Tips to determine endpoint_id?

[thbar]

Thanks for Membrane! I'm trying it out to record iPad audio (which is exposed as an input soundcard when connected over a lightning cable to a Mac) and send it to the default soundcard output, as a starter.

I believe I will need to specify a endpoint_id to the source, because the iPad audio is not the default input.

Do you have an easy way to figure out what the ids are? Thank you!

[mat-hek]

Hi @thbar , you're welcome :) Unfortunately I don't know if there is a universal way of recognizing an assignment of device_id (that endpoint_id maps to in PortAudio) to the particular hardware. Moreover, afaik it can differ e.g. depending on order soundcards are connected... Anyway, you can check out http://portaudio.com/docs/v19-doxydocs/querying_devices.html . BTW, maybe it would be good to make it a mix task.

[thbar]

Thank you! I will work on a PR to expose that as a helper method (& yes a mix task that would display the results is a good idea!).

[mat-hek]

Great! You can check first if this gives you any useful information ;) Also please note we use unifex for the native parts of the framework. If you had any questions we're here to help.

[thbar]

I've seen that and also discovered bundlex, so this will be a great way to have a first hands-on case for their use. Thanks!

[lawik]

So there is currently not any convenience functionality in this module to get a list of devices? It would be nice to have that or have a library for some of those common audio-recording tasks in Elixir. Is this something y'all working with Membrane have and could expose?

[mat-hek]

Hi @lawik, unfortunately, we don't have this functionality, but we're open for PRs ;)

[lawik]

Fair enough. If I end up doing a specific project I might end up needing to do just that :)