Thank you for your answer. I've study this thread before but didn't find the answer if upgrading from 12 to 15Mbps will do any diffrence in quality. Someone write here that he didn't notice any diffrence. I would check it myself if I only have backup of existing firmware (can't find my firmware anywhere, can't also find information how to go to service mode). For now I'm happy with DA380-150424v01, everything works fine and don't know if upgrading to much older firmware is a good choice.
Are you sure your camera records at 12Mbps only?
15Mbps was introduced at some point as the standard bitrate for this camera within a firmware update. In other words, it was no longer needed to upload a firmware from other cameras as the stock one already increased the bitrate do 15Mbps. I have the firmware from the beginning of 2015 that was posted in this thread and it records at 15Mbps. Works perfectly fine and I can tell the difference in quality between this firmware and some older one the camera came with.
I would find it really strange if a newer firmware (that you have) would decrease the bitrate back to 12Mbps.
EDIT:
Apparantely as strange as it looks, it actually seems to be the case that the newer firmware versions dropped the bitrate back to 12Mbps.
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