Premiere Pro ARRIRAW OpenGate wrong resolution

[Bedelian.film]

Hello everyone! I shot a short film on Alexa Mini in ARRIRAW OpenGate with cineovision anamorphic lenses. I edited in Premiere, but when I brought the footage in, the resolution was wrong. ARRIRAW OpenGate on the Alexa Mini is supposed to be 3424 x 2202, but Premiere showed my footage as 2560x1072. For a while, I thought we just had the wrong camera settings, until I brought the footage into Resolve to color, and it actually shows the correct resolution. 

What's more, the aspect ratio in Premiere was wonky. Instead of showing it at a 2:1 squeeze, or desqueezed, it shows it somewhere in between, and it is saying the pixel aspect ratio is 1.0. I figured out that in order to get the correct aspect ratio, I needed to multiply the width by 1.29, really bizzare intepretation. I applied that as a transform effect to all the source video files to make my life easier. 

I know what the workaround is, transcode in Davinci, edit using those files, then switch back to raws and master in Davinci, but I want to know why this happened. I'm an AE so I like to be able to solve any problem in Premiere, and I generally like to work all within Premiere if I can. Is there a setting in Premiere to interpret ARRIRAW OpenGate correctly? 

Here is what Premiere shows me about the footage when I click properties:

File Path: REDACTED\A010C2IJ\A010C004_130101_C2IJ.mxf
Type: MXF
File Size: 16.51 GB
Image Size: 2560 x 1072
Frame Rate: 23.976
Total Duration: 00:01:05:07
Pixel Aspect Ratio: 1.0
Alpha: None

MXF File details:
Wrapper type: MXF OP1a (type: SingleItem SinglePackage MultiTrack Stream Internal)
File generated by: ARRI, ALEXA Mini (SUP 5.02.17)
ARRIRAW

QuickTime Details:
Movie contains 1 video track(s), 0 audio track(s), 0 closed caption track(s), and 1 timecode track(s).

Video:
There are 1567 frames with a duration of 1001/24000ths.

Video track 1:
Duration is 0:01:05:08
Average frame rate is 23.98 fps

Video track 1 contains 1 type(s) of video data:

Video data block #1:
Frame Size = 2560 x 1072
Compressor = Apple ProRes 422 Proxy
Quality = Most (5.00)

Timecode:
Timecode track 1 contains 1 type(s) of data:

Timecode data block #1:
Start Time = 02:49:20:00
Reel name =

Here is how the footage looks when I bring it into Premiere 

Here is what the footage looks like after I apply a 1.29 desqueeze on it (I figured out the correct desqueeze by grabbing a still from Resolve, which had the correct interpretation)

[Sumeet Kumar Choubey]

Hi Bedelian.film,

We're sorry about the poor experience. Would you mind sharing a download link for a sample media? It will help us to diagnose the issue properly at our end. Also, let us know the version of Premiere Pro that you are using.

Thanks,

Sumeet

[Bedelian.film]

Thank you, can I send it to you privately?  I'll check what version I have when I get home later. 

[R Neil Haugen]

Click on Sumeet's name in the 'header' over his post. That will take you to his User Profile, and you can then 'message' him, which is a private conversation.

Neil

[Bedelian.film]

Thank you, Sumeet and Neil,

Sumeet, I am sending you a download link in a private message. The version of Premiere I have installed is 22.4, though I was working on this project in a previous version of Premiere and the same thing happened. I also tried opening the file in 15.4.5, which is the other version I have installed on my computer and the same issue occured. 

-Vahan