ultraturtle
lvl.3
United States
Offline
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From the DJI Inspire 1 specs, the max bit rate of video storage is 60 Mb/s. Since 60 Mb/s is equivalent to less than 8 MB/s, I'm pretty sure that is a typo, as 8 MB/s cannot support 1080p, much less 4K even with H.264 compression. The minimum bit rate for H.264 compression of 4K video is 30 MB/s, so it is reasonable to assume that DJI actually meant to specify the max bit rate of video storage as 60 MB/s.
This is significantly higher than the Class 10 rating of 10 MB/s that DJI specifies on their website. My take is that you would be wise to invest in at least a 45 MB/s card like the Sandisk SDSDQXL-064G to ensure you can at least capture 4k video at its most compressed (30 MB/s), but I'm planning to purchase Sandisk SDSDQXP-064G cards once the Inspire 1 ships, because they are the only cards that exceed what I believe to be DJI's maximum bit rate output of 60 MB/s, with the potential for less compression either upon launch, or with future firmware upgrades.
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