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Rather than buy a dash camera I was wondering if my Nokia Lumia can substitute for one. It's an 820 so it can take an SD card, I've got a 32gb one to already in, and I've set new video to be recorded onto the card. I also have a windscreen mount.

How much video am I likely to be able to record with the phone on the standard settings and are there any settings I should use to optimise for this purpose?

  • Are you asking about the mounting, or how much time you'll get on a 32Gb card? – Rowland Shaw Jul 5 '13 at 20:46
  • I meant how much time, sorry, I thought it was obvious – user413 Jul 8 '13 at 7:58
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I don't own a Lumia 820 but this calculation shown be a good guide for how much time you can record.

According to the Lumia 820 specs on the Nokia website, the main camera records at 1080p with a frame rate of 30 fps. I assume these are the "standard settings" that you refer to.

Assumptions: compression ratio for the video recorded is 60:1

Calculation:

Frame size K = ( [Pixel Width x Pixel Height x Bit Depth] / 8 ) / 1024
K = ( [1920 x 1080 x 24] / 8 ) / 1024 = 6075 KB / frame
6075 KB/frame x 30 frames/sec = 182250 KB/sec
182250 KB/sec  /  60 compression ratio = 3037.5 KB/s compressed
3037.5 KB/sec compressed * 60 s / min * 1 MB / 1024 KB = 177.98 MB / min
32 GB * (1024 MB / GB) / 177.98 MB / min = 184 minutes

So there you have it, approximately 184 minutes of HD video with 32 GB of storage.

Hope this helps.

Space saving tip: sync your videos to a PC whenever you have a chance.

Some of the calculation metrics were borrowed from a similar calculation made for iPhones.

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For security purposes only, you can delete recorded video files if accidents did not occur and start recording all over again. Of course it´s possible to upload to cloud storage or save vids into any mass media device.

  • This is not really what the OP asked. He wants to know how much video footage can be stored on his phone at a time - of course he can delete the videos later. – Thomas Feb 26 '16 at 12:33

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