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Sony A7s Ii 4K footage - unusably choppy playback - codec or bitrate issue? (Is all 4K footage the same?

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Jim Elliott
Sony A7s Ii 4K footage - unusably choppy playback - codec or bitrate issue? (Is all 4K footage the same?
on Sep 26, 2017 at 8:04:41 am

So trying to edit 4K footage from my A7s II on my late 2016 MacBook is basically impossible - playback is so poor in Premiere. It’s teally not practical and time-efficient to have to make proxies all the time.

My question is - where is the problem? And will all 4K footage be like this?

The choppiness happens regardless of whether the footage is on my MacBook or on my Samsung t5, it’s not a bitrate/drive issue. The codec is 100mbps, xavc-s, 4:2:0, 8-bit so not that ‘big’ but I’ve read it can be CPU intensive?

I guess the real question is - I’m thinking of buying a canon c200, the 4K codec for this is mp4 ... will that be just as terrible? Makes me wonder if I’d be better of just getting a c100 mkii as I can’t be arsed with having to make 4K proxies for everything. Incidentally HD footage from the A7s is fine.


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