[HELP] Video have different time and audio desync after conversion

[Dan64]

I'm trying to compress stream capture into smaller size file but have some troubles with it. After conversion from TS AVC to MP4 AV1 video time becomes shorter and at some point it's audio begin to desync. I assume it's because it's in a vaiable frame rate mode, while Hybrid mistakenly assumes that it's in 30 CFR, and i dunno how to change it or enforce vsync (i heard that it helps in such cases)

Hybrid is probably the best tool available to perform video filters and video restoration, but the best usage is with CFR videos that don't have any audio sync problems.
In this case the best option in order to avoid unnecessary complications is to use HandBrake to produce a h264 CFR video with low compression (for example Constant Quality RF = 14).
Then you can feed the (good) encoded video to Hybrid to apply all the filters deemed useful to obtain the final output.