'uri', defined in:
/etc/dcm/main.conf
Section 'rtsp' not found and field 'pipeline' is required.
addCameraComponent
Camera Device : video0
CameraDeviceV4l2 Node: video0
Driver name : uvcvideo
Card type : Intel RealSense 3D Camera R200:
Bus info : usb-0000:00:14.0-1
Driver version: 4.15.18
Capabilities : 0x84200001
Device Caps : 0x04200001
card = Intel RealSense 3D Camera R200: driver = uvcvideo
Kernel version = 266002
Section 'rtsp' not found and field 'pipeline' is required.
addCameraComponent
Camera Device : video1
Device is black listed : video1
Camera Device : video2
Device is black listed : video2
Camera Device : video3
Device is black listed : video3
CAMERA SERVER START
VideoStreamRtsp Device:rsdepth
P15VideoStreamRtsp::start
P15VideoStreamRtsp::startRtspServer
createRtspServer
RTSP stream ready at rtsp://:8554/rsdepth
attachRtspServer
VideoStreamRtsp Device:rsir
P15VideoStreamRtsp::start
P15VideoStreamRtsp::startRtspServer
RTSP stream ready at rtsp://:8554/rsir
VideoStreamRtsp Device:rsir2
P15VideoStreamRtsp::start
P15VideoStreamRtsp::startRtspServer
RTSP stream ready at rtsp://:8554/rsir2
VideoStreamRtsp Device:video0
P15VideoStreamRtsp::start
P15VideoStreamRtsp::startRtspServer
RTSP stream ready at rtsp://:8554/video0
MAVLINK START
Bind UDP [12] 0.0.0.0:34550
Open UDP [12]
Adding fd: 12 glib_flags: 1
AVAHI START
Starting Dronecode Camera Manager
UDP: [12] wrote 21 bytes
UDP: [12] wrote 21 bytes
UDP: [12] wrote 21 bytes
...
I put this url in vln, qgc, etc and no video
rtsp://127.0.0.1:8554/video0
Im going to try use the ubuntu.conf to make work the realsense r200, as with its own .cfg I get error missing pipeline and so.
My internal gcs use ID 255, I dont know for what is it, I will put 128 to avoid some conflict, and the port I dont know what port I need to use if the GCS a free port listening..I will put the only free from mavlink-router.
So this is the .cfg for realsense using ubuntu uvc sample
[mavlink]
port=14553
broadcast_addr=127.0.0.255
rtsp_server_addr=192.168.43.153
system_id=128

[uri]
video0=http://192.168.43.153:8000/camera-def-uvc.xml (i tried too with -rs-rgb)

[imgcap]
width=640
height=480
format=2
location=/tmp/

[vidcap]
width=640
height=480
framerate=30
bitrate=1000
encoder=3
format=1
location=/tmp/

[rtsp]
pipeline=v4l2src device=/dev/video0 ! videoconvert ! video/x-raw, format=I420 ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0

OUTPUT DCM
$ dcm -v
An instance of Gazebo is not running.
ConfFile: Adding section 'mavlink'
ConfFile: Adding section 'uri'
ConfFile: Adding section 'imgcap'
ConfFile: Adding section 'vidcap'
ConfFile: Adding section 'rtsp'
Use System ID 128, ignore heartbeat from Vehicle
Image Capture Width=640 Height=480 format=2
Image Capture location : /tmp/
Video Capture Width=640 Height=480 framerate=30, bitrate=1000kbps, encoder=3, format=1
Video Capture location : /tmp/
Camera Device : rsdepth
CameraDeviceRealSense path:rsdepth
Required field 'rsdepth' not found in section 'uri', defined in:
/etc/dcm/main.conf
addCameraComponent
Camera Device : rsir
CameraDeviceRealSense path:rsir
Required field 'rsir' not found in section 'uri', defined in:
/etc/dcm/main.conf
addCameraComponent
Camera Device : rsir2
CameraDeviceRealSense path:rsir2
Required field 'rsir2' not found in section 'uri', defined in:
/etc/dcm/main.conf
addCameraComponent
Camera Device : video0
CameraDeviceV4l2 Node: video0
Driver name : uvcvideo
Card type : Intel RealSense 3D Camera R200:
Bus info : usb-0000:00:14.0-1
Driver version: 4.15.18
Capabilities : 0x84200001
Device Caps : 0x04200001
card = Intel RealSense 3D Camera R200: driver = uvcvideo
Kernel version = 266002
addCameraComponent
Camera Device : video1
CameraDeviceV4l2 Node: video1
Driver name : uvcvideo
Card type : Intel RealSense 3D Camera R200:
Bus info : usb-0000:00:14.0-1
Driver version: 4.15.18
Capabilities : 0x84200001
Device Caps : 0x04200001
card = Intel RealSense 3D Camera R200: driver = uvcvideo
Kernel version = 266002
Required field 'video1' not found in section 'uri', defined in:
/etc/dcm/main.conf
addCameraComponent
Camera Device : video2
CameraDeviceV4l2 Node: video2
Driver name : uvcvideo
Card type : Intel RealSense 3D Camera R200:
Bus info : usb-0000:00:14.0-1
Driver version: 4.15.18
Capabilities : 0x84200001
Device Caps : 0x04200001
card = Intel RealSense 3D Camera R200: driver = uvcvideo
Kernel version = 266002
Required field 'video2' not found in section 'uri', defined in:
/etc/dcm/main.conf
addCameraComponent
Error in adding Camera Component
Camera Device : video3
CameraDeviceV4l2 Node: video3
Driver name : uvcvideo
Card type : Microsoft® LifeCam HD-6000 for
Bus info : usb-0000:00:14.0-7.1
Driver version: 4.15.18
Capabilities : 0x84200001
Device Caps : 0x04200001
card = Microsoft® LifeCam HD-6000 for driver = uvcvideo
Kernel version = 266002
Required field 'video3' not found in section 'uri', defined in:
/etc/dcm/main.conf
addCameraComponent
Error in adding Camera Component
CAMERA SERVER START
VideoStreamRtsp Device:rsdepth
P15VideoStreamRtsp::start
P15VideoStreamRtsp::startRtspServer
createRtspServer
RTSP stream ready at rtsp://:8554/rsdepth
attachRtspServer
VideoStreamRtsp Device:rsir
P15VideoStreamRtsp::start
P15VideoStreamRtsp::startRtspServer
RTSP stream ready at rtsp://:8554/rsir
VideoStreamRtsp Device:rsir2
P15VideoStreamRtsp::start
P15VideoStreamRtsp::startRtspServer
RTSP stream ready at rtsp://:8554/rsir2
VideoStreamRtsp Device:video0
P15VideoStreamRtsp::start
P15VideoStreamRtsp::startRtspServer
RTSP stream ready at rtsp://:8554/video0
VideoStreamRtsp Device:video1
P15VideoStreamRtsp::start
P15VideoStreamRtsp::startRtspServer
RTSP stream ready at rtsp://:8554/video1
Add Param:Brightness Type:1 Value:56
Add Param:Contrast Type:1 Value:32
Add Param:Saturation Type:1 Value:128
Add Param:Hue Type:1 Value:0
Add Param:White Balance Temperature, Auto Type:2 Value:1
Add Param:Gamma Type:1 Value:220
Add Param:Gain Type:1 Value:32
Add Param:Power Line Frequency Type:3 Value:0
Add Param:White Balance Temperature Type:1 Value:6500
Add Param:Sharpness Type:1 Value:0
Add Param:Backlight Compensation Type:1 Value:1
Add Param:Exposure, Auto Type:3 Value:3
Add Param:Exposure (Absolute) Type:1 Value:1
VideoStreamRtsp Device:video2
P15VideoStreamRtsp::start
P15VideoStreamRtsp::startRtspServer
RTSP stream ready at rtsp://:8554/video2
Add Param:Brightness Type:1 Value:133
Add Param:Contrast Type:1 Value:2
Add Param:Saturation Type:1 Value:83
Add Param:White Balance Temperature, Auto Type:2 Value:1
Add Param:Power Line Frequency Type:3 Value:2
Add Param:White Balance Temperature Type:1 Value:3541
Add Param:Sharpness Type:1 Value:20
Add Param:Backlight Compensation Type:1 Value:0
Add Param:Exposure, Auto Type:3 Value:3
Add Param:Exposure (Absolute) Type:1 Value:156
Add Param:Pan (Absolute) Type:1 Value:0
Unknown V4L2 Control Parameter
Unknown V4L2 Control Parameter
Invalid Argument
Unknown V4L2 Control Parameter
Add Param:Tilt (Absolute) Type:1 Value:0
Unknown V4L2 Control Parameter
Unknown V4L2 Control Parameter
Invalid Argument
Unknown V4L2 Control Parameter
Add Param:Focus (absolute) Type:1 Value:0
Unknown V4L2 Control Parameter
Unknown V4L2 Control Parameter
Invalid Argument
Unknown V4L2 Control Parameter
Add Param:Focus, Auto Type:2 Value:1
Unknown V4L2 Control Parameter
Unknown V4L2 Control Parameter
Invalid Argument
Unknown V4L2 Control Parameter
Add Param:Zoom, Absolute Type:1 Value:0
Unknown V4L2 Control Parameter
Unknown V4L2 Control Parameter
Invalid Argument
Unknown V4L2 Control Parameter
VideoStreamRtsp Device:video3
P15VideoStreamRtsp::start
P15VideoStreamRtsp::startRtspServer
RTSP stream ready at rtsp://:8554/video3
MAVLINK START
Bind UDP [12] 0.0.0.0:34550
Open UDP [12]
Adding fd: 12 glib_flags: 1
AVAHI START
Starting Dronecode Camera Manager
UDP: [12] wrote 21 bytes
UDP: [12] wrote 21 bytes
UDP: [12] wrote 21 bytes
.....
=pay0
cb_media_configure
cb_unprepared
cb_create_element
host:127.0.0.1,port:8554,abspath:/video0,query:(null)
GST Pipeline: v4l2src device=/dev/video0 ! videoconvert ! video/x-raw, format=I420 ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0
cb_media_configure
cb_unprepared
cb_create_element
host:127.0.0.1,port:8554,abspath:/video0,query:(null)
GST Pipeline: v4l2src device=/dev/video0 ! videoconvert ! video/x-raw, format=I420 ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0
cb_media_configure
cb_unprepared
cb_create_element
host:127.0.0.1,port:8554,abspath:/video0,query:(null)
GST Pipeline: v4l2src device=/dev/video0 ! videoconvert ! video/x-raw, format=I420 ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0
cb_media_configure
cb_unprepared
cb_create_element
host:127.0.0.1,port:8554,abspath:/video0,query:(null)
GST Pipeline: v4l2src device=/dev/video0 ! videoconvert ! video/x-raw, format=I420 ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0
cb_media_configure
cb_unprepared
cb_create_element
host:127.0.0.1,port:8554,abspath:/video0,query:(null)
GST Pipeline: v4l2src device=/dev/video0 ! videoconvert ! video/x-raw, format=I420 ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0
cb_media_configure
cb_create_element
host:127.0.0.1,port:8554,abspath:/video0,query:(null)
GST Pipeline: v4l2src device=/dev/video0 ! videoconvert ! video/x-raw, format=I420 ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0
UDP: [12] wrote 21 bytes
UDP: [12] wrote 21 bytes
...
No video, if I use the uvc.xml and same main.cfg with my usb camera it works in qgc in the companion but not in the computer neither

thank you!!

[MatejFranceskin]

Is the graphics card on the computer where dcm is running Intel GPU or something else?

[FPSychotic]

Is the graphics card on the computer where dcm is running Intel GPU or something else?

exactly it is an Aaeon UP 4Gb with Intel HD400

[MatejFranceskin]

In your output I see lines like:
RTSP stream ready at rtsp://:8554/rsir

Did you try to use
ffplay rtsp://127.0.0.1:8554/rsir
ffplay rtsp://127.0.0.1:8554/rsir2
ffplay rtsp://127.0.0.1:8554/video1
ffplay rtsp://127.0.0.1:8554/video2

instead of:

rtsp://127.0.0.1:8554/video0

ffplay is a command line video player that gives you more output about what is going on.

[FPSychotic]

No I didn't test them as they are the IR cameras of the realsense, the rgb camera is video0.
I will take a look with ffplay.
I think I need a Gstreamer pipeline for vaapi codecs as my gpu is compatible with this api. M

[MatejFranceskin]

This pipeline should work for hadrware accelerated video on Intel HD graphics:
pipeline=v4l2src device=/dev/video1 ! videoconvert ! video/x-raw, format=I420 ! vaapih264enc ! rtph264pay name=pay0
But the first configuration you're using doesn't specify pipeline which means that vaapi is used by default.

Can you try to run dcm like this, it will generate a lot of output but we might see what is wrong:
GST_DEBUG=3 ./dcm -c path_to_your_config

[FPSychotic]

Ohh thank you!!! Even if not work is a lot more than I can make my self.
I tried ffplay with DCM with .conf file and without it, didn't worked. I tested with a realsense d435 too, but didnt work either. Maybe DCM works with realsense r200 because Intel aero RTF drone has a FPGA.
I get video with the webcam in ffplay and other clients in 127.0.0.1 but I cannot get image from other computers neither.
Im going to try that pipeline, thank you again

[MatejFranceskin]

D435 needs librealsense 2.0 and we currently don't support it - support will be added in the future. I thought that R200 is old lib but it might require 2.0

[FPSychotic]

I have both r200 wirh sdk1 and d435 with sdk2 I just tried because dont lose anything xD.
oMG, now I fall, RTSP ports are tcp or udp, because I opened udp, tcp probably are close

[FPSychotic]

I have open udp and tcp ports and this is the main.cfg to can at least get visualize the r200s rgb camera.

[mavlink]
port=14553
broadcast_addr=127.0.0.1
rtsp_server_addr=127.0.0.1
system_id=1

[uri]
video0=http://127.0.0.1:8000/camera-def-rs-rgb.xml

[imgcap]
width=640
height=480
format=2
location=/tmp/

[vidcap]
width=640
height=480
framerate=30
bitrate=1000
encoder=3
format=1
location=/tmp/

[rtsp]
pipeline=v4l2src device=/dev/video0 ! videoconvert ! video/x-raw, format=I420 ! vaapih264enc ! rtph264pay name=pay0

ffplay output
.....
enable-frei0r --enable-libopencv --enable-libx264 --enable-shared --enable-version3 --disable-doc --disable-programs --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libtesseract --enable-libvo_amrwbenc
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
nan : 0.000 fd= 0 aq= 0KB vq= 0KB nan : 0.000 fd= 0 aq= 0KB vq= 0KB [rtsp @ 0x7fb6fc000b80] method DESCRIBE failed: 503 Service Unavailable
rtsp://127.0.0.1:8554/video0: Server returned 5XX Server Error reply
nan : 0.000 fd= 0 aq= 0KB vq= 0KB sq= 0B f=0/0
ihexa@ihexa-UP-CHT01:~$ ffplay rtsp://127.0.0.1:8554/video0

DCM repeat this output constantly

ull)
GST Pipeline: v4l2src device=/dev/video0 ! videoconvert ! video/x-raw, format=I420 ! vaapih264enc ! rtph264pay name=pay0
host:127.0.0.1,port:8554,abspath:/video0,query:(null)
GST Pipeline: v4l2src device=/dev/video0 ! videoconvert ! video/x-raw, format=I420 ! vaapih264enc ! rtph264pay name=pay0
host:127.0.0.1,port:8554,abspath:/video0,query:(null)
i dont wamt disturb probably Im beginner and Im doing something wrong
if I distract to much we can close the thread

[FPSychotic]

GST_DEBUG=3 dcm it sent many errors

AVAHI START
host:127.0.0.1,port:8554,abspath:/video0,query:(null)
GST Pipeline: v4l2src device=/dev/video0 ! videoconvert ! video/x-raw, format=I420 ! vaapih264enc ! rtph264pay name=pay0
0:00:15.919976792 12655 0x7ff230005770 WARN default v4l2-utils.c:189:gst_v4l2_error: error: Device '/dev/video0' is busy
0:00:15.920171858 12655 0x7ff230005770 WARN default v4l2-utils.c:192:gst_v4l2_error: error: Call to S_FMT failed for YUYV @ 320x962: Device or resource busy
0:00:15.920500168 12655 0x7ff238010850 WARN rtspmedia rtsp-media.c:2720:default_handle_message: 0x7ff23805a290: got error Device '/dev/video0' is busy (gstv4l2object.c(3709): gst_v4l2_object_set_format_full (): /GstPipeline:media-pipeline/GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
Call to S_FMT failed for YUYV @ 320x962: Device or resource busy)
0:00:15.920521517 12655 0x7ff230005770 WARN basesrc gstbasesrc.c:3055:gst_base_src_loop: error: Internal data stream error.
0:00:15.920729358 12655 0x7ff230005770 WARN basesrc gstbasesrc.c:3055:gst_base_src_loop: error: streaming stopped, reason not-negotiated (-4)
0:00:15.921275170 12655 0x7ff238010850 WARN rtspmedia rtsp-media.c:2720:default_handle_message: 0x7ff23805a290: got error Internal data stream error. (gstbasesrc.c(3055): gst_base_src_loop (): /GstPipeline:media-pipeline/GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
streaming stopped, reason not-negotiated (-4))
0:00:15.922492764 12655 0x5614916c91e0 WARN rtspmedia rtsp-media.c:2989:wait_preroll: failed to preroll pipeline
0:00:15.922659006 12655 0x5614916c91e0 WARN rtspmedia rtsp-media.c:3293:gst_rtsp_media_prepare: failed to preroll pipeline
0:00:15.927325452 12655 0x5614916c91e0 ERROR rtspclient rtsp-client.c:1044:find_media: client 0x5614918b2150: can't prepare media
0:00:15.928539521 12655 0x5614916c91e0 ERROR rtspclient rtsp-client.c:2898:handle_describe_request: client 0x5614918b2150: no media