No Audio in OBS large file

[Kalp0811]

I recorded a 3-hour long gameplay and the size is around 29gb, I did it in mkv format.
When I went back to the recording there is no audio, but the other day when I recorded a 1 hour video it seemed to work fine.
Is there any way I can recover?
I need the audio ASAP
Appreciate for the help

 

[livesupportaid]

i am also facing same issue from 3 days