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FORUMS Post Processing, Marketing & Presenting Photos Video and Sound Editing 
Thread started 16 Dec 2011 (Friday) 23:11
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can't record videos with class 4 sd cards with canon 60d

 
mealiveiclick
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Dec 16, 2011 23:11 |  #1

can't record videos with class 4 sd cards with canon 60d. After a few seconds of recording it will turn off after a brief message saying the recording is stopping.

But it doesn't happen when i record with my class 10 sd card


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skwirnmn
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Dec 17, 2011 00:12 |  #2

class doesn't really matter in all honesty.. it's the read and write speed of the card. i have an 8 gig class 10 that i use, and i also have two 16 gig class 4's that i use. all of them work just fine.




  
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mealiveiclick
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Dec 17, 2011 00:37 |  #3

What did you set your SD cards before hitting the format button?


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Dec 17, 2011 01:19 |  #4

Canon recommends Class 6 I believe for video work. Class does matter IMO as it's supposed to give a minimum write speed of the card. Write speed may be higher than the card is rated at but not high enough to reach the next class reliably. It's much like how they end up rating CPU clock speeds (or used to anyhow).


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John ­ Sims
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Dec 17, 2011 03:25 |  #5

All cards are not made equal. Just use Class 10 and you won't have any issues.


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Sickone
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Dec 17, 2011 03:52 |  #6

John Sims wrote in post #13557941 (external link)
All cards are not made equal. Just use Class 10 and you won't have any issues.

this, can't understand why people don't just stick to class 10 all the time.

I get mine from here

http://www.scan.co.uk …apacity-sdhc-flash-memory (external link)

half the price of any high street retailer




  
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MarKap77
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Dec 17, 2011 09:43 |  #7

mealiveiclick wrote in post #13557419 (external link)
can't record videos with class 4 sd cards with canon 60d. After a few seconds of recording it will turn off after a brief message saying the recording is stopping.

But it doesn't happen when i record with my class 10 sd card

Your camera puts out data to the card at a certain rate. The card must be able to accept that data stream. If it can't, the buffer fills up. When that happens, the camera stops recording.

Your class 4 cards are supposed to be rated to accept a 4 megabyte per second (MB/sec) data stream. The Class 10 cards are rated at 10 MB/sec. So, it would seem that your camera is outpacing the Class 4 card's ability to write the data fast enough, while the Class 10 cards are able to do so.


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ChasWG
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Dec 17, 2011 11:09 |  #8

This must be a syntax thing between CF cards and SD cards. They are both solid state media, but CF cards have clearly labeled read/write speeds on them. Not so much with SD cards. I know that with my 7D if I don't have a card that is at least 30MB/s and 400X, it won't work very well.

I recently had an issue with my Sound Devices 552 mixer with it's built in two channel recorder. During a certain operation the recorder would stop and tell me that the SD card was too slow. Funny thing is I have been using both the 16gig SanDisk and the 8gig Toshiba cards back to back for over a year now with none of these issues. So I looked into what "class" or MB/s that this recorder wanted to have, knowing that read/write speed is very important.

Only the SanDisk said anything about it's speed on it (15MB/s) and the Toshiba had nothing. And then to find out that Sound Devices has no real definition for the required speed needed by these machines listed either.
In the end, it had nothing to do with the cards at all, but a firmware bug that I found. Audio doesn't need a very fast card at all. I still don't know what "class" my SD cards are. I know they work for what I need them to do.

But CF cards almost always have read/write speeds listed in their specs as well as another number (400X, 600X and so on) this info gives a better understanding of how fast a card is and if it will do the job for what you intend to use it for. What the heck does "class" mean anyway?


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artyman
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Dec 17, 2011 11:38 |  #9

It's about time that card manufacturers standardised on measurement of speed, class, MB's or NNNx I don't mind but one system would be preferable.


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Goodysgotacuda
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Dec 17, 2011 11:40 |  #10

I had a Class 6 SanDisk in my T2i, on 1080p it'd time out almost instantly. Swapped it for a class 10 SanDisk, not a hiccup. It also works out quick RAWs a lot smoother.


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MarKap77
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Dec 17, 2011 20:02 |  #11

artyman wrote in post #13559042 (external link)
It's about time that card manufacturers standardised on measurement of speed, class, MB's or NNNx I don't mind but one system would be preferable.

See the following for the standards as specified by the Secure Digital Association.

https://www.sdcard.org​/consumers/speed/ (external link)


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Bruce ­ Foreman
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Dec 27, 2011 02:59 |  #12

Goodysgotacuda wrote in post #13559048 (external link)
I had a Class 6 SanDisk in my T2i, on 1080p it'd time out almost instantly. Swapped it for a class 10 SanDisk, not a hiccup. It also works out quick RAWs a lot smoother.

The Class (6) may have been counterfeit. SanDisk is the most counterfeited card on the market.

I've still got one Class (6) 20MB/s SanDisk card left and it works fine in both my 60D and T3i.




  
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can't record videos with class 4 sd cards with canon 60d
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