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1. Take the latest RDK-V hybrid image and copy it to SD card using sudo dd command as below.
   1. command: sudo dd if=<image> of=<device path> bs=4M
   2. example: sudo dd if=rdk-generic-hybrid-westeros-wpe-image-raspberrypi-rdk-hybrid-westeros.rpi-sdimg of=/dev/sdb bs=4M
2. Download the latest NOOBS image from the link (http://downloads.raspberrypi.org/NOOBS_latest).
3. Mount the copied SD card and note down the full sizes of the two partitions on the SD card
   1.  raspberrypi -  /media<pc login name>/raspberrypi - kernel partition
   2.   other partitions-/media/<pc login name>/ mount point> - rootfs partition
      (Linux users: type df-h in the terminal). We need to create hyb_boot.tar from raspberry pi kernel partition and hyb_root.rar from other rootfs partition.
4. From the command line on your primary computer, navigate to where the other rootfs partition is mounted i,e

   /media/<pc login name>/mount point> and issue below command.

   1. command: sudo tar -cvpf ~/Desktop/hyb_root.tar ./*
   2. This will create the hyb_root.tar file on your desktop.
5. Note down the size of hyb_root.tar.
6. Navigate to your desktop with cd ~/Desktop/ and compress the root tarball by using below command. 
   
   1. command: xz -9 -e -v hyb_root.tar .
   2. This will generate “hyb_root.tar.xz” file on your Desktop.
7. Now we need to do the same thing to the raspberrypi kernel partition.
8. From the command line, navigate to the raspberrypi kernel partition folder  where it is mounted i,e  /media<pc login name>/raspberrypi  and create a tar ball by using same command.
   1. Command:  sudo tar -cvpf ~/Desktop/hyb_boot.tar ./*
   2. this will create the hyb_boot.tar file on your desktop.
9. Note down the size of hyb_boot.tar
10. Navigate to your desktop with cd ~/Desktop/ and compress the boot tarball with below command.
    
    1. command: xz -9 -e -v hyb_boot.tar .
    2. This will create “hyb_boot.tar.xz” file on your Desktop.
11. Once NOOBS image downloaded from (http://downloads.raspberrypi.org/NOOBS_latest) . Unzip it, and open up the 'os' folder. Duplicate NOOBS folder and it will look like below.
    Image Added
12. Open os folder and duplicate the 'Raspbian' folder and rename it 'rdkv_hybrid'.
13. Open up 'partitions.json' and make the following changes:
    
    1. Change the label to “hyb_boot” and “hyb_root” in boot and root partitions respectively.

    2. Change the value for partition_size_nominal for both boot and root partitions with the values from step 3 in megabytes. We But we may have to give triple the partition size obtained from step 5 and step 9 to make sure the image is loading our rdk images to be loaded properly . Since this is used by NOOBS to determine how much space will be on the SD card after install, it's better to round up than down.

    3. Change the value for uncompressed_tarball_size to be the values from step 5 and 9.
14. Open 'os.json' and make the following changes:
    
    1. Change name to rdkv_hybrid
    2. Change whatever else you want.
15. Rename 'Raspbian.png' to 'rdkv_hybrid.png' and replace it with an appropriate icon.
16. Replace any or all of the files in the 'slides_vga' folder with appropriate images. These will be shown during the install process.
17. Replace the  'root.tar.xz' and 'boot.tar.xz' with  'hyb_root.tar.xz' and  'hyb_boot.tar.xz' files created in steps 6 and 10.
18. Again format SD card in FAT32 format and copy the rdkb_noobs folder into it, rdkv_hybrid should be available as an option in the OS list next to Raspbian.
19. Similarly convert the other RDKV_client and RDKb images into NOOBS image if needed.

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In AV mode, after installing the required images, if we also want to boot images in AV, then we need to modify the corresponding image boot/config.txt file as shown below.

Validation process using single image

Changing output display of RDK images to Composite AV display

After installing the required rdk image if we wants to boot the image in AV display, then we need to do below mentioned changes to the corresponding rdk image config file.  By default all All rdk images will support HDMI output display by default. If we want to configure AV output display for any single rdk image then we need to modify /boot/config.txt file of that particular image as shown below:

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