Latest post Mon, Nov 6 2017 10:36 PM by scocklin. 3 replies.
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  • Sun, Nov 5 2017 10:01 PM

    • mtahir
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    What's it like working with footage from the Sony A7S II?

    Someone might be shooting some footage for me on a Sony A7S II in SLog3, 4K, with the final film being delivered in HD. I looked up the specs of the camera and was a bit surprised - I didn't expect to see 4:2:0, 8-bit in the specs. I know it's the low-light champion but was wondering what it was like to work with the footage.

    The specs show that the A7S II records 4:2:0, 8-bit, at 100Mbits/sec internally whether it's 4K or HD and 4:2:2, 8-bit externally with a 4K recorder. From what I understand XAVC S is supported in MC but not the timecode?

    I own a BMPCC which in ProResHQ shoots HD 4:2:2, 10-bit, ~185Mbits/sec. That's without using RAW. The footage is really easy to handle in MC and Resolve.

    From an editing, colour grading etc. pov, does 4:2:2, 10-bit, footage offer more flexiblity to work with over footage that you convert from 4K (4:2:0, 8-bit) to HD? Is 100Mbits/sec enough at 4K? I appreciate what you're shooting matters.

    I would appreciate your thoughts if you used the camera or edited footage from it.

    Thanks

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  • Mon, Nov 6 2017 7:34 PM In reply to

    • scocklin
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    Re: What's it like working with footage from the Sony A7S II?

    If you have 8.9.1 you can now link and transcode XAVC S footage now in Avid.

    http://community.avid.com/forums/p/181573/848005.aspx#848005

    I did a project last year where the A camera was an F5 and B camera was an A7S, it also was a 2 camera green screen shoot.

    Linking and setting up a multicam was difficult at the time but I managed using Avid Audio Waveform analysis.  Color correction was done in Resolve and I keyed the material in After Effects.  It looked good when I was done but I haven't done it that way since.  The post work was allot harder than using two F5s or FS7s.  

    The budget for that shoot was small and where I saved in the field I lost in post.

    However as I said it should be allot easier now with the newer Avid software.

    My preference would be to use these smaller 8bit cameras for gimblals, drones, car mounts in places where you can't use a larger camera. 

    Good Luck!

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  • Mon, Nov 6 2017 9:58 PM In reply to

    Re: What's it like working with footage from the Sony A7S II?

    You do not wnat to be doing green screen work with a 4:2:0 format!

    And you really do want 10bit over 8bit. 10 bit gives you 4 times the quantisation depth.

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  • Mon, Nov 6 2017 10:36 PM In reply to

    • scocklin
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    Re: What's it like working with footage from the Sony A7S II?

    Actually Pat pulling a key from the A7S footage in After Effects was the least difficult part of the entire workflow.  But I agree it is better to stick with a 4:2:2 color space or even better RAW.  I should have added the setup on the A7S was UHD which eased the pain in Keylight.

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