Just discovered an excellent camera mod for the G3 by Jishnu. I tried his mod earlier on the LG G2 and his new mod for the G3 works well too.
Jishnu's camera mod V2 with fixed bitrate:
iI am only sharing the mod! All credits to Jishnu for the awesome mod! G3's camera is so fantastic now! To make request or report a bug, post a comment on the OP.
Just flash the mod zip file via CWM/TWRP, or extract the zip, push the files to system/etc and system/priv-app folder and fix permissions.
Note: After flashing the mod, please check the bitrates of your images and videos too!
P.S.- I was told by a member that JISHNU has been banned here. If the mods think that the camera mod does not deserve a place here, please remove it.