Hi guys! To answer your questions...
Originally Posted by Riyal
Sad truth Xperia Z and Z Ultra won't really have any 4k support.
For Xperia Z the issue is the processor which is snapdragon s4 pro that doesn't really support 4k.
And For Xperia Z Ultra although the processor support 4k the camera can't. 4k video is literally 8megapixels of resolution and Z Ultra's camera is also 8mp. The problem is... Xperia Z Ultra's camera max resolution is 3264 x 2448 and the 4k video that snapdragon processors support is only @ 3840x2160
As you can see there... The width of the camera just won't work. The sensor should be a little bit more wider in order for 4k to work.
With regards to the crashes when selecting repeatedly the camera shortcut add on of 4k and timeshift video it's just a cosmetic bug that happened when I moved the shortcuts from the homescreen to the camera add on tray. I haven't completely read the documentation of adding camera add ons on the sony sdk hence I think it wasn't properly implemented. Regardless I don't think that bug is worth looking at. Anyways why would you even reselect 4k or timeshift video when it is already selected?
With regards to the person who wanted to remove the 4k option just decompile the apk open androidmanifest.xml(or upload it here so I could point you on what codes you should remove) and remove the part there about the 4k shortcut and recompile.
Don't have the development tools right now as I just reformatted my PC and I'm to busy with my new dog right now
Also with regards to update we're pretty much stuck at the moment. As I've said previously the video stabilization and some other issues you're experiencing is due to outdate Z2 camera libs that we are using at the moment. Z1 and Z1 Compact has a more recent version of the camera driver and it has some incompatibilities with the current libs we are using hence we don't have any choice other than wait for Z2 4.4 update so we could get the more updated camera libs to match with out current device' firmware.
I could literally fix the issues but it's more of downgrading the current Z1 series camera drivers back to 4.3 and match it against the Z2 drivers and these have the cons of
1. Downgraded camera driver
2. Requires an unlocked bootloader
3. Requires a custom kernel
Which would limit the usability of the mod to those willing to unlock their bootloader and flash a custom kernel.
I don't really have any other choices though since we only have the kernel source codes to modify and not the camera libs because sources aren't available.