Getting native video file framerate & muting alsasink

[Gottfried Haider]

Hello,

I am working on integrating current GStreamer into Processing
(Java-land). There are two things I am currently struggling with - any
advice would be much appreciated!


Is there a straightforward way to get the native framerate of a
video-file, which is playing via playbin? I found a code snippet
online that looked for a double named "framerate" in the caps, but
this doesn't seem to work for me [1].


Is there a way to change the volume or even completely mute the audio
track that is using alsasink (via playbin)? I natively tried setting
the "volume" or "mute" properties of playbin on the fly, but this
doesn't seem to have an effect [2], whether the pipeline is paused or
not. A limitation of alsasink, or am I doing something wrong?


Cheers
Gottfried

[1] https://github.com/gohai/processing-glvideo/blob/97162f6f59d8d663d0a5d735a833107c89b2aa89/src/native/impl.c#L524
[2] https://github.com/gohai/processing-glvideo/blob/97162f6f59d8d663d0a5d735a833107c89b2aa89/src/native/impl.c#L462