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markbatey

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    markbatey got a reaction from Rungunshoot in Discovery: 4K 8bit 4:2:0 on the Panasonic GH4 converts to 1080p 10bit 4:4:4   
    I’m really interested in whether shooting 4k for HD output actually gives more colour information that shooting HD in the first place. There’s been lots of mathematical theorising about this, some of which I kind of understand, lots of which I don’t. 
     
    So to get a real world answer, I just pointed the GH4 at the sky, and this is what happened.
     

     
    First off, 100Mbps at 25p. Then the same shot a few seconds later, no changes other than to switch to 4k. Then import to FCPX, optimizing footage to ProRes. Drop both shots onto a 1080p timeline. Add a Hue/Saturation filter, crank up the Saturation to 2.0. Export as 1080p.
     
    Obviously nobody would actually add that much saturation in real life, but it exaggerates the colours in a grey Newcastle sky.
     
    I think the difference really stands out.
     
    Settings: Cinelike V tweaked to Mr AR’s recommendations, cloudy WB, shutter speed 1/50, iso 200, f3.5. Not sure what the colour balance difference is due to - I changed nothing on the camera between shots other than changing between HD and 4k.
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    markbatey got a reaction from abmbarry in The EOSHD Panasonic GH4 Shooter's Guide - Now Available   
    Andrew - Just a query about your advice on audio levels (page 71-71) in the excellent and very useful book. You say that the "mic level limiter" is in fact an automatic audio gain control, and that with it switched on the mic level adjust does not work. On my GH4 it appears that the limiter is a normal limiter, reducing the level only when it starts to clip at high levels. Also, the mic level adjust works with the limiter switched in. So I'm finding that the traditional way of setting levels works well - turn the limiter off, set the level so that it never hits the red, then turn it back on, just to catch any unexpected peaks in audio. I can't find an option to use fully auto audio levels in my camera - which actually might be nice under some (but not many) circumstances.
     
    Or have I misunderstood something here?
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    markbatey got a reaction from Andrew Reid in GH4 bitrate - I can't see the difference   
    Actually I think it's my firewire drives I'll need to upgrade before the laptop... 
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