[FFmpeg-user] dshow 2 mono audio input to 1 stereo right/left output

[Tim Hiles]

On Mon, Oct 19, 2015 at 10:17 AM, Tim Hiles <thiles at confex.com> wrote:

>
>> ffmpeg -i input0 -i input1 -filter_complex
>> "[0:a][1:a]amerge=inputs=2[a]" -map "[a]" output
>> _______________________________________________
>>
>
> I tried this:
>
> c:\ffmpeg\ffmpeg\bin\ffmpeg.exe -f dshow -i audio="Stereo Mix (IDT High
> Definition" -f dshow -i aud
> io="Microphone (IDT High Definition" -filter_complex
> "[0:a][1:a]amerge=inputs=2[a]" -map "[a]" "C:\Test.mp3"
> ffmpeg version N-76123-g002b049 Copyright (c) 2000-2015 the FFmpeg
> developers
>   built with gcc 5.2.0 (GCC)
>   configuration: --enable-gpl --enable-version3 --disable-w32threads
> --enable-avisynth --enable-bzlib --enable-fontconfi
> g --enable-frei0r --enable-gnutls --enable-iconv --enable-libass
> --enable-libbluray --enable-libbs2b --enable-libcaca --
> enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm
> --enable-libilbc --enable-libmodplug --enable-libm
> p3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
> --enable-libopenjpeg --enable-libopus --enable-librtmp --en
> able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora
> --enable-libtwolame --enable-libvidstab --ena
> ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
> --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
> e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma
> --enable-decklink --enable-zlib
>   libavutil      55.  4.100 / 55.  4.100
>   libavcodec     57.  7.100 / 57.  7.100
>   libavformat    57.  8.102 / 57.  8.102
>   libavdevice    57.  0.100 / 57.  0.100
>   libavfilter     6. 11.100 /  6. 11.100
>   libswscale      4.  0.100 /  4.  0.100
>   libswresample   2.  0.100 /  2.  0.100
>   libpostproc    54.  0.100 / 54.  0.100
> Guessed Channel Layout for  Input Stream #0.0 : stereo
> Input #0, dshow, from 'audio=Stereo Mix (IDT High Definition':
>   Duration: N/A, start: 6048.885000, bitrate: 1411 kb/s
>     Stream #0:0: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
> [dshow @ 00ec9640] Could not run graph (sometimes caused by a device
> already in use by other application)
> audio=Microphone (IDT High Definition: Input/output error
>
> I've made sure that none of the devices are in use.  Is this really a
> dshow error or a syntax error on my part?
>

Was still hoping someone might have an answer to help me.