tonydtv Posted February 13, 2015 Share Posted February 13, 2015 Apologies if this is old news, but the "GH4/a7s 4K downscale to 1080p" discussion got a bit too academic for me to follow, so if there has been a conclusion on this, it hasn't been in easily searchable laymen's terms.So. I figured I'd give it a shot.I picked up a 4K scaler off newegg.com for $30 (Coboc HM-SPL-4KUP-1X2 2 Ports 1 in 2 out 4K2K HDMI Scaler splitter, http://www.newegg.com/Product/Product.aspx?Item=N82E16812117500) and borrowed a buddy's Atomos Ninja 2. Did three shots:1) a7s 4K 24p -> Coboc 4K Scaler, downconvert to 1080 24p -> Ninja 2, ProRes 4222) a7s 1080 24p -> Coboc 4k Scaler, set to bypass -> Ninja 2, ProRes 4223) a7s 1080 24p, internal XAVC SThe clip below shows the three shots, then again with the saturation jacked up to 100, then a third time zoomed 200%. To me it seems clear that the 4K downconvert is cleaner and sharper, esp in the shadows. But, if anyone else has any input on what's going on here or if I am missing something or misinterpreting something, please chime in.Like what's up with the red noise in the non-4K shots?I'll be filming more footage this weekend (assuming I can make this setup portable) and will post. Quote Link to comment Share on other sites More sharing options...
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