Replay buffer does not respect maximum time setting, saves files much longer/larger than intended

Operating System Info

Other

Other OS

Arch Linux

OBS Studio Version

30.0.0

OBS Studio Version (Other)

30.0.0

OBS Studio Log URL

https://obsproject.com/logs/b3YBDkUJ7gyoovOa

OBS Studio Crash Log URL

No response

Expected Behavior

When my replay buffer is set to a maximum of 120 seconds and 8192MB memory usage, I expect it to output files with a length of ≤120 seconds (± a few seconds due to keyframes and other variables).

For context, given my other recording settings, this typically works out to around ~2.5GB file sizes for saved replay buffer segments.

Current Behavior

Saving the replay buffer creates a file that instead goes back to the moment OBS was launched, rather than respecting the maximum length setting.

As an example: I currently have a recording from replay buffer that is over 26 minutes long, and approximately 9GB. As you might expect, the quality is severely degraded (to say the least), and it takes much longer than normal to actually save + write to disk.

Steps to Reproduce

1. Launch OBS
2. Wait for an amount of time greater than specified in the "Maximum Replay Time" setting
3. Save the replay buffer and observe the file produced

Anything else we should know?

• Rolling back to the previous version in the Arch repositories (28.x.x) resolves the issue
• Manually stopping/starting the replay buffer seems to reset it, however the next saved segment will begin at the moment the buffer was restarted (ie, still not respecting the maximum time value).
• Changing the "Maximum Replay Time" value does not work
• Whether or not you are actively recording has no effect
• Disabling plugins or changing other video settings does not appear to have an effect

Start by reproducing the issue in OBS Studio 30.0.0 with Maximum Replay Time set to 120 seconds, following the listed steps, and compare the result with the 28.x version. Trace the replay buffer handling responsible for the saved segment length. Done means saved files remain within the configured maximum time instead of extending back to launch.