Mediaplayer SDK, Avalonia - Unable to play Karaoke CDG & zip files

thanks, I'll add the package and give it a try.

I've looked at that sample, It appears to be for winforms, I'm using Avalonia?

Just added the package, restarted the project and I'm still getting the same errors.

No, the WinForms Karaoke demo worked without issue.

Hi Roman,
Thanks for the demo, It works fine in Windows, however it cannot play Karaoke files running on Linux. I've yet to try it on macOs yet as I haven't had time.

I get the following debug data when trying to play the files:

[MediaBlocksPipeline[MediaPlayerCoreX]][DisposeAsync] Starting async disposal...
[MediaBlocksPipeline[MediaPlayerCoreX]][Dispose] Pipeline graph saved to pipeline_dispose_20260122_122312.dot
[MediaBlocksPipeline[MediaPlayerCoreX]][Dispose] Starting managed resource cleanup...
[MediaBlocksPipeline[MediaPlayerCoreX]][Dispose] Video view cleared.
[MediaBlocksPipeline[MediaPlayerCoreX]][Dispose] Media blocks cleaned up and collections cleared.
[12:23:12 INF] [SafeElementLinker][CleanupManagedCapsFilters] Cleaned up 0 managed capsfilters
[MediaBlocksPipeline[MediaPlayerCoreX]][Dispose] SafeElementLinker capsfilters cleaned up.
[MediaBlocksPipeline[MediaPlayerCoreX]][Dispose] Pipeline NULL state achieved: Null
[MediaBlocksPipeline[MediaPlayerCoreX]][Dispose] Bus disposed after pipeline NULL state.
[MediaBlocksPipeline[MediaPlayerCoreX]][Dispose] Pipeline context disposed.
[MediaBlocksPipeline[MediaPlayerCoreX]][Dispose] Callback delegates cleared.
[MediaBlocksPipeline[MediaPlayerCoreX]][Dispose] Event handlers cleared.
[MediaBlocksPipeline[MediaPlayerCoreX]][Dispose] Managed resource cleanup completed.
[MediaBlocksPipeline[MediaPlayerCoreX]][Dispose] Dispose completed successfully.
[MediaBlocksPipeline[MediaPlayerCoreX]][DisposeAsync] Async disposal completed.
[12:23:12 INF] [MediaPlayerCoreX][CreatePipeline] CreatePipeline
[MediaBlocksPipeline[MediaPlayerCoreX]][Constructor] Creating new MediaBlocksPipeline: MediaPlayerCoreX
[MediaBlocksPipeline[MediaPlayerCoreX]][AddBlock] Successfully added block 'Queue' to pipeline.
[MediaBlocksPipeline[MediaPlayerCoreX]][AddBlock] Successfully added block 'CDGSource' to pipeline.
[MediaBlocksPipeline[MediaPlayerCoreX]][Connect] Successfully connected CDGSource.[CDGSourceBlock] Out Audio to Queue.[QueueBlock] In Auto
[MediaBlocksPipeline[MediaPlayerCoreX]][AddBlock] Successfully added block 'AudioEffects' to pipeline.
[MediaBlocksPipeline[MediaPlayerCoreX]][Connect] Successfully connected Queue.[QueueBlock] Out Auto to AudioEffects.[AudioEffectsBlock] In Audio
[MediaBlocksPipeline[MediaPlayerCoreX]][AddBlock] Successfully added block 'AudioRenderer' to pipeline.
[MediaBlocksPipeline[MediaPlayerCoreX]][Connect] Successfully connected AudioEffects.[AudioEffectsBlock] Out Audio to AudioRenderer.[AudioRendererBlock] In Audio
[MediaBlocksPipeline[MediaPlayerCoreX]][AddBlock] Successfully added block 'Queue' to pipeline.
[MediaBlocksPipeline[MediaPlayerCoreX]][Connect] Successfully connected CDGSource.[CDGSourceBlock] Out Video to Queue.[QueueBlock] In Auto
[MediaBlocksPipeline[MediaPlayerCoreX]][AddBlock] Successfully added block 'OverlayManager' to pipeline.
[MediaBlocksPipeline[MediaPlayerCoreX]][Connect] Successfully connected Queue.[QueueBlock] Out Auto to OverlayManager.[OverlayManagerBlock] In Video
[MediaBlocksPipeline[MediaPlayerCoreX]][AddBlock] Successfully added block 'VideoEffects' to pipeline.
[MediaBlocksPipeline[MediaPlayerCoreX]][Connect] Successfully connected OverlayManager.[OverlayManagerBlock] Out Video to VideoEffects.[VideoEffectsBlock] In Video
[MediaBlocksPipeline[MediaPlayerCoreX]][AddBlock] Successfully added block 'VideoRenderer' to pipeline.
[MediaBlocksPipeline[MediaPlayerCoreX]][Connect] Successfully connected VideoEffects.[VideoEffectsBlock] Out Video to VideoRenderer.[VideoRendererBlock] In Video
[12:23:12 INF] [MediaPlayerCoreX][Play] Using async API.
[MediaBlocksPipeline[MediaPlayerCoreX]][CreatePipeline] Building 8 media blocks...
[12:23:12 ERR] [CDGSource][Init] Unable to create cdgparse.
[12:23:12 ERR] [CDGSourceBlock][Build] Unable to build CDGSourceBlock.
[12:23:12 ERR] [MediaBlocksPipeline[MediaPlayerCoreX]][CreatePipeline] Failed to build block 'CDGSource'.
[12:23:12 ERR] [MediaBlocksPipeline[MediaPlayerCoreX]][Open] Unable to create some pipeline elements.

Alan

I've read and installed everything from the guide before I started...

The "gst-inspect-1.0 --version" command returns:
gst-inspect-1.0 version 1.24.2
GStreamer 1.24.2


attached is a screen grab of the installed packages.

It's Mint 22, so yes.

Thank you, the update is working on Linux now.

Hi Roman,
I have most of what I need working, however I cannot get the audio effects to work and I’ve tried on both Linux and Windows, for example following does nothing:

var effect = new KaraokeAudioEffect();
effect.FilterBand = 220;
effect.FilterWidth = 100;
_player.Audio_Effects_AddOrUpdate(effect);

Also I cannot get the pitch control working for (non-CDG) audio and video, however it works for .cdg files.
I’m using the following to set the pitch on audio & video files:

private PitchShiftAudioEffect _pitch;
.....
_pitch = new PitchShiftAudioEffect(0);

then

..... else if (_cdg == false)
{
var semitones = (int)tbPitch.Value;
_pitch.Pitch = semitones;
_player.Audio_Effects_AddOrUpdate(_pitch);
}

I’m probably doing something wrong and I have one other thing I’m probably going to need some assistance with, however one step at a time!!

Thanks again.

Alan