Playing Opus stream causes playback half speed about portaudio

[gordonklaus]

I could hazard a guess that you are receiving mono (single channel) audio and playing it stereo (two channel). But that would only explain half speed, not double.

Try checking the first return value from opusStr.Read to see if it makes sense.

Where do you set the sample rate for the Subsonic client? I only see rate passed to portaudio.OpenDefaultStream.

It's hard to say what the problem is since the code you've given is incomplete. Can you provide more?

[BigB84]

Thanks for fast response :)

Where do you set the sample rate for the Subsonic client? I only see rate passed to portaudio.OpenDefaultStream.

Oh sorry, I'll provide more code I forgot to add consts (I'll update first post code).

Try checking the first return value from opusStr.Read to see if it makes sense.

Could you provide more details, I'm not so experienced yet... Sorry for such question

maybe the problem is in my ffmpeg transcoding command that is called on server every request that this client makes?
ffmpeg -i %s -map 0:0 -b:a %bk -v 0 -c:a libopus -f opus - where %s is source file and %bk is bitrate requested by client
I'm not sure if map is needed, but I haven't been digging into it yet.

[BigB84]

Ok, I'm so sorry, that was my fault...

I was surprised but sample rate changed while transcoding process (I tested and wrote stream to file that is normally passed to portaudio then checked its parameters with os media player).

44100 flac became 48000 opus and as you can see above I pass rate from flac so it makes it play in incorrect speed. (So I heard that is too slow and guessed wrong that is half speed)

Again I'm sorry mess and for taking your time. Thanks for developing this great library :)