Strange Video Playback / Stuttering on PS2 Emulation Footage in Premiere Pro — Any Hardware Tips?

I agree with the responses: variable frame rate (VFR) is to blame. If Premiere were redesigned to work directly with VFR footage, it would have resulted in broken compatibility with CFR footage such that it would try to re-compress CFR footage to VFR, breaking audio sync in the process.

If you must use Shutter Encoder to convert VFR to CFR, don’t just set CFR in the Settings menu; you must also set the frame rate to your desired value and select the frame conversion method (use Drop, not Blend or any other alogarithm) in the advanced settings of the larger window (before you hit the Start Function button). If you only set CFR but ignore the other two, Shutter Encoder will assume that the auto-detected frame rate is your CFR using the default frame conversion method.

The stuttering you're seeing is a classic symptom of Variable Frame Rate (VFR), which is very common in emulator captures as they struggle to maintain perfectly consistent frame timings. Premiere Pro's timeline engine is built for constant frame rates, so when it encounters VFR, it often drops frames or desyncs during playback. To fix this, you should transcode your clips to a Constant Frame Rate (CFR) format like ProRes before importing. This allows you to Play Game footage on a long timeline without the overhead of the CPU constantly trying to realign the frames.

Things that help when it comes to having longer timelines:

• Use a mezzanine / Smart Rendering format
• More RAM

Try transcoding a few clips to ProRes 422 LT.  If you’re very tight on disk space, use ProRes 422 Proxy.

ProRes 422 LT is the default for Sequence Video Previews and has a very high likelihood of playing smoothly on most computers at standard frame sizes and frame rates.  It’s also what’s called a mezzanine CODEC (a compression type specifically meant for video editing).  The file size tends to be larger, but that’s part of why it performs better.

You can transcode in Media Encoder or Shutter Encoder (donation-ware).

If that works well, consider transcoding all of your gameplay recordings.

>codec setting issue

Could be… but you don’t describe your video

Copied from Jeff Bellune
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One of the most important lessons a video editor can learn is the difference between a codec and a file format.
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A codec determines how the video is stored digitally. All codecs compress video into smaller file sizes to store it.
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They have to discard some of the video information to do that. This compression starts in the camera or software that first captures the video.
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The best quality codecs are "lossless" because when their files are played back, the video is virtually indistinguishable from the original. The drawback is their file sizes are quite large. ProRes 4444 is an example. So is Cineform.
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The most efficient codecs are ones like H.264. They throw away enough video information to make relatively small file sizes, but when they are decompressed and played back, the quality of the video is so close to the original that it appears no different to the eye. That involves a lot of number-crunching. The biggest drawback to high-efficiency codecs is the massive amount of computing power required to decompress the video on the fly for playback and editing.
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Those compressed videos have to be stored in a container that computers can recognize. That's where file format comes in. Just like this sentence  I'm writing could be copied and pasted into a Word document, it could also be pasted into a simple text editor. Now, Word can read a .txt file, but Notepad can't read a .doc file. They serve different purposes. Yet the actual words I used in the sentence are exactly the same in both. The .doc file and .txt file are only containers (or wrappers) for my words.
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The equivalent situation in video are the various file formats we all know: AVI, MOV, MP4, MXF, etc. They can all contain video in a variety of codecs, but they were designed for different purposes. It's not the file format that determines quality. It's the codec inside the wrapper.

Exactly what is INSIDE the video you are editing?
Report back with the codec details of your file, use the program below
Free program to get file information for PC/Mac http://mediaarea.net/en/MediaInfo/Download
- a MediaInfo tutorial https://youtu.be/Ivy9ckSX1M0
- when you analyze your file in MediaInfo and post a screen shot in the forum, do so in TREE view
- post your information IN your message, not as an attachment that someone would have to download
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Does your video use a Variable Frame Rate?
If yes, use https://handbrake.fr/ open source transcoder/converter to convert to Constant Frame Rate
Handbrake tutorial https://www.youtube.com/watch?v=xlvxgVREX-Y&t=34s