Can I match the recording volume to the actual sound volume without using a volume boost filter for the sound?

[iIiLviIirea69]

Hello everyone! I work with ffmpeg and have been trying to find a solution for recording audio from running applications, not just audio from connected devices. Your program allows me to do this. However, during testing, I noticed that it has the same problem as Stereo Mix in Windows: the sound on the recording is much quieter than it actually is, i.e., for some reason, the program does not pick up the sound very well, and you have to listen at maximum volume to hear anything at all. In this regard, I have a question.

1. Is there anything I can do to make the sound on the recording the same as what I hear from my speakers without using a volume adjustment filter?

I also want to ask something else:

2. For some reason, ffmpeg cannot record an application if it is open in full-screen mode (it only captures the cursor while it is on the screen, as well as the first frame of the running application, but the image does not change after that). I have to record in windowed mode, but not all programs have a frameless windowed mode so that I can get a 1920x1080 image. Can your program solve this problem in some way?

3. I noticed that you use “:” in the command for ffmpeg. Is this symbol used to replace the word “and” for the input material for -f dshow, or can it be used somewhere else?

4. In one of the discussions, I noticed that for -vf, a “,” is used, followed immediately by the next filter without a space. Is the comma only used for simple filters, and for complex filters, am I required to use a semicolon?