Update to 15.1 Causes Issues to My Sequences Containing MP4s

[AberrantSprk]

My upgrade to 15.1 recently exhibited a bug: .mp4 files are now all distorted, half-tall double-wide with a grey box to the right of the actual clip's visuals.

Hard to describe, I attached some images to illustrate this

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What is the fix to this? I really really don't want to redo my sequences.

[MyerPj]

First thing I would do is delete the cache and see if that helps, close PP then...

• Start PP from it's normal desktop icon (IE: don't open from a project file link).
• Close the Open/Home screen (and you will be in PP without a project open).
• Go into Edit/Preferences/Media Cache (Mac users adjust menu name)
• Then Press: Remove Media Cache Files: and Delete...
• Select: Delete all media cache files from the system and OK
• Close PP - It will create any needed cache files on the fly as you edit.

[AberrantSprk]

Thank you for the suggestion. That did not work... all .mp4 files are now interpreted in that strange erroneous frame format within Premiere.

I am working on a 3840x1200 widescreen monitor, but I've never had issues before... but it looks like Premiere Pro may be trying to do something with the footage that I'm not asking it to do, perhaps?

[MyerPj]

What are your sequence settings and your footage format and frame size.

You can post a screenshot of the sequence settings and use the free MediaInfo program to get info on your clips. Get the program from the link below and using the 'Tree' view post a screenshot of your clip info: https://mediaarea.net/en/MediaInfo/Download

[AberrantSprk]

Sequence Settings:

Footage Properties: ( it was a video capture via ctrl-alt R in Windows 10 )
Type: MPEG Movie
File Size: 65.47 MB
Image Size: 1936 x 1120
Frame Rate: 29.76
Source Audio Format: 48000 Hz - Compressed - Stereo
Project Audio Format: 48000 Hz - 32 bit floating point - Stereo
Total Duration: 00:01:00:22
Pixel Aspect Ratio: 1.0
Alpha: None
Video Codec Type: MP4/MOV H.264 4:2:0
Variable Frame Rate Detected

Before the update, the footage worked fine... now the framing is all weird.

[MyerPj]

You might try a brand new project, bring in one of your clips and drop it on the timeline window. That will create a sequence with matching your clip properties. Your clip is a bit of a strange size, also the framerate doesn't match the sequence settings.

You also have variable framerate footage, which is not great for editing. You might want to use the free Shutter Encoder program to change that footage to constant frame rate.