Three second gaps between dash cam videos

[TIppy]

The dash cam is supposed to save 60, one minute videos in a continuous loop. The time stamps on my videos are 61 seconds apart and are only 58 seconds long. This leads to a 3 second gap between the end of one video and the beginning of the next. Someone nearly backed into me in a parking lot, and when I went to review the videos, the incident just happened to fall in the 3 second gap. If an accident had happened, I wouldn't have had a record of it.

Anyone else have these three second gaps?

I'm using a 256GB ssd drive with a 330 MB/S write speed, so I don't think it's the ssd.

 

[TIppy]

So everybody else has seamless transitions from one video file to the next?

 

[srredbeard]

I just confirmed the same gap.

I am using a Raspberry Pi configured to act as a self repairing storage device. I agree that it isn't your storage device.

 

[TIppy]

I just confirmed the same gap.

I am using a Raspberry Pi configured to act as a self repairing storage device. I agree that it isn't your storage device.

Thanks for checking.

Murphy's law seems to operate here. The last two things I wanted to check on the videos fell right in the three second gaps.

 

[quickstrike12]

What cluster size did you format to? Default is 32kb I think. Others I’ve seen have had better luck with smaller like 8kb cluster formatting
It’s possible it makes a difference in the ability of the car to write fast enough to the stick or causes this effect. just a thought.

 

[TIppy]

What cluster size did you format to? Default is 32kb I think. Others I’ve seen have had better luck with smaller like 8kb cluster formatting
It’s possible it makes a difference in the ability of the car to write fast enough to the stick or causes this effect. just a thought.

Tried the 8kb cluster size, and I have the same 2 to 3 second gaps between clips. It can't be a write speed problem. This ssd can write at 330 Mb/sec. For some reason the clip sizes are often only 58 seconds long instead of 60.

Although the drive is usbc and can write at 330 MB/sec, the usb ports in the car are usb2 which are limited to about 30MB/s. The 4, 1-minute clips total about 100 MB, so it takes about 3 seconds to write this much data. It's seems the mcu isn't both capturing the next one-minute clips and writing the current ones at the same time.

 

[SSonnentag]

The dash cam is supposed to save 60, one minute videos in a continuous loop. The time stamps on my videos are 61 seconds apart and are only 58 seconds long. This leads to a 3 second gap between the end of one video and the beginning of the next. Someone nearly backed into me in a parking lot, and when I went to review the videos, the incident just happened to fall in the 3 second gap. If an accident had happened, I wouldn't have had a record of it.

Anyone else have these three second gaps?

I'm using a 256GB ssd drive with a 330 MB/S write speed, so I don't think it's the ssd.

I noticed the same thing in my parking lot backing incident...
I was laying on the horn from the time he started backing until he pulled forward again.

 

[whitex]

Using Tesla as a dashcam is like using it for a browser. Sure the car has this listed as a feature, but it's not it's primary purpose, not a revenue source, it's not a focus for the team since they have a million and one other things Elon already sold which have have to deliver, so it's not going to be great or reliable. If you want to play games, buy a PC or a gaming console, don't buy a Tesla to play video games. If you want a reliable dashcam, buy and install a dashcam from a company which does dashcams. If you just want a dashcam feature to show your friends and don't care if it's not very reliable, then you use a Tesla for a dashcam,

 

[srredbeard]

My Blackvue does not have the same gap that the Tesla cam does. The Tesla system using 4 cameras has some coverage my 2 camera system doesn't. With all 6 cameras I have very good coverage.

I don't think Tesla needed to provide a dash cam system but they did and there are lots of people that depend on it now, and why wouldn't they. All they had to do was put a USB stick and they got a dash cam system.

The three second gap is likely the result of a simple software decision that should be easily changed.

Aside from the 3 second gap there are other issues that I have with it. Not using the entire partition for storage but instead only keeping a the last hour, or last trip, whichever it does now, is an unnecessary design choice.

 

[quickstrike12]

Sadly it keeps recording after being parked with a 1 hour scrolling window. ive gone out and tried to look at the last drive and it’s gone. Replaced by an hour’s worth of my garage wall.

Not good.