How To Enable HD Video Recording In iPhone 3gs

The iPhone 3GS is decisively starting to look outdated on the video front with its modest VGA capabilities. Fortunately the hacking community is right here to save it from mediocrity and bring it back on par with the best.

Well, the iPhone 3GS isn't at the HD stage just yet but it just hit 1080 x 800 pixels at 30 fps. And the best news is you can mod your phone yourself as long as it's jailbroken. You can now enable HD video recording on your jailbroken iPhone 3GS, running iOS 4.x. ARM Cortex processor on iPhone 3GS is apparently capable of handling 720p video encoding, it is just that Apple has imposed some limitation in the software which Mike has successfully managed to bypass to allow video recording at 1080×800 @ 30fps at up to 20Mbps. The default settings for video recording on iPhone 3GS are: 640×480 @ 3Mbps.

Simply follow the instructions posted below to get it working on your iPhone 3GS. It worked perfectly on iPhone 3GS jailbroken using Limera1n on iOS 4.1.

Step 1: First up, you will need to jailbreak your iPhone 3GS. You can find the method here to jailbreak your iPhone 3gs.

Step 2: Next, you will need to install OpenSSH. To do this, Open Cydia, touch on “Search” tab and then search for “OpenSSH”. Install this app and reboot your iPhone.

Step 3: Connect your iPhone 3GS with your computer. Make sure iTunes is not running.

Step 4: Download and install Cyberduck for Mac or WinSCP for Windows. Enter the following details to login to your iPhone:

Cyberduck

Server: The IP address of your iPhone/iPad/iPod touch. Settings –> WiFi –>
Username: root
Password: alpine
Protocol: SFTP (SSH File Transfer Protocol)

WinSCP

Hostname: The IP address of your iPhone/iPad/iPod touch. Setting –> WiFi –>
User name: root
Password: alpine
Protocol: SCP

Step 5: Download HDVideo3GS.zip file from here.

Step 6: Now navigate to /System/Library/PrivateFrameworks/Celestial.framework/N88/ directory and copy AVCapture.plist, CameraRollValidator.plist and MediaValidator.plist files in this location as shown in the screenshot below.

Step 7: Now restart your iPhone 3GS and you have HD on your iPhone 3gs.
Take a look on iPhone 3gs HD video recording  sample before proceed.

Source