google-chromerecordingsafariscreen-recordingsoundflower
Due to my poor organization I have 2 simultaneous lectures this semester, at this moment I'm following one on Phone and I record the other one with the Mac (Quicktime and Soundflower)
Is it possible to record Chrome or Safari in the background while doing other things on the screen?
And for my specifical purpose, is it possible to direct the audio of an app on the headphones and the audio of another app to a different output (external speaker or Soundflower to record)?
I have a similar need when recording Skype calls. My setup is somewhat different, but the fundamentals should work for your setup. Best of all, you can do it without buying any specialized applications. Rogue Amoeba has a great application called Line In that will allow you to pipe your system's inputs to whatever outputs you are available, including Soundflower.
Go to System Preferences -> Sound:
Start Soundflower.
This will bring up the Audio MIDI setup application. From here, you'll create an "Aggregate Device," which is accomplished by clicking the + icon in the lower-lefthand corner.
Start Line In:
Finally, fire up Audacity, and make sure Soundflower is selected as the input. This should create a chain that ultimately pipes your inputs into Audacity.
I hope this helps, and good luck!
For me sometimes Soundflower (i think is made to just do simple matching of one input to one output) alone just wasn't enough, specially when it comes to audio routing.
Then i use Jack jackosx.com, there i can also do things like route one input to two or even more outputs.
Sometimes i also use a combination of both.
Best Answer
It is not immediately possible to record the windows of Chrome/Safari when they're not displayed on screen, as they really aren't rendered when not needed.
You could possibly make a more involved setup by running a virtualized operating system with Chrome that you can record indepedently on whether it is shown on the monitor or not.
Similarly you could do something like running Chrome under X11 using x11vnc or similar to enable off-screen recording.
There is also the possibility of using Headless Chrome by way of for example the puppeteer-video-recorder plugin to record a video - however I think it would be quite a hassle to get setup.
As for routing the audio as you wish, you should be able to relatively easily set this up by using the Loopback program.