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38mike
Known Participant
July 7, 2022
Question

Full range & Legal Range for video in adobe Premire question

  • July 7, 2022
  • 3 replies
  • 7972 views

On the Atomos Ninja V recorder you can select Legal range or turn it off and get full range signal.

the question is can PR read full Range signal when inporting footage? Full Range on wave form would be 0 to 1095 = in 10bit

Legal range would be 64 to 1000 = in 10bit ( broadcast safe.

I herd from youtube channels that its best to keep video footage in Legal range becuse PR only reads video footage as broadcast safe or legal range.

is this correct?

Please Help! 

3 replies

B
Billionaire Watches
Participant
April 8, 2025

Full Range: Uses the entire 0–255 (RGB) or 0–1023 (YUV) range — best for computer playback.
Legal Range: Uses 16–235 (RGB) or 64–940 (YUV) — standard for broadcast TV.

R
rgr3
Participant
April 8, 2025

To be precise, YUV and RGB use 0-255 (8 bit) and 0-1023 (10 bit) for full range. Limited range is 16-235/240 and 64-940 for RGB and YUV. However, RGB limited range is rare.

R Neil Haugen
R Neil Haugen
Legend
April 10, 2025

You still need to understand what you are reading. Book knowledge alone is not enough.


Your comments are counter to every color scientist, SMPTE color speaker, colorists training and presentations, in other words, every expert I've ever been around, in the technical details.

 

It isn't just looking at a book. If I've not been clear enough, I've been through this in presentations, in many lengthy in person discussions, as a both watcher of and panel participant in online presentations, so I'm basing my comments on the wealth of technical knowledge of the top people in video color in the world.

 

Encoding process is not file content data. Though people often conflate the two.

 

If they actually only encoded 218 levels, as the file data, the file would never be professionally usable. Period 

Everyone's mileage always varies ...
R
rgr2
Inspiring
April 7, 2025

Virtually everything reads both limited and full range. Most current equipment records in full range. Premiere reads full range, but does it quite lamely. Vegas reads without a problem.

R Neil Haugen
R Neil Haugen
Legend
April 7, 2025

"Most current equipment records in full range."

 

Certainly not my experience. Other than the Sony prosumer A7 rigs, and I think some Panny's offer the option also.

 

What gear do you use? I run both a BMPCC4K, and an Ursa Mini Pro 4.6k G2. Neither do ProRes in full. Not even an option. And of the files I get in to work and test from others, I've never had this.

 

Except for some of those running A7s, again. And a couple other cameras. 

 

But even most of the A7 media I've worked with was recorded in legal, as expected.

 

Because again, you do not get one tiny bit more data in a full level encoding ... and most displays still assume YUV Rec.709 to be legal ... so why create the hassle for absolutely no gain?

Everyone's mileage always varies ...
3
38mikeAuthor
Known Participant
April 7, 2025

Neal my post is old

can you delete it. I am no longer asking questions on this post

thanks

R Neil Haugen
R Neil Haugen
Legend
July 7, 2022

SDR video ... standard dynamic range video media, or "Rec.709" ... has standards set for it. And Premiere Pro follows those standards.

 

First, understand that the entire legal/limited 'thing' is about how the data is encoded to the file, not the number of values in the file. A common misconception.

 

YUV (technically Y/CbCr) media, which is nearly every camera out there, is supposed to be encoded as 'limited' or 'legal' range, 16-235. It will be displayed by any properly set monitor as 0-255.

 

RGB media ... typically 12-bit or higher, and most often produced in only very expensive cameras ... is set by standards to be encoded as 0-255, and displayed 0-255.

 

Setting that recorder to 'full' for SDR media doesn't get you any additional values for SDR/Rec.709 clips. It just makes a mess out of using them in an NLE. And maybe on many monitors/screens also.

 

And for most log-encoded and all HDR media, there isn't any limited/legal/full issue to begin with.

 

Neil

Everyone's mileage always varies ...
    3
    38mikeAuthor
    Known Participant
    July 7, 2022

    neal, i should keep my prores HQ 422 10 bit on Legal range? I can set it in the fujifilm camera or the NINJA V-  atomos. i am shooting fuji log

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