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HDR‑Infused Emoji

(sharpletters.net)
274 points tabletcorry | 8 comments | 17 Apr 25 14:42 UTC | HN request time: 1.326s | source | bottom
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ionwake ◴[17 Apr 25 16:07 UTC] No.43718808[source]▶
Sorry for the noob question but I think finally someone in this thread can answer this for me. Sometimes when I see a youtube short video it looks like its HDR is whacked up by like 500% as per the image in this page, but Im confused how this could be done. Is video processing on the video before it is uploaded somehow giving it some sort of encoding which chrome just wacks up? Or is it the hardware doing it and encoding it a certain way?

I am not talking about a slight brightness increase, I am talking Ill be scrolling youtube and suddenly this video is like a portal into another dimension its so bright.

Can anyone explain how its done?

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detaro ◴[17 Apr 25 16:15 UTC] No.43718922[source]▶
The video is marked as containing a different color space with a higher brightness/color range. That could either be because the initial camera recorded it that way (e.g. iPhones can do that) or because someone took a "normal" video and edited it.
replies(1): >>43719007 #
1. ionwake ◴[17 Apr 25 16:20 UTC] No.43719007[source]▶
Would this be specific software on the iphone used to record a video ? Or a default setting on a certain iphone? I ask because I only very rarely see this whacked up HDR youtube short, like super rarely.
replies(2): >>43719119 #>>43719575 #
2. detaro ◴[17 Apr 25 16:29 UTC] No.43719119[source]▶
Fairly sure a stock iPhone can do it, but you might need to enable it explicitly for compatibility reasons? And depending how you edit or upload the video it could get lost there too, it's still something where support is not really universal.
replies(1): >>43719904 #
3. LoganDark ◴[17 Apr 25 17:05 UTC] No.43719575[source]▶
Does this video look super whacked up to you too? It is HDR: https://www.youtube.com/watch?v=ceSiK-0HX_I
replies(1): >>43719876 #
4. ionwake ◴[17 Apr 25 17:32 UTC] No.43719876[source]▶
Yes it is! But how does one make their video upload HDR? I am familiar with video editing but am unsure how I would perform a test, using a test video with my iphone, and upload it so it doesnt lose its HDR encoding? I believe there is a HDR setting for my phone, but I dont think it will upload by default in a HDR state such as the link you just gave me.

Thanks to everyone trying to help me understand this. I have heard of HDR for years but Ive never witnessed my macbook darken and brighten a video before like 2 months ago.

replies(1): >>43720036 #
5. ionwake ◴[17 Apr 25 17:34 UTC] No.43719904[source]▶
Interesting Im starting to think that perhaps only certain video software on an iphone would allow it - which explains why its so rare?
6. LoganDark ◴[17 Apr 25 17:45 UTC] No.43720036{3}[source]▶
which MacBook do you have?

if you record in HDR, uploading that raw footage to YouTube should produce an HDR video. to get the raw footage, you can either upload the file directly from the phone, or AirDrop it to your Mac from Photos (you should get a .mov), or sync it to iCloud (or connect the phone over USB, maybe) and then use Photos' "File > Export Unmodified Original"

replies(1): >>43720221 #
7. ionwake ◴[17 Apr 25 17:58 UTC] No.43720221{4}[source]▶
I have an M1 macbook, and an iphone 13. Thanks for instructions I think you are right I have to do a specific flow so the HDR isnt lost ie in software like CapnCut I suppose. Thanks again for the help m so glad Ive slowly figured this out with ur help.
replies(1): >>43720486 #
8. LoganDark ◴[17 Apr 25 18:27 UTC] No.43720486{5}[source]▶
yep, plenty of software will export in non-HDR and lose the information. some software (i.e. iMovie, Final Cut Pro, DaVinci Resolve) won't lose the information when configured correctly, but HDR workflow is always a bit different than SDR.