I drive a panel van with no windows on the back except for rear. The dashcam replaces my rearview mirror with an 11" display that can show combinations of all 4 cameras. I've set the display to show (left side + rear + right side) so I have good awareness behind me and who's passing. The side cameras are stuck like repeaters to the side of the van. The video posted above is edited from 4 raw files. The actual display while driving was not choppy. So that makes me think the SD card may be the bottleneck.

This video is choppy, but while driving the display was not choppy.

1. SD Card: Sandisk High Endurance SDXC V30 U3
2. Dashcam: Ekleva F40 (best name I could find) dashcam with 4 cameras
3. Video resolutions / frame rate / bitrate
   • front: 3840x2160 / 25 fps / 12.5kbps
   • rear: 1920x1080 / 25 fps / 3.7kbps
   • left: 1920x1080 / 25 fps / 3.7kbps
   • right: 1920x1080 / 25 fps / 3.7kbps
   • total kbps 23.6kbps

IMO, the resolution is way too overkill for this dashcam, 1080p front and 720p around would have been fine - especially since the quality isn't really that good. But I needed the 4 cameras so this is what I got.

I think I'll try a faster SD card, or add a fan to the unit. I live in the Philippines and the unit gets warm, and the SD card does too. Technically I don't think the display was meant to be running all the time, given you can turn the display off and use it as a regular mirror.