How do I fix out of sync video and audio in my stream copied video?

[Guernsey]

I made a video dump from my emulated game capture that I wanted to trim. The dump itself was an upscaled HD encode from an FFMPEG writer that was a 4x upscale. I wanted to trim the video while preserving the integrity of the encode using the stream copy feature in Virtualdub2. While doing so, I encountered a problem where the audio was out of sync with the stream copied video. It might be due to my setup as I am mostly using a Linux Virtual Machine with Wine on Chrome OS as opposed to a Windows computer.

I might need to buy a Windows machine until then, what can I do to fix this? I do not use the Full Processing feature as I do not know what codecs or settings work with emulated game captures from old game consoles. I also am working with 3D games as well as games that use 2D animations and full motion videos. I do not know what to do and unless I go to my library, I cannot make a stream copy or even a direct stream copy.

[davexnet]

Try Avidemux in Linux; you could always try an Appimage version; no install necessary

[Selur]

Sounds like the source might be vfr and VirtualDub2 might not keep the time stamps during 'stream copy'.
(I don't use VirtualDub2, so I can't say whether this assumption is correct.)

[Guernsey]

Sounds like the source might be vfr and VirtualDub2 might not keep the time stamps during 'stream copy'.
(I don't use VirtualDub2, so I can't say whether this assumption is correct.)

Edit: It looks like you are right. Shotcut had to convert a video I dumped into something that it can use for me to edit it.