Write speeds of current SD cards and how they affect recording of videos??

Started Nov 26, 2012 | Discussions thread
Chas Tennis
Contributing MemberPosts: 628
Like?
Re: Write speeds of current SD cards and how they affect recording of videos??
In reply to idreos, Nov 28, 2012

I can't say that I found the answer with this AVS thread but the replies were interesting.

http://www.avsforum.com/t/1404984/sd-cards-where-is-the-speed-bottleneck

In the discussion -

1- An explanation of megabits per sec, abbreviated Gb, and Megabytes per second, abbreviated MB. ‚ÄčInternet usage on this point is not very consistent.

2- I had mixed results using very cheap and supposedly slow 2 & 4 GB SD cards to record very short duration high-speed video (owner's manual says 50 Gb speed required). Only one card failed on recording, by skipping frames. 3-4 cards worked fine for my application.

3 - There is a free program to test SD card speed mentioned in reply #2. I have not tried it.

To be safe you should buy exactly the card specified in the owner's manual. SD cards described as slower might also work for your application but I would test before relying on the card.

There is probably also a speed performance issue regarding file fragmentation, the need to reformat the cards, etc. but I have found no information on fragmentation effects on recording. ?

dpreview thread on the same topic.

http://forums.dpreview.com/forums/post/41185857

Scorrpio discussed the likely use of the camera's buffer for recording.

http://forums.dpreview.com/forums/post/41196068

Chas Tennis

Reply   Reply with quote   Complain
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow