Rear Dashcam 0.15.6 for Gen5W

Rear dashcam 0.15.6 for Gen5W head units (Android 4.4), as a NEMESIS package: the recorder service and the Dashcam playback app in one install.

Changes in this version:

360° camera cars aren't supported; steering-wheel save on more models

• Cars with a 360° (surround view) camera aren't supported, and the installer now says so. On these cars (the IONIQ 5 Limited and other 360° trims, and the Kia EV6 tested so far), the camera only sends a picture while the car is showing its own camera view, so the dashcam would record nothing. The installer checks your car's camera and refuses with "camera system not supported (360 view cars)". If it can't tell, it installs, and the Dashcam app says the camera isn't supported instead of recording.
• Saving with the steering wheel's mute button (four quick presses) should now work on other models, not just the IONIQ 5 it was built on. The recorder now finds the head unit's button device by its own model name.

As always, reboot the head unit after installing or updating, so the camera picture stays hidden under Android Auto and CarPlay.

Install over ADB with nemesis install --update dashcam-0.15.6.zip, or by USB: extract dashcam-0.15.6-usb.zip onto the root of a FAT32/exFAT drive and plug it in. Reboot the head unit after installing or updating to activate the camera overlay fix. Recordings and the recording on/off setting carry over when you update. Check downloads against SHA256SUMS. DashcamPlayer.apk is the app on its own; the package already contains it.

If the reverse camera ever fails to come up, stop and report it, and uninstall the package until it's fixed. Details in the README.