As you can read in this thread in the K2 forum, I created some modified firmwares for the K2. These firmwares offer a higher bitrate for video encoding and minimizes the compression artifacts, which can happen when driving in areas with much details (e.g tree-lined roads).
Now the user @andrew.w.farrar asked me if you could do the same for the C5. Well...of course. So I modified the latest V-42 firmware for the C5 to increase the bitrate at 1080P to 20MBit (default is 14MBit). As I do not own a C5, I am not able to do tests with this firmware, but andrew.w.farrar did some short tests without any problems.
These firmwares are based on the original Firmwares from Innovv, but are modified by me. Therefore they are not supported by Innovv and, of course, come without any warranty.
Also be aware, that a higher bitrate means the size of the video files increases accordingly, which means you definitively need a quality sd card which can handle the higher data rate.
How to install?
Install it just like the original firmware. Download the desired file, rename it to "INNOVVC5.bin" and put it in the root folder of your sd card. Then start your C5 and wait for the flashing process to end. That's all.
How to remove?
Simply install one of the original firmwares to remove the modified firmware.