Shadowplay.

And like i said, on first load up with the file and Vegas, I was able to play everything and edit everything with no issue. This only seems to be after I started cutting up bits n removing things from the timeline n saved to come back later.

Well now it seems to be freezing any time I try to add files to new projects, they're all .mp4 files from shadowplay, and it seems as though they're freezing during the "adding peaks" segment of Vegas. I can't even cancel them, nor can I close it cause it either says it needs to finish or cancel a function first or it outright freezes.

This is...rather annoying :/ 2 days of no issue with my files n editing, and now I can't even use the program.

EDIT - Disabling the viewing of audio peaks allows me to view footage without issue, audio seems to not have a problem, and I was able to do two different trims in the trimmer without issue not to mention exporting as a finished mp4 with no problem.

So I guess at this point my question is...why, after 2 days of hap hazard timeline editing with no issue...are all my clips suddenly crashing Vegas? What options could've caused that? Is there anything I can do/check? Would submitting my error logs/reports help? (I seem to have a folder with quite a few)

Vegas often doesn't get along well with Shadowplay recordings. See my comment on another recent case: https://www.vegascreativesoftware.info/us/forum/vegas-13-loading-peaks-error--110998/#ca686475

I dunno, I had 2 days of 0 issue, I disabled the view audio waveform stuff and I managed to trim a 40 second clip without issue, and now on my second attempt of a clip trim just now it froze again but only when Im trying to jump around between a few points on the timeline to find the right stop to mark and trim off the edges.

And I'm not going to stop using shadowplay because OBS is a streaming tool first, and a recorder second...and it also can't be running 24/7. Shadowplay I can just press a button and voila; footage. I don't have 2 TB of space and 6+ hours a day to be editing footage from my daily play, so with shadowplay I shall stick.

How would one submit feedback to devs to fix that? It's really quite stupid that files that worked previously are now suddenly giving issues, and they're of a file type and codec that Vegas itself uses and if I'm not mistaken even renders out in (Shadowplay is still H.264 if I'm not mistaken, and its in MP4 so...) It's really just...idiotic.

I'll try the compound tricks tomorrow (though I suspect I'll run into the same Desync issues as other users), but failing that, what should I expect with handbrake? Is it essentially just adjusting it slightly so its magically a MP4 that Vegas likes?

You can submit a support request at https://support2.magix.com/customer/en/vegas/form

There won't be any more fixes for VP14. In VP15 H.264 is decoded by a new codec (so4compoundplug) and the development effort is currently on that.

...what should I expect with handbrake? Is it essentially just adjusting it slightly so its magically a MP4 that Vegas likes?

Yes, pretty much. Not ideal, I agree. There's an outside change that a lossless re-wrap (as opposed to transcoding) with FFmpeg might do something to the MP4 container that makes it work better with Vegas, and it would be fast. Info on that is also in section 8 of that link. You could consider transcoding the audio stream to LPCM or another format while doing that, in case that's the issue.

Is audio only transcoding in that link at all or how would I go about doing that?

Truthfully I'm not sure if its the audio, video, or what that's the problem...every time I THINK I find a way to make it work smoothly like it did those first 2 days, it blows up in my face shortly after lol.

Is audio only transcoding in that link at all or how would I go about doing that?

It's not specifically covered there. You'd either have to learn a bit about ffmpeg command line usage, or use an ffmpeg GUI. XMedia Recode seems a good bet and well maintained. However I've just tried to convert the audio to PCM with the following batch file and I can't get it to work:

for %%a in ("*.mp4") do ffmpeg -i "%%a" -c:v copy -c:a pcm_s16le "%%~na-PCM-audio.mp4"

You could try just a straight re-wrap to MP4 without altering the video and audio streams. It's clutching at straws a bit, but it may "clean up" the container/file header and it did just "fix" another old Shadowplay file that I saved:

for %%a in ("*.mp4") do ffmpeg -i "%%a" -vcodec copy -acodec copy "%%~na-fixed.mp4"

Well tested out handbrake...and it didnt SEEM to immediately crash, but then again I tried starting a new project and importing the original file and it was fine too. Eventually, the original file/vegas crashed when I spent a solid 15 seconds constantly hopping up and down the time line....and the handbrake conversion of the file deleted the left audio channel for 4/5 of the footage in the new clip.

I'm honestly at a loss...I have a whole ton of error reports now for VEGAS it seems, don't suppose anyone on these forums could read them if I uploaded them and tell me if/what's at fault?

I honestly see no obvious culprit and I'm getting pissed; I paid for a license that isn't working, and the more I google, the more I find threads of people saying older versions they pirated work more stably than the new versions they've bought :/