Why does rendering on a PC take 10 seconds compared to 0.25 seconds in-camera?

Started Dec 29, 2012 | Discussions thread
TOF guy
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Re: Why does rendering on a PC take 10 seconds compared to 0.25 seconds in-camera?
In reply to AlephNull, Dec 30, 2012

I think you are missing the point. The camera gets raw data from the sensor, then writes a file to the flash card - in the process it creates that embedded JPEG you have been talking about. The OP has been talking about how quickly the camera creates that embedded JPEG -

Yes that's basically the process.

clearly it takes less than 1/4 second, because the camera can shoot 4 frames / second.

Or the process is slower and the buffer fills up - which is the case. From there it will not keep the 4 FPS as described here . However it should be said that there is another factor at play: the time it takes to write the files to card. Is the camera delayed by the writing, or by the time required to create the JPEG file? Note that the JPEG can be created from the data in the camera buffer while the data are written to memory card. In which case the buffer fill rate is dictated by the slowest of the 2.

Similarly, if you choose to shoot JPEG, then it creates those JPEG files at the same rate. So it has to be able to turn the raw data into JPEGs quite quickly.

It's at least as fast as the buffer full rate is (as indicated in the link above): 3 FPS.

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