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

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

vi /boot/config.txt

dtoverlay=imx219
core_freq_min=250 

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 &

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)

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

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

root@raspberrypi3-rdk-camera:~# ps -Af | grep media
root       197     1 13 10:57 ?        00:04:40 mediastreamer
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

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: []

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