They are designed for video use. That's why they have names like cine and it709 which are video media standards. I would highly recommend you to just stick with the normal settings if you ain't sure. Sharpness isn't bad, it's just better to do sharpening in post processing.
There are so many video format combinations on the Sony A7 IV and i I look through and explain all of the Sony A7 IV video settings in this easy A7 IV guide.
In this demo, I show how to set up the Sony a7S II for shooting cinema, movies, or video.0:00 – Intro0:30 – Camera on and Movie Mode1:27 – Factory settings,
This is a high-quality setting with 4K XAVC S-I in 10-bit 4:2:2. It also has Active SteadyShot on for super smooth capture. Then he does use the S-Log3 picture profile with S-Gamut3.cine. It’s great. Three is 100 fps XAVC S 4K 10-bit 4:2:2. No Intra here so that it works with regular SD cards.
Sony A7 III, A7R III, A9 Sports Photography: Additional Settings Viewfinder Frame Rate. Camera Settings 2 / Display Auto Review 1 (page 6/9) Not available on the A7 I, A7 II series, and the A7 III. Select Sony cameras offer the possibility to increase the frame rate of the finder from Standard (50 or 60fps) to High (100 or 120fps). This is
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sony a7 best video settings