OBS studio : Captures are shorter than in defined time

[Marshal77]

Hello,

Bumped into this issue last week :

Deciced to make an exception to my normal 30fps OBS RAW capture and tested with 40fps and even 60fps. I set "output timer" to stop after 2 hours, but lo and behold : captured video is not 2hours but roughly 1.5hours or so.

(Following values are not exact, just from my memory to give you rough idea)

1.With 60fps file size was like 240gigs, file explorer reported video duration 2hours, but when playing with VLC, video is like 1h30mins so 2hour video is not captured fully

2.With 40fps file size was like 200gigs, file explorer reported video duration 2hours, but when playing with VLC, video is like 1h40mins so 2hour video is not captured fully

If I remember correctly, I got fed up with the timer and set it to 4hours at some point, but to my suprise, video was again cut short, like 1h40min or so.

What am I missing?