Remove dependency on libavdevice

[dimula73]

It seems like the actual usage of avdevice has been removed long ago and replaced with SDL.

[dimula73]

I'm not very sure my understanding is right, but I haven't found any usage of avdevice by MLT internally. I have a feeling that this dependency is a legacy artifact from ~2011.

In Krita we have been building ffmpeg without avdevice and MLT worked fine until the recent dependency policy change in 604972b

[ddennedy]

MLT can use device input through the avformat producer.

[ddennedy]

If you really want something like this, change the build to make it optional instead of removing it. For example, Shotcut supports these input devices through MLT: alsa, pulseaudio, v4l2, dshow, avfoundation.

[dimula73]

Shotcut supports these input devices through MLT: alsa, pulseaudio, v4l2, dshow, avfoundation.

Isn't it a responsibility of the caller to create (and, hence, initialize) avdevice then? I haven't found any other avdevice-related code in MLT.

If you really want something like this, change the build to make it optional instead

I could do that. Is it okay that it would technically revert a part of 604972b ?

[ddennedy]

Isn't it a responsibility of the caller to create (and, hence, initialize) avdevice then?

no

Is it okay that it would technically revert a part

Yes, that is basically what I said or maintain this patch.

[dimula73]

Okay, I'll modify the patch, thanks!

[dimula73]

This MR can now be closed in favor of the new one, that makes avdevice optional: #1246