Question / Help Sync issues with Mac

[mrtunes]

First off this is a great piece of software, and all the work that has gone into this is appreciated.
I have been using it to record a Logitech 922 webcam on a Macbook Air (mid-2012), 10.12.6.

I have preferred it to Quicktime's builtin tool because I can quickly start and stop recording, and also the file sizes are much less than what Quicktime is making.

Up until recently with my OBS files, I would have to shift the audio 8 frames to the right in order to make them sync. Last night I recorded, and the video was really choppy, and syncing them up in Premiere looks like well over a full second out of sync. I can't think of any changes to the system that would've caused such a drastic change in behaviour.

Please let me know if you have any ideas for things I can check.

 

[Narcogen]

https://obsproject.com/forum/threads/include-a-log-file-if-you-have-a-problem-heres-how.16571/

Make sure you launch the app, do a recording (or a stream) then stop recording or streaming before uploading the logfile.

 

[mrtunes]

Ah my apologies - here are the log files from the session in question.

 

[Narcogen]

Your GPU seems to be overloaded. Try a lower canvas resolution or scaling output.

21:45:34.913: Output 'simple_file_output': Number of lagged frames due to rendering lag/stalls: 115 (33.1%)
21:46:38.457: Output 'simple_file_output': Number of lagged frames due to rendering lag/stalls: 44 (15.7%)

Also FYI current version is 21.0.3. You're on 19.0.3. Current version should run on Sierra.

 

[mrtunes]

ok thank you. i have updated the application.
in the settings i am going to try some lower resolutions as follows:

 

[Narcogen]

Also suggest bilinear scaling. At least try it and see if it helps without looking too bad.

 

[mrtunes]

ok great. while i have your attention, any suggestions in regards to these encoder settings?

 

[Narcogen]

You can probably drop the audio bitrate down to 160 without much of an issue.

Suggest recording in .flv or .mkv for recoverability in case of error or crash; recorded files can be remuxed to .mp4 if you need it for your editing software right in OBS (File > Remux Recordings).

If what you're doing in editing is delaying the audio by 8 frames, and this is consistent, you can do it directly in OBS.

Go to

Edit > Advanced Audio Properties.

Add a value for "sync offset" to your audio source equal to the delay you need. So if you're recording at 30fps and you need an 8 frame delay, enter 267ms. I think that's right...