The VideoLAN Forums

Dear friends,

I have 2 questions regarding LIBVLC audio manipulations:

1. When I set a "play" callback for the audio, there is no sound. This occurs even if the "play" callback function is empty. Following is my code:
//Set callback:
libvlc_audio_set_callbacks(mpSourceMedia, (libvlc_audio_play_cb)&playMediaAudio, NULL, NULL, NULL, NULL, &contextSourceMedia);
//Play callback:
void playMediaAudio(void *data, void *samples, unsigned count, int64_t pts)
{
}

2. When I use VIRTUAL audio device and rout the audio source to it, the volume control does not work (the virtual audio device HAS volume control) and stays at 100.
I route the audio using the following code:
err = libvlc_audio_output_set(mpSourceMedia, audioDevices[SHARED_CABLE].container_name);
libvlc_audio_output_device_set(mpSourceMedia, audioDevices[SHARED_CABLE].container_name, audioDevices[SHARED_CABLE].device_name);
And set the volume using the following code:
err = libvlc_audio_set_volume( mpSourceMedia, 0 );
Windows handles this device correctly.


Your kind help is greatly appreciated!

Thanks,
Avi.

Obviously if your play callback does not actually play the samples, there will be no sound to hear...

Dear Remi,

Thanks allot for your reply!

Do you have a sample function that actually plays the sound?

Thanks,

Avi.

No. The callback prototype is explained in the Doxygen documentation.