eYeSkYeYe
Captain
Croatia
Offline
|
24 Mbs = 24 mega bits per second which translated to Mb would be 3 MB/s.
So, if Spark would spend all its processor time on writing to SD Card, theoretically the card with 3MB/s of writing speed would suffice.
However, thing is, Spark has a lot more to do except just writing to SD card.
It has to keep itself stable in the air, listen to commands and react accordingly, shoot the video and encode it etc.... so, my very wild guess is Spark can spend maximum of 1/10th of its processor time writing to SD card so that means card with writing speed of at least 30MB/s is required.
In my experience it's kind of the hit and miss thing. Some cards that are declaratively slower than some other but do better in real life than those "fast" ones. Another thing I've noticed is that cards formatted in PC, using SDAs card formatter for some reason perform better and are more reliable than the ones formatted in Spark. One would think, the ones formatted in device in which they will be used, should perform the best in that device, but that's not the case in my experience.
Furthermore, I prefer more smaller cards than one big one... like 2 x 32Gb is my preferred approach over 1 x 64Gb. If card dies or is lost or whatever you loose half the data, not all of it. Personally, I am using card that is not on the compatibility list and it performs very good... no lost frames, no problems of any kind. Not sure if mentioning the brand and model here would be treated as marketing so will refrain from doing so for now.
Just my 2 cents based on pretty extensive experience with SD cards in all kinds of equipment, not just drones.
|
|