Info about HEIF 8 or 10 bits depth ?

[SebGo]

Hello, I just joined this forum because I could not find clear answer on the net.

I just bought a A1 in 2nd hand and would like to shoot in HEIF. I'm talking about still pictures only, not movie.

There are 2 options in the menu, either 4.2.0 or 4.2.2

I watched tons of video and nobody seems to agree with the bits depth of this format. Some say both are 10 bits while others pretend only 4.2.2 is 10bits and 4.2.0 only 8 bits.

So ? what your guess about it ? 

From my test I could say both are 10 bits but I would like confirmation

Thanks in advance

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[Pieter]

According to Sony, HEIF 4.2.2 is 10 bit, 4.2.0 is 8 bit:

https://www.sony.com.au/electronics/support/articles/00252090

[SebGo]

ok thanks for your answer. But how could we explain I have a smoother gradient on HEIF than JPEG if they're both 8 bits ? I'm sure the right picture is 4.2.0

[big0bum]

I think color profile in LR is at fault here. I think for JPEG it uses sRGB and sRGB is 8bits afaik, HEIC is rendered using Display P3 so somehow that gradient is smoother because 8bits are displayed on a 10bit profile?

Why don't you just use 4:2:2 and that's it? It's better to have more information from which you can "remove" later in post than not having enough.

[SebGo]

yes I know but I noticed HEIF in 4:2:2 take about 1,5sec to open on my computer, when I can open 4:2:0 nearly in instant..maybe it does not look that much but when u have 1000 or 2000 files to watch and sort it's a difference.

4:2:0 has already a better quality than Jpeg and is lighter too, not sure I need extra color info of the 4:2:2 for postprocessing, except maybe in rare case. Maybe I'll mix both depending on the situation.

Anyway thanks for your infos

[Cameratose]

2 hours ago, SebGo said:

yes I know but I noticed HEIF in 4:2:2 take about 1,5sec to open on my computer, when I can open 4:2:0 nearly in instant..maybe it does not look that much but when u have 1000 or 2000 files to watch and sort it's a difference.

4:2:0 has already a better quality than Jpeg and is lighter too, not sure I need extra color info of the 4:2:2 for postprocessing, except maybe in rare case. Maybe I'll mix both depending on the situation.

Anyway thanks for your infos

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