Introduction
Normal 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 Normal Thumbnail functionality in RPI-0/RPI-3 B+
Build Procedure
Please refer below link to build camera image
Morty:
RDK-C Build Instruction for RPI-0
RDK-C Build Instruction for RPI-0
Dunfell:
RDK-C rdk-next Yocto 3.1 dunfell build for Raspberrypi
Normal Thumbnail Validation Procedure
STEP 1:
Add require SSID and PSK in /etc/wpa_supplicant.conf file in below format
network={
ssid="username"
psk="password"
}
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:
WiFi connection is needed to copy captured JPEG Image from /tmp directory into your PC.
Check WiFi connection by using below command.
ifconfig
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 4:
check loaded module by using below command
lsmod
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 5:
check camera device there or not by using below command
ls /dev/video0
root@raspberrypi0-rdk-camera:~# ls /dev/video0
/dev/video0
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 normal_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 your 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$
Limitations
Can't able to validate RMS( RDK Media Streamer ) and CVR( Continuous Video Recoding ) features while validating Normal Thumbnail feature.
