[FFmpeg-user] ffmpeg writing to an audio device on MacOS

Thilo Borgmann thilo.borgmann at mail.de
Thu May 21 13:24:40 EEST 2020

Am 20.05.20 um 23:18 schrieb Michael Glenn Williams:
> Hi Carl, Thilo

Sorry I just realized my previous mail only went out to Michael instead to the list...

> We might be interested in taking this on. Could you help me to find the
> necessary repos I suppose
> avfoundation and also ffmpeg ?

There is no repo needed for avfoundation, it's an Apple framework delivered with the OS.

>> Am 21.05.20 um 00:04 schrieb Michael Glenn Williams:
>> Have you tried a more modern version of ffmpeg? That one is positively
>> _ancient_. If not, please get the -latest- and try that (start at
>> https://ffmpeg.org/download.html)
> Thank you yes! There doesn't seem to be a build with avfoundation?

Updating FFmpeg will not help you because the avfoundation device has always been input-only for all its existence...

> On Wed, May 20, 2020 at 12:37 PM Carl Eugen Hoyos <ceffmpeg at gmail.com>
> wrote:
>> Am Mi., 20. Mai 2020 um 19:41 Uhr schrieb Michael Glenn Williams
>> <michael.glenn.williams at smartblondeco.com>:
>>> We noticed that if ffnpeg is built with avfoundation, we can read from an
>>> audio device on MacOS, but we cannot write to one.
>> Patch welcome!

... so as Carl Eugen said, this is a feature to be implemented first. If you don't want to try to implement it yourself, you might consider added a feature request / wish ticket on our trac.ffmpeg.org about it, fwiw.


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