Trying to get lossless audio recording with OBS, not working

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cipher86

New Member
Here are my settings:

obssettings.png


My videos seem to be doing variable bit rate for audio though, and never as high as I have set. Sometimes it's 192kbps, sometimes it's 450kbps. I've also noticed when recording my desktop the video bitrate drops to around 3k, how do I get it to always stay at 20k for video and 1411kbps for audio?
 
Harold

Harold

Active Member
Custom ffmpeg output mode and the other settings you're trying for are firmly in "when it breaks you're on your own" territory.
 
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cipher86

New Member
My only other option for decent audio is 320kbps (the max from the dropdown), but then I need to settle with 6000 video bitrate for 1080p60.
 
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cipher86

New Member
Here is the kind of output I get with Type Standard:

obssettings.png

I use mp4 because mkv doesn't let me see file details like this for some reason. That bitrate is high, I could have it lower couldn't I? I thought ~10k was all you need for 1080p60. But yeah audio is capping at 320kbps there. Whereas, with custom ffmpeg settings:
obssettings2.png

Closer to that 20k (can I go lower or should I leave it at 20k? don't know much about video compression yet) and the highest kbps I've seen for audio, but still not as high as I have it set. I guess OBS has a hard cap near what I'm hitting?
 
Harold

Harold

Active Member
cipher86 said:
thought ~10k was all you need for 1080p60
Click to expand...
It is not.

CQP rate control is a quality target based rate control that bases its bitrate selection on resolution, framerate, picture detail, and motion level. It will vary a LOT depending on your content. To maintain the picture quality target you have selected there with what you were recording, you needed over 30,000kbit.

Lower motion and simpler images will need less bitrate.
 
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cipher86

New Member
Okay here are my settings now:
obssettings.png

Even though I have it set to cap at 1411Kbps it is doing 1516 on the test recording. Which is fine. It seems changing the audio to encoder to flac was what was necessary for what I wanted. Only problem now is I have it set to automatically remux to mp4 through advanced settings and it doesn't do this, and when I try to do it manually the resulting file doesn't load. Oh well. At least I have a good video setting now and uncompressed audio.
 
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cipher86

New Member
And I just figured out how to look at file details of an mkv file (open it in MPC then go File --> Properties) so I don't need to convert to mp4 anymore anyway. Hopefully all this can help out other people too.
 
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