schlotz wrote:
Dave, to make sure I'm reading your sheet correctly. If you shoot with UHSii, compressed raw (like I do with the A9) at 20 FPS one can take approx 123 shots over 6.2 secs before the buffer fills, but at that point it will be another 17.7 secs before the entire buffer gets emptied.
I shoot pro soccer and I'm never on the shutter remotely close to 6.2 secs, more like 2 for an average. So I'm interpreting the above as I most likely will not run into a problem on the field, ie locked up body waiting for a buffer to clear when shooting at 20 fps with UHSii cards in the A1. Maybe correct?
Matt
Correct.
If you shoot short bursts of 6.2 sec or less and average less than 5.2 frames/sec you will never fill the buffer.
This all depends on the assumptions in the calculation being correct.
- UHs-II write rate is 260MB/sec
- no slow down of the write rate while the buffer is filling
- file size is 50.3MB
- the buffer size is correct
- something I haven't though about.
I expect the calculations will be pretty close and over the next few days we may get some better data.
Dave
P.S. Also the body should not be "locked up". We are pretty sure other functions do not need to wait for the buffer to clear, and I believe you can continue shooting at 5.2 frames/sec even while the buffer is clearing.
Feb 03, 2021 at 06:46 PM
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