Chronos > Software Dev

Faster save by RAM "dump" instead of creating image/movie files?

(1/2) > >>

Rainer:
Hello all,
I don't have a Chronos (yet) but another HighSpeed Cam from PCO. The limiting factor when shooting multiple scenes is the time it takes to save the buffer via USB to disk.
On the forum I read a lot about Chronos saving speeds with different file formats and storage media and I feel that this would affect me heavily when I get a Chronos.

Would the following suggestion increase the saving speed (mainly a questions for the Krontech devs):
Instead of converting the RAW image data from the RAM into h264, DNG, ... do the following: dump the data from the RAM exactly as it is in the RAM (no conversion to any file format).
One would end up with a huge binary dump on the storage medium.
Later - on the computer - one could convert this binary dump into h264, DNG, ...
I have the feeling that the conversion from RAW to an image format is a time consuming step for the FPGA in the Chronos. If this step is "outsourced" to a computer, would it make continuous shooting faster?
It's just an idea, but I would use it right away with every high speed cam I ever used.
Thanks for reading my suggestion, I am really interested if this would be feasible.
Rainer

Nikon1:
There is an option like this on the Chronos, you can save in RAW, which will essentially dump the Entire RAM Data into one massive File, which needs to be processed by the PC later.

Rainer:
Oh, I did not know that. Is it improving the saving speed?

Nikon1:
For RAW its supposed to be Faster than all other Formats. Compressed H.264 Is however still fastest overall from what i know, just because of the way smaller Filesize to write to memory.
 .
 See Page 90 of the User Manual for a Comparison:
 https://www.krontech.ca/wp-content/uploads/2021/09/RE-PDEV-10009-Chronos-User-Manual-Full-Software-Version-0.7.0.pdf
 .
 Saving in RAW Format seems to not be too popular amongst the average user, just because H.264 is overall just a lot faster and Smaller file size, and CinemaDNG is a lot easier to work with and wont need to be converted later, and can be directly imported to most advanced Video Editing Software. Only heard a few people use it where they still want some kind of uncompressed Footage, and Save Speed is absolutely critical.
 I tried Saving in RAW, but stayed with CinemaDNG because it just saves me all the work of converting, which makes it overall still fastest uncompressed Format for me, if i factor in processing time after Shooting, even if it takes a little bit longer to save technically. If i need to move really fast, and i just try to get footage at all and not tickle out the Last bit of Quality, i would use H.264 Anyways, its like a order of magnitude faster.

Rainer:
Thanks for this real-world experience and feedback, Nikon1

Navigation

[0] Message Index

[#] Next page