Modify startup screen on PSR-SX720

[DGX KEYBOARD]

Good night,

I will request you
How to modify startup screen for PSR-SX720.
It have inspired by a friends, @Gudvi

How can modify startup screen by OS file?

Thanks.

[Gudvi]

Good night,

I will request you
How to modify startup screen for PSR-SX720.
It have inspired by a friends, @Gudvi

How can modify startup screen by OS file?

Thanks.

The startup screen file is stored in the rootfs partition, at rootfs/usr/share/yamaha/images/opening2_psr_sm.rgb565. It uses little-endian RGB565 encoding, with a resolution of 800×480 and a total of 384,000 pixels.

[DGX KEYBOARD]

Step by step in picture/screenshot, please. I dont know.

[DGX KEYBOARD]

And how to convert it custom pictures or videos to Yamaha boot up?