I am recording video with my Canon T2i DSLR, but it keeps stopping to say video recording has stopped automatically. I googled the problem and read that my SD card has to be fast for it to work. While I am recording 1080p at 30 FPS, I have a Transcend class 10 16GB SDHC card which makes it seem unlikely that the card is the source of the problem. Any suggestions?

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    There are a lot of counterfeit cards floating around. If you got it on eBay it is probably fake. Try another card purchased through a reputable dealer. – Michael C Feb 10 '14 at 1:41
  • I purchased it directly from Amazon. Any other suggestions? – joshreesjones Feb 10 '14 at 1:56
  • How long before it stops? There are limits to prevent it being classed as a video camera. – John Cavan Feb 10 '14 at 1:56
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    Get a quality card that has reliable write-speed. Despite high-ratings, low-end cards often cannot sustain their advertised speed continuously. – Itai Feb 10 '14 at 2:40
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    Here's another SE user with a Transcend Class 10 not working for 1080p@30fps. – drfrogsplat Feb 10 '14 at 7:24

Benchmark the card read/write speeds on your (or someone else's) computer.

Class 10 should read & write at speeds of at least 10 MB/sec.

For stable recording at 1080p@30fps, you probably need about 6 MB/sec minimum write speed. If the card isn't performing at its specified rate, then this could be your problem.

You could use something like hdtune on Windows, or Blackmagic Disk Speed Test on Mac OS X.

  • I think that was the issue. PSA: buy reputable SD cards! – joshreesjones Mar 3 '17 at 17:30

Two things come to mind:

  1. Check your owner manual to verify your card is compatible with your camera.
  2. then, go to the card maker website and search cards for highest transfer speed for your camera.

This should help you to rate your card.

You'll find higher transfer speeds cost more money. Example: 95mb transfer speed for my camera was $60.

  • HD video requires about 6MB/sec. write speed. Transfer speed is usually measured as read speed. In either case a 95MB read speed is overkill if the only concern is recording HD video. The problem here isn't a card that only writes at 10MB/sec. The problem is likely a card that is supposed to write at 10MB/sec but doesn't. – Michael C Feb 10 '14 at 11:02

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