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Introduction

The RDKC Media Server is much more than a multi-format, multi-protocol server that delivers your media rich content across multiple screens and platforms. The RDK camera software runs on RPi-0/RPI-3 device. With this RTSP streaming we can able to play live streaming content in VLC player. This page dedicated to bringing up and validation of RMS functionality with RTSP streaming in RPI-0/RPI-3. 

Build and Flash Procedure

Refer below link to build camera image

Morty:

RDK-C Build Instruction for RPI-0

RDK-C Build Instruction for RPI-3


Dunfell:

RDK-C rdk-next Yocto 3.1 dunfell build for Raspberrypi

Validation Procedure of RMS with RTSP streaming

STEP 1:

Add require SSID and PSK in /etc/wpa_supplicant.conf file in below format

network={

ssid="username"

psk="password"

}

Console output
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
update_config=1

network={
ssid="XXXX"
psk="YYYYYYYYY"
}


STEP 2:

Add  below configuration in end of the /boot/config.txt file

dtoverlay=imx219

core_freq_min=250

Console output
vi /boot/config.txt

dtoverlay=imx219
core_freq_min=250


STEP 3:

  1. RMS with RTSP validation using v4l2

Disable dtoverlay and minimum freq configuration in config.txt file

v4l2 : Console output
vi /boot/config.txt

#dtoverlay=imx219
#core_freq_min=250


Run mediastreamer binary with v4l2src configuration.

v4l2 : Console output
vi /lib/rdk/startMST.sh

#Run mediastreamer binary in background
# 1. To validate streaming with v4l2 need to give "mediastreamer v4l2src &"
# 2. To validate streaming with libcamera need to give "mediastreamer libcamerasrc &"
# If we change 1 and 2, need to reboot the target and validate streaming.

mediastreamer v4l2src &


        2. RMS with RTSP validation using libcamera

Enable dtoverlay and minimum freq configuration in config.txt file

libcamera : Console output
vi /boot/config.txt

dtoverlay=imx219
core_freq_min=250


Run mediastreamer binary with libcamerasrc configuration.

libcamera : Console output
vi /lib/rdk/startMST.sh

#Run mediastreamer binary in background
# 1. To validate streaming with v4l2 need to give "mediastreamer v4l2src &"
# 2. To validate streaming with libcamera need to give "mediastreamer libcamerasrc &"
# If we change 1 and 2, need to reboot the target and validate streaming.

mediastreamer libcamerasrc &


STEP 4:

Reboot the Target

After Reboot don't do step 1 and 2.

Note : Step 1 & 2 is only applicable for fresh target boot-up with new image.


STEP 5:

Modify needed resolution in rms configuration file

Supported Resolution:

SD:

Width - 640 , Height - 480

Width - 720 , Height - 576

HD:

Width - 1280 , Height - 720

FULL HD  :

Width - 1920 , Height - 1080


Modify resolution in below configuration file

cd /usr/local/rms/bin

vi rms.conf

Console output
RRSIP=XXX.XXX.XXX.XXX
RRSPORT=81
ROOMID=rpi0
RRSSSL=0
WIDTH=1280
HEIGHT=72

After resolution modification need to reboot the target.

Note: This step is not necessary,it is depends on your resolution validation.


STEP 6:

WiFi connection is must needed for RMS validation.

Check WiFi connection by using below command.

ifconfig

Console output
root@raspberrypi3-rdk-camera:~# ifconfig
eth0      Link encap:Ethernet  HWaddr B8:27:EB:87:67:91  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:89842 errors:0 dropped:0 overruns:0 frame:0
          TX packets:89842 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:25639748 (24.4 MiB)  TX bytes:25639748 (24.4 MiB)

wlan0     Link encap:Ethernet  HWaddr B8:27:EB:D2:32:C4  
          inet addr:192.168.43.146  Bcast:192.168.43.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:44 errors:0 dropped:0 overruns:0 frame:0
          TX packets:103 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:4484 (4.3 KiB)  TX bytes:10216 (9.9 KiB)


STEP 7:

check loaded module by using below command

lsmod

Console output
root@raspberrypi3-rdk-camera:~# lsmod
Module                  Size  Used by
bcm2835_v4l2           40563  0
v4l2_common             4809  1 bcm2835_v4l2
videobuf2_vmalloc       6264  1 bcm2835_v4l2
videobuf2_memops        1528  1 videobuf2_vmalloc
videobuf2_v4l2         12640  1 bcm2835_v4l2
videobuf2_core         27389  2 bcm2835_v4l2,videobuf2_v4l2
videodev              154457  4 v4l2_common,videobuf2_core,bcm2835_v4l2,videobuf2_v4l2
media                  23307  1 videodev
brcmfmac              258239  0
brcmutil                7590  1 brcmfmac
snd_bcm2835            21405  0
cfg80211              492836  1 brcmfmac
snd_pcm                79872  1 snd_bcm2835
rfkill                 19936  3 cfg80211
snd_timer              20294  1 snd_pcm
snd                    52949  3 snd_timer,snd_bcm2835,snd_pcm
lirc_rpi                6840  0
lirc_dev                7533  1 lirc_rpi
uio_pdrv_genirq         3469  0
uio                     8703  1 uio_pdrv_genirq
fixed                   2876  0
sch_fq_codel            9662  2
ipv6                  384101  18


STEP 8:

check camera device there or not by using below command

ls /dev/video0

Console output
root@raspberrypi0-rdk-camera:~# ls /dev/video0 
/dev/video0


STEP 9:

Check mediastreamer and rms binaries are running or not before RTSP streaming validation.

ps -Af | grep media

Console output: V4l2src validation
root@raspberrypi3-rdk-camera:~# ps -Af | grep media
root       197     1 13 10:57 ?        00:04:40 mediastreamer v4l2src
root      1007     1  3 10:57 ?        00:01:05 ./rdkcmediaserver ../config/config.lua
root     10959  1943  0 11:32 ttyS0    00:00:00 grep media


Console output: Libcamerasrc validation
root@raspberrypi3-rdk-camera:~# ps -Af | grep media
root       197     1 13 10:57 ?        00:04:40 mediastreamer libcamerasrc
root      1007     1  3 10:57 ?        00:01:05 ./rdkcmediaserver ../config/config.lua
root     10959  1943  0 11:32 ttyS0    00:00:00 grep media


STEP 10:

Enter into the Telnet console with telnet command

telnet localhost 1222

Console output
root@raspberrypi3-rdk-camera:~# telnet localhost 1222
Trying ::1...
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.


After entering the telnet console need to stop webrtc streaming, so we should check webrtc status with "listconfig" command.

Console output
listconfig
Command entered successfully!
Run-time configuration

    dash: []
    hds: []
    hls: []
    metalistener: []
    mss: []
    process: []
    pull: 
      -- 
        configId: 1
        localStreamName: stream2
        status: 
          current: 
            description: Streaming
            uniqueStreamId: 1
        uri: sercom://0
    push: []
    record: []
    webrtc: 
      -- 
        configId: 2
        roomid: rpi0
        rrsip: 18.224.54.11
        rrsport: 81


If the webrtc detail is available in listconfig, we need to stop webrtc with "stopwebrtc" command

Console output
stopwebrtc
Command entered successfully!
Stopped WebRTC Negotiation Service


After did the stopwebrtc, check the listconfig

Console output
listconfig
Command entered successfully!
Run-time configuration

    dash: []
    hds: []
    hls: []
    metalistener: []
    mss: []
    process: []
    pull: 
      -- 
        configId: 1
        localStreamName: stream2
        status: 
          current: 
            description: Streaming
            uniqueStreamId: 1
        uri: sercom://0
    push: []
    record: []
    webrtc: []


STEP 11:

At that same telnet console,need to give the below command for RTSP  streaming

pushStream uri=rtsp://camera_ip:5544 localStreamName=stream2

Example:

pushStream uri=rtsp://192.168.43.146:5544 localStreamName=stream2

Console output
pushStream uri=rtsp://192.168.43.146:5544 localStreamName=stream2
Command entered successfully!
Local stream stream2 enqueued for pushing to rtsp://192.168.43.146:5544 as stream2

    configId: 4
    forceTcp: false
    keepAlive: true
    localStreamName: stream2
    targetStreamName: stream2
    targetStreamType: live
    targetUri: 
      fullUri: rtsp://192.168.43.146:5544
      port: 5544
      scheme: rtsp


STEP 12:

On VLC player, for RTSP streaming

need to enter media → Open Network Stream option and then give rtsp URL to play streaming content in VLC

rtsp://camera_ip:5544/stream2

Example :rtsp://192.168.43.146:5544/stream2

We can able to see the live streaming content on VLC Player.

Note: VLC player available PC and RPI target should run in same network.

Limitations

  •  RMS validation with libcamera works only with SD resolution.
  • Observed 2 to 3 sec's of glitches in RMS with RTSP validation using both v4l2 and libcamera
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