[FFmpeg-user] Capture Audio only from an Output Device?

Moritz Barsnick barsnick at gmx.net
Thu May 25 00:37:27 EEST 2017

On Wed, May 24, 2017 at 14:07:50 +0200, Jan Petersen wrote:
> Can I use ffmpeg to capture these outputs and stream it in PCM wave to a
> Linux box for further processing? Or can ffmpeg only capture imputs?

Usually, outputs drivers don't reveal the data they get, and can't
provide it back to the user. I believe I have heard of special drivers
for that, but they perhaps don't always work.

Have you given google a shot? This comes up at the very top and even
mentions a welcome exception for WASAPI:


> There is no WASAPI implementation at all, is that true? Or is there
> something available?

Oh, even better than that google hit above:
The people who provide the "screen-capture-recorder" dshow device
driver also provide a WASAPI loopback driver:


There is also an ffmpeg example in the README, along with tons of other


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