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Introduction

The RDK Media Streamer 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 deviceNormal Thumbnail will get YUV data from RPI-0 camera device and it will convert YUV buffer into JPEG image based on openCV and then stored generated JPEG image in local /tmp directory . This page dedicated to bringing up and validation of RMS Normal Thumbnail functionality in R-Pi Zero. 

Required Equipment

• Raspberry Pi 0 Device
• SD Card
• Power Cable
• OTG Cable
• Standard USB keyboard
• Mini HDMI connector
• HDMI Cable
• Television set/monitor with HDMI input

System Setup

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Environment Setup

Please refer below link for RPI-0 Environment setup

RDK-C Environment Setup

RMS Flow - Environment Setup Diagram

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Yocto Build Steps

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Build Procedure

Refer below link to build camera image

RDK-C Build Instructions for R-Pi

Image Flash Procedure

$ sudo dd if="Image Name" of="Device Name" bs=4M

Example:
sudo dd if=rdk-generic-camera-image_default_20200130060729.rootfs.rpi-sdimg of=/dev/sdb bs=4M

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Normal Thumbnail Validation Procedure

STEP 1:

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

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

network={
ssid="RDK"
psk="Comcast1"
}

STEP 2:

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 3:

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  :

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Modify resolution in below configuration file

cd /usr/local/rms/bin

vi rms.conf

RRSIP=18.224.54.11
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 4:

WiFi connection is must needed for RMS validationneeded to copy captured JPEG Image from /tmp directory into your PC.

Check WiFi connection by using below command.

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root@raspberrypi0-rdk-camera:~# ifconfig
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:87 errors:0 dropped:0 overruns:0 frame:0
          TX packets:87 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:4552 (4.4 KiB)  TX bytes:4552 (4.4 KiB)

wlan0     Link encap:Ethernet  HWaddr B8:27:EB:2E:72:2B  
          inet addr:192.168.43.246  Bcast:192.168.43.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:23 errors:0 dropped:0 overruns:0 frame:0
          TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:2893 (2.8 KiB)  TX bytes:5887 (5.7 KiB)

STEP 54:

check loaded module by using below command

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root@raspberrypi0-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 65:

check camera device there or not by using below command

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

STEP 7:

On Bowser of PC:
http://dh-livevid-dev.comcast.com/bryan/demov3/evoplayersTest.html
Need to modify roomid as rpi0

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Press "PLAY" button in WebBrowser page.

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STEP 6:

check rdkcmediaserver( RMS ) binary is running or not.if it is running then we need to stop RMS binary running because we can't able to validate Normal Thumbnail while running RMS application.

root@raspberrypi0-rdk-camera:~# ps -Af | grep rdkcmediaserver
root       659     1 22 10:24 ?        00:00:43 ./rdkcmediaserver ../config/config.lua
root      4911   381  0 10:28 ttyS0    00:00:00 grep rdkcmediaserver

if we get above status then need to do below step.

root@raspberrypi0-rdk-camera:~# systemctl stop rms-launcher

STEP 7:

Run rormal_thumbnail binary by using below command

root@raspberrypi0-rdk-camera:~# normal_thumbnail

STEP 8:

Get JPEG image from local /tmp directory.

root@raspberrypi0-rdk-camera:~# cd /tmp/
root@raspberrypi0-rdk-camera:/tmp# ls thumbnail2020-06-28\:10\:33\:57..jpeg 
thumbnail2020-06-28:10:33:57..jpeg

STEP 9:

Copy JPEG image from your RPI /tmp directory into you local PC.

xxxxxx@yyyyy-Lenovo-B480:~/THUMBNAIL$ scp root@RPI_DEVICE_WIFI_IP:/tmp/thumbnail* .

Example:
xxxxxx@yyyyy-Lenovo-B480:~/THUMBNAIL$ scp root@192.168.43.246:/tmp/thumbnail* .
thumbnail2020-06-28:10:33:57..jpeg                                                                           100%   16KB  16.4KB/s   00:00    
xxxxxx@yyyyy-Lenovo-B480:~/THUMBNAIL$