Marcus 2 Inconsistent Bitrate

[justinsane]

I installed the Vico Marcus 2 on my mom's car a while back and never really inspected the files. Videos look good and the smart parking mode feature actually works. But I'm noticing a pretty big variance in the bitrates.
I'm not referring to fluctuations within one file of a few kbps but actual mbps here and there

Here are some random ones I pulled off of the card randomly. Some are ~9mbps while some are ~13 mbps. What accounts for this difference?
I considered that parking footage might've been lower but the I opened some parked footage and they were still 13.5 mbps. And then I looked at night driving footage which was ~12.5 mbps. Some of my night time parking footage was at 9.5 mbps though

 

[Street Guardian USA]

It's called VBR Variable Bit Rate
(as opposed to CBR which is Constant Bit Rate)

 

[justinsane]

It's called VBR Variable Bit Rate
(as opposed to CBR which is Constant Bit Rate)

Ah I see, what's the purpose of it?

 

[Street Guardian USA]

Ah I see, what's the purpose of it?

https://en.wikipedia.org/wiki/Variable_bitrate

 

[VicoVation]

Hi @justinsane! @Pier28 is exactly right about the case. What we want to give you is the best quality for the byte: the smallest file size you can achieve while retaining video quality. All in all, the purpose is so the storage can be used in a more flexible way.

 

[Street Guardian USA]

Problem with Variable Bit-rate is often times it won't adjust from low to high fast enough when transitioning between varying conditions , scenes and then critical detail is missed for a few seconds. (could miss something important)