Get around speed limit SD controller of low-end camera's

Started by zulex, September 08, 2014, 08:18:21 PM

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zulex

Hello Guys,

I try to be short on this one.

Like many of you know the low-end camera's ( like 550D, 600D ) are not able to record 1080p raw due to the speed limit of the SD controller. But I was thinking of some way to get around this. I saw that it's possible to store data directly on the pc by usb cable( maybe android too?). This also isn't fast enough due to the usb 2.0 limitation. But could there be a way to use the SD card and the usb output simustainly? You could think of it like saving frame 1 of the SD and frame 2 on the USB.

It would be really cool if we could capture raw image on 1080p on these relatively cheap camera's, so give your thoughts about this subject and maybe we can make this happen.

And btw, thanks for all the hard work developers!

Zulex

djzigoh

I dont think that it will work... Real world USB transfer speed  it's about 20mb/s  + sd@20mb/s =40ms/s. I don't think that would be suitable for 1080p RAW. That without considering the programming

zulex

@djzigoh thanks for the comment.

If usb is 20mb/s and sd is 20mb/s, then 1080p wouldn't be possible(saying that bandwith is linear with pixels.)

But 720p continous recording would be possible.

960x540 is possible continous. thats 518,400 pixels.
1280x720 is 921,600 pixels. Thats less than 2 times 518,400.

So 720p would be possible in theory.