[GUIDE][MOD] Splash Image

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Ever since I got S-OFF on my G1, I set up a custom splash image. Here's how to do this on the Doubleshot (MyTouch 4G Slide).

Info:
The Doubleshot stores the splash image on the /dev/block/mmcblk0p14 partition, even though it only uses the first 768k of the 6MB partition. By default, this is a white image with green letters spelling the 'myTouch 4G slide' logo in the center of the screen and the '-T---Mobile-' gray and magenta logo above it.

Prerequisite:
Install and get familiar with the Android SDK see Android SDK | Android Developers also [HOW-TO] ADB for Dummies(How-To Learner's Guide) G1 Android Development
Unlock your T-Mobile MyTouch 4G Slide / HTC Doubleshot see How To Turn S-Off, Install MoDaCo Clockworkmod Recovery, and Install a Rom For Dummie
Install FFmpeg
Windows:
Extract the ffmpeg.exe file from the bin folder in ffmpeg-r25512.7z
- or Shortcut - get the getsplash.zip from gariak
Install the adb (Android Composite ADB Interface) and fastboot (Android Bootloader Interface) drivers from the android-sdk-windows\extras\google\usb_driver folder
Mac:
Might find this ffmpeg guide helpful - An easy install of the ffmpeg command line tool - Mac OS X Hints

Backup: (Optional)
To get the current image from the phone, execute this from a root shell:

dd if=/dev/block/mmcblk0p14 of=/sdcard/splash.img

On your computer, you can turn this into a PNG using ffmpeg from the command line:

ffmpeg -f rawvideo -pix_fmt rgb565 -s 480x800 -i splash.img -f image2 splash.png

Flash:
You can set the splash by converting an image you want to a 480x800 resolution PNG file, then use ffmpeg to convert it to raw565 format using the command line:

ffmpeg -i new_splash.png -f rawvideo -pix_fmt rgb565 new_splash.img

Then with an unlocked (S-OFF) bootloader, flash the new_splash.img file to your phone:

adb reboot bootloader
fastboot flash splash1 new_splash.img
fastboot reboot

OR you can flash from a terminal window on your phone. Be very careful with this method and triple check that you typed everything correctly so you do not accidentally brick your phone:

dd if=/sdcard/splash.img of=/dev/block/mmcblk0p14

References:
[GUIDE][MOD] Splash Image
[Request] MyTouch splash screen?
[TOOL] [Linux / OSX] Splash Screen creator / flasher
gravis86
gariak
An easy install of the ffmpeg command line tool - Mac OS X Hints
wilnotdie

Absolutely fantastic write up!

This is just the kind of information that belongs here in the dev section.

I like how you explained a lot of information that wasn't exactly necessary, but is very helpful to continue developing this topic in new directions.

Before anyone comes in and says there are threads on how to do this in the "themes and apps" section of the MT4GS forums, let me point out that they do not go into the detail and depth that this guide has done, and this write-up shows how to do it all manually.

Thank you for taking the time to lay this all out so people can see the process, and do it on their own.

MT4GS "themes and apps" links:
Replace your splash screen

Charlieb's gallery of pre-made boot splash images that you can flash with the new method listed here in dev:
Gallery Of Custom BootSplash Screens To Choose From

Great write up, much appreciated.

This was already posted back in September...

Already posted. Also wrong section.

Sent from my mt4gs

Originally Posted by Madblaster6

Already posted. Also wrong section.

Sent from my mt4gs

No, it hasn't, and no, it's not.

This is very helpful Dev material, which I have already been referencing to try to solve a splash flashing issue.

Please post a link to where it was already posted if you think that was the case, but there are no other dev postings to my knowledge that contain this very useful information.

Originally Posted by Blue6IX

No, it hasn't, and no, it's not.

This is very helpful Dev material, which I have already been referencing to try to solve a splash flashing issue.

Please post a link to where it was already posted if you think that was the case, but there are no other dev postings to my knowledge that contain this very useful information.

Androidautobot referenced this writeup back in September on the MT4GS part of the site....
http://forum.xda-developers.com/show....php?t=1258873

@reukiodo - I used your method back in my G2 days so I thank you for that.

Not meaning to steal some else's spotlight but in case anyone seriously needs a noob proof method as posted by others as well and the way I did it back when I still had a MT4G is to go with TrueBlue_Drew's method....You'd have to be a true square headed moron to screw up...
http://forum.xda-developers.com/showthread.php?t=956434

Thanks, jsyi84.

I know about those links in the themes & apps section - and for users that's great.

Neither of the two threads in themes & apps contain the developers info that is included in the OP of this thread.

That's okay, it's not their purpose, which is why they are over in themes & apps.

This thread is a reference for people working on creating things like the utilities linked to in the other threads, and not really targeted at end users.

Originally Posted by jsyi84

This was already posted back in September...

Originally Posted by Madblaster6

Already posted. Also wrong section.

I apologize if you think this is a duplicate post or in the wrong section. In my search I was looking for which partition the splash image was stored on, and was unable to find that information.

Now with the reference provided, I see that information was already available, however difficult to find.

In response, I hope you agree that this post has all the information related to the splash image in one location, including a copy of the original splash image.

Originally Posted by reukiodo

I apologize if you think this is a duplicate post or in the wrong section. In my search I was looking for which partition the splash image was stored on, and was unable to find that information.

Now with the reference provided, I see that information was already available, however difficult to find.

In response, I hope you agree that this post has all the information related to the splash image in one location, including a copy of the original splash image.

It's a very valuable piece of information I figured you'd be happy to know someone else already posted a topic referencing your topic lol. I agree it's easier for others to find posted here than having to hunt around in another phones forum lol.....sort of like how some people had to go in the g2 forums to downgrade to 2.2 in order to root their phones in the mt4g forums which only adds to confusion to some as for most people it's a red flag having to do stuff to their $400+ device from information posted for an entirely different phone lol.