No. I just started experiencing this recently, although I've had this issue in the past with other versions before.
I tried to re-convert the file itself, but for some reason that didn't work either. I think it has something to do with Vegas Pro maybe? I should clarify too I converted .MP4 to .MP4, should I try converting the video to another file? 'Cause the audio came with the video. (Minus the sentence mixing, that came from another episode of the same show). What does ID offender do? I don't believe I personally heard of it before.
 

ID = "establish the identity of" (in this case).

Try "Render to new track" in the PCM format (.wav). For multiple tracks, I recall a HOS script to batch this task. You can remove the original embedded audio tracks from the timeline and regroup the PCM track(s) to the video if needed. You should not need to re-render the video. Though this may not be a solution if something else is hindering performance.

Okay! I'll try my best to accomplish that. Is there a way to group audio to video that are both cut separately? I know you can right click on a clip and do remove from, but other than that I'm not too sure. I'll give it a try though!
Okay, hopefully not. Usually when I render anything in Vegas Pro 18.0., some of my stuff comes out lower quality compared to the video imported into the program. I always set it to the right frames and make the quality set to best. Not a huge deal if I have to re-render the video again in .MP4 (this time in Vegas Pro 18.0), but would totally prefer another way. I'll keep you updated on what happens, ty for the suggestion!

You can use a 'muxer' utility to remove or add audio w/o re-rendering video. A proxy file may help as well if the glitches are only present in Vegas preview and rendering is glitch-free. An intermediary file render may help as well. UT and the Magic lossloss codecs are often mentioned by the expert VP users. (which I am not.. at least in the picture realm).

Is there a tutorial that can help expand on what you've said, since this is all new to me? This is my first time learning about this and would love a work around besides re-rendering the whole thing. 'Cause I don't know what you mean by proxy file nor do I understand UT and Magic Lossloss codecs. Are you saying there's a script that can help fix this or something similar? Sorry for the late response, I've just been super busy, but I don't mean to invalidate your time nor help. Sincerely sorry again about that.

HOS (Happy Otter Scripts) has proxy scripts as well as many, many others. There are hundreds of HOS comments on this forum,. search. For muxing I use MeGUI, Avidmux or MP4box. but HOS likely has script for that too.

Okay! Thank you so much, I look forward to trying this out! :D I appreciate your help and feedback a ton, thank you so much.

Do you know which script of HOS is the one I need to help fix my audio issues by chance?

ID = "establish the identity of" (in this case).

What do you mean?

HOS (Happy Otter Scripts) has proxy scripts as well as many, many others. There are hundreds of HOS comments on this forum,. search. For muxing I use MeGUI, Avidmux or MP4box. but HOS likely has script for that too.

Oh, also sorry to answer your question from earlier, yes this is happening to several files. The only ones not infected are ones that were straight downloaded from YouTube.

ID = "establish the identity of" (in this case).

What do you mean?

The comment about which you asked said "ID the offender". It just means you should try and find out "the guilty party".

I think that's what this post was made for though. Thank you for clarifying, I guess?

rraud wrote: ID the offender

@Pupster asked What does ID offender do? I don't believe I personally heard of it before

try to ID the offender and use an alternate.

ID= Identify.
As in: Identify the file that causes the behavior.

Was I suppose to do something specific? 'Cause I have no way of knowing on what causes the behavior, it's why I am here... I sincerely apologize if I'm being dumb.

@Pupster  ... Given that there are audio problems with both timeline playback and renders, another consideration for the cause of the problem could be with the your computer's audio interface. Is the most recent driver for the onboard audio interface installed? Ditto if it is a PCI audio card, but if it is an audio card with the latest driver, try physically removing it from your computer and see if the problem persists with the onboard audio interface.

And on the off-chance that you have a friend or relative with Vegas Pro installed on their computer, perhaps try getting them to test a sample of your media on their computer. If it works well there, then that would suggest that the problem lies with your computer. But if the same glitching result occurs on that other computer, then that would suggest that there is a problem with your media.

I don't know anything about the first paragraph since this is my first time hearing of this so I'll have to do some research on what that is and then get back to you.

The 2nd bit isn't a bad idea, but the only issue is they'd have to download a lot of videos in order to view my project file and I'm not going to make anyone participate in that. It'd be too chaotic and way too much to keep track of since it's a YTP-style video, more than 1 file is in this program. I could definitely try with one small file though if I can convince someone to do it, because tbh I don't have many friends who use Vegas Pro. As I've stated before the only video files that don't work when imported are ones straight from my hard drives. The audio plays just fine when I open those .MP4 files. The only video files whose audio isn't affected are ones straight from YouTube that were downloaded.

@Dexcon I added one of the video files and both the Vegas Pro file if you wanna try it for yourself, because that idea is a very good idea and I am ashamed at myself that I didn't do this earlier, lol.