Footage from Canon E70 has a gamma shift in Premiere (on PC only)

[PhilSchmulian]

Hi, 

Whenever I bring footage from the Canon E70 (.MXF files), there is a noticeable gamma shift in Premiere, but only on my PC. It looks fine on VLC and MPC, and also on Premiere on Mac (I've tested the same files on Mac, no issue).

The issue is ONLY in Premiere, and ONLY on PC (I haven't been able to test on another Windows PC, just my own). 

This is how it's supposed to look (and how it looks in VLC and Premiere Mac): 

And this is how it looks in my Premiere for Windows: 

And when I export said footage directly through Premiere, I still get this gamma shift, but if I use the same settings, but export through Media Encoder, it looks normal (aka without the gamma shift).

I've messed around with the settings and just can't figure it out! Help me please!

I'm running Premiere Pro 24.5 on Windows 11 and my GPU is GeForce RTX 3070 (my NVidia Studio driver is always updated).

[Ann Bens]

Please read these docs:

Tone mapping in Premiere Pro

Color management in Premiere Pro

[PhilSchmulian]

Thanks @Ann Bens, but that's not it. 

If I enable Auto Tone Mapping, it just automatically applies a Rec709 LUT to the footage (or at least that's what it looks like). I want it to still look LOG, but with the correct gamma, not this unusually high gamma. 

If I uncheck "Display Color Management" in the Lumetri settings (it's already checked by default), it just makes the gamma even higher! 

[Ann Bens]

@R Neil Haugen 

[R Neil Haugen]

First, lose the idea that everything is a LUT, ok? They actually use algorthms for most transforms now, vastly superior and capable math based processes.

Second, is that footage file set to full or video range? You can check in the free utility app MediaInfo ... drag/drop the file onto that utility's desktop icon, then go into "Tree View" and it will show in the data.

Probably drag/drop the image onto the test area of the reply box so we know exactly all the details of the clip.

Next ... with most media these days, due to the new color management available in Premiere, I would suggest ...

• Display color management ON
• auto detect log ON
• auto tonemapping ON
• sequence still set to Rec.709
• use ONLY presets without HLG or PQ in the preset name.

[Kevin-Monahan]

Hi @PhilSchmulian,

Can the team get more info? See, How do I write a bug report? @Sumeet Choudhury might be able to assist.

Thanks,
Kevin