GH5 is the GH5 in 10 bit internal mode considered High dynamic mode of UHD?

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spikespiegel

Member
Hi guys, was discussing this with a friend and unsure of the appropriate response; is the GH5 in 10 bit internal mode considered High dynamic range UHD? Is it the 10bit rate in 4:2:2 color space that gives UHD resolution footage the high dynamic range? Or is it something higher end like 4:4:4 that is HDR?

Thanks
 
spikespiegel said:
Hi guys, was discussing this with a friend and unsure of the appropriate response; is the GH5 in 10 bit internal mode considered High dynamic range UHD? Is it the 10bit rate in 4:2:2 color space that gives UHD resolution footage the high dynamic range? Or is it something higher end like 4:4:4 that is HDR?

Thanks
Click to expand...

GH5 footage with the exception of V-Log L is Rec.709, e.g. SDR.
V-Log L can be edited for HDR and there is also the future Hybrid Log profile that will have HDR capabilities.
 
Hi Cary, thanks for the details. When you say edited for HDR, can you share what sequence/settings you are using for a NLE like Premiere. Also, if you are windows based, what is the best output for retaining HDR color space?
 
spikespiegel said:
Hi Cary, thanks for the details. When you say edited for HDR, can you share what sequence/settings you are using for a NLE like Premiere. Also, if you are windows based, what is the best output for retaining HDR color space?
Click to expand...
I have not done a project in HDR, I know in Resolve you can set the proper color space and the target nits, use tonal mapping and have the ability to use "expanded" scopes but I do not know the current status for Premiere with respect to HDR because I moved completely to Resolve for both editing and coloring some time ago.

If you want to make your footage future safe for HDR I would record in log format.
 
spikespiegel said:
Hi guys, was discussing this with a friend and unsure of the appropriate response; is the GH5 in 10 bit internal mode considered High dynamic range UHD? Is it the 10bit rate in 4:2:2 color space that gives UHD resolution footage the high dynamic range? Or is it something higher end like 4:4:4 that is HDR?

Thanks
Click to expand...

4:2:0, 4:2:2 and 4:4:4 don't add more range or more colors. They are just different forms of color subsampling. What that means is that some color pixels are thrown out. The theory is that people don't see color resolution as well as they see luminance (black and white values). So in the case of 4:2:0 every other color value is tossed out. The other way to think of it is that 4:2:0 has color channels with pixels that are 2x2 pixels in size. So a 3840x2160 video has a luma channel of 3840x2160 and the chroma channels are 1920x1080 blown up to fit.

So the color sub sampling really has nothing to do with HDR and in fact all HDR broadcasts/streaming are done at 4:2:0. The 4:2:0 is just a form of compression to allow the image to look good with smaller amounts of data. They are not connected at all.
 
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