Max recording time at

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Panasonic LUMIX G / GF / GH / GX Series
4K and AVCHD on a Micro Four Thirds system camera with interchangeable lenses.

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Old October 14th, 2017, 03:58 PM   #1
Major Player
Join Date: Dec 2008
Location: NYC
Posts: 259
Max recording time

what would be the max recording times to a 256 GB drive for 4k,30p video at-
1) 8 bit, 420, 100 Mbps, Interframe
2) 10 bit, 420, ? Mbps, Interframe
3) 10 bit, 422, 150 Mbps, Interframe
4) 10 bit, 422, 400 Mbps, ALL- Intra

UPDATE- I just found an article on this subject at

Their answers were for a 64 GB memory card.
1) 85 minutes
2) no answer
3) 56 minutes
4) 21 minutes

Are these numbers correct?

Last edited by Alex Anderson; October 14th, 2017 at 05:30 PM.
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Old October 15th, 2017, 09:33 AM   #2
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Join Date: Mar 2003
Location: Ottawa, Ontario, Canada
Posts: 3,976
Re: Max recording time

I record UHD 60P so 8 bit 4:2:0 at 150Mbps on my GH5 and get around 1hour 50 mins on a 128G card. So you should get more than double that for a 256G at 100Mbps. So those numbers look about right.
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