B4J Question How to read the name of the 'audio channel' corresponding to the PC sound card output?

amorosik said:

I would like to obtain from the code the reading of the name of the audio channel corresponding to the output of the PC sound card
For those interested in PC video and audio recording, see this post
The audio channel name which will then be used in the code described below

B4X:

            Dim par As List
            par.Initialize
            par.Add("-f")
            par.Add("gdigrab")
            par.Add("-framerate")
            par.Add("25")
            If width1>100 And height1>100 Then
                par.Add("-offset_x")
                par.Add(left1.As(String))
                par.Add("-offset_y")
                par.Add(top1.As(String))
                par.Add("-video_size")
                par.Add(width1.As(String) & "x" & height1.As(String))
                'par.Add("-show_region")
                'par.Add("1")
            End If
            par.Add("-i")
            par.Add("desktop")
            par.Add("-f")        'May be dshow
            par.Add("dshow")    'not working at your PC - remove these two lines...
            par.Add("-vcodec")
            par.Add("libx264")
            'par.Add("-movflags")
            'par.Add("empty_moov")

            par.Add("-f")        'add audio source
            par.Add("dshow")
-->>        par.Add("audio=" & quote & "Stereo-Mix" & quote )  'Not sure if at your pc is Stereo-Mix or something different... this always changes from language/region settings

            par.Add("-f")
            par.Add("mp4")
            par.Add(QUOTE & CaptureFolder & "\" & CaptureFileName & QUOTE) 'at pipe... or - ??? hmmm
            arun("ffmpeg.exe",par)

So the question is: how to read, from the B4J code, the name of the audio channel corresponding to the PC's sound card output?

Click to expand...

    Dim MyJO As JavaObject = Me
    MyJO.RunMethod("AudioCardInfo",Array(Null))

    #if JAVA
        import javax.sound.sampled.AudioSystem;
        import javax.sound.sampled.Mixer;

        public void AudioCardInfo(String[] args) {
            Mixer.Info[] mixerInfos = AudioSystem.getMixerInfo();
            int i = 0;
            for (Mixer.Info info : mixerInfos) {
                System.out.println(i + " Name : " + info.getName());
                System.out.println(i + " Description: " + info.getDescription());
                System.out.println(i + " Version: " + info.getVersion());
                System.out.println(i + " Vendor : " + info.getVendor());
                System.out.println("---");
                i++;
            }
        }
    #End If

0 Name : Primair geluidsstuurprogramma
0 Description: Direct Audio Device: DirectSound Playback
0 Version: Unknown Version
0 Vendor : Unknown Vendor
---
1 Name : Speaker (Realtek(R) Audio)
1 Description: Direct Audio Device: DirectSound Playback
1 Version: Unknown Version
1 Vendor : Unknown Vendor
---
2 Name : Primair stuurprogramma voor opnemen van geluid
2 Description: Direct Audio Device: DirectSound Capture
2 Version: Unknown Version
2 Vendor : Unknown Vendor
---
3 Name : Microfoonmatrix (Intel® Smart
3 Description: Direct Audio Device: DirectSound Capture
3 Version: Unknown Version
3 Vendor : Unknown Vendor
---
4 Name : Port Speaker (Realtek(R) Audio)
4 Description: Port Mixer
4 Version: 10.0
4 Vendor : Unknown Vendor
---
5 Name : Port Microfoonmatrix (Intel® Smart
5 Description: Port Mixer
5 Version: 10.0
5 Vendor : Unknown Vendor
---

Click to expand...