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Office PC has to record what operators say to clients and contrariwise way - clients to operator. I got low resourse solution. But is there way to combine this two commands?

ffmpeg.exe -f dshow -i audio="Microphone MIC" -threads 2 m1.mp3

and

ffmpeg.exe -f dshow -i audio="Microphone StereoMix" -threads 2 m2.mp3

Also, possible that first source is being recorded to left channel and second one - to right of final output file. Maybe there are some suggestions about additional options too. Thanks.

TarasPro
  • 43

1 Answers1

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Simple mix of inputs, both will sound in all channels

ffmpeg.exe -f dshow -i audio="Microphone MIC" -f dshow -i audio="Microphone StereoMix" -filter_complex "[0][1] amix [a];[a] volume=volume=2 [b]" -map "[b]" -threads 2 m1.mp3

Volume filter is added since amix would render the volume of each input to half.

If you need to split each input to a different channel, you could use join, but if your input sounds are stereo, you should mix them previously into mono to avoid loosing anything.

Assuming mono inputs, result would be first input at left, second at right:

ffmpeg.exe -f dshow -i audio="Microphone MIC" -f dshow -i audio="Microphone StereoMix" -filter_complex "join=inputs=2:channel_layout=stereo:map=0.0-FL|1.0-FR" -threads 2 m2.mp3

Assuming stereo inputs, adjusting volume is not needed since each channel for the same input should be somewhat similar:

ffmpeg.exe -f dshow -i audio="Microphone MIC" -f dshow -i audio="Microphone StereoMix" -filter_complex "[0]channelsplit=channel_layout=stereo[a][b];[1]channelsplit=channel_layout=stereo[c][d];[a][b]amix[e];[c][d]amix[f];[e][f]join=inputs=2:channel_layout=stereo:map=0.0-FL|1.0-FR[g]" -map "[g]" -threads 2 m3.mp3
NuTTyX
  • 2,716