FFMPEG Directshow Multiple Audio Capture

audiodirectshowffmpegwindows

Is it possible to capture multiple audio devices using ffmpeg dshow? I am trying to capture my desktop using gdigrab along with mic and speaker audio using dshow. I have tried using the following command but it doesn't work:

ffmpeg -f dshow -i audio="Stereo Mix (Realtek High Definition Audio)" -f dshow -i audio="Microphone Array (Creative VF0800)" -f gdigrab -framerate 10 -video_size 1920x1080 -draw_mouse 1 -i desktop screen.avi

It only captures audio from the first mentioned audio device. Am I missing some options in the above command?

Best Answer

In this case, you have to expressly map all needed streams, as the auto mapping will only pick up one audio stream. So,

ffmpeg -f dshow -i audio="Stereo Mix (Realtek High Definition Audio)"
       -f dshow -i audio="Microphone Array (Creative VF0800)"
       -f gdigrab -framerate 10 -video_size 1920x1080 -draw_mouse 1 -i desktop
       -map 2 -map 0 -map 1 screen.avi

Related Solutions

FFmpeg streaming: problems with device name

I also get stuck with this problem and find solution, and maybe it would help anyone in future. You just need to open regedit and find "Realtek" (or any other part of device name), one of the results would be like on the screenshot below. Just open "FriendlyName" parameter and rename your device as you wish.

Screenshot:

FFMPEG: commandline options to recording audio from mic and speakers

Finally I found a way to achieve what I wanted, using the PulseAudio utility "pacmd".

This tutorial help me

$ pacmd list-sources|awk '/index:/ {print $0}; /name:/ {print $0}; /device\.description/ {print $0}'

Run above command to get the names of all the system recording interfaces. Sample output given below.

    index: 0
    name: <alsa_output.pci-0000_00_1b.0.analog-stereo.monitor>
        device.description = "Monitor of Built-in Audio Analog Stereo"
  * index: 1
    name: <alsa_input.pci-0000_00_1b.0.analog-stereo>
        device.description = "Built-in Audio Analog Stereo"

Now, run the following command to recording audio from mic and speakers simultaniously.

$ ffmpeg -f pulse -i alsa_output.pci-0000_00_1b.0.analog-stereo.monitor -f pulse -i alsa_input.pci-0000_00_1b.0.analog-stereo -acodec libmp3lame -map 0:0 -map 1:0 outfile.mkv

Best Answer

Related Solutions

FFmpeg streaming: problems with device name

FFMPEG: commandline options to recording audio from mic and speakers

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