CreateFileOutputNodeAsync(IStorageFile, MediaEncodingProfile) almost always fails

Question

When using the AudioGraph in UWP, the final output stage is almost completely useless as specifying any encoding except for WAV and MP3 fails.

See this (very old) SO article for more info:

https://stackoverflow.com/questions/33899541/win10-iot-fileoutputnodeasync-cant-use-mediaencodingprofile

Answer 1

Hello @Jeff Haynes Welcome to Microsoft Q&aA,

CreateFileOutputNodeAsync(IStorageFile, MediaEncodingProfile) almost always fails

During testing with code sample it could work well, I suppose you have not specific input device or pass incorrect MediaEncodingProfile , please check this code sample and create MediaEncodingProfile like the following.

private MediaEncodingProfile CreateMediaEncodingProfile(StorageFile file)  
{  
    switch(file.FileType.ToString().ToLowerInvariant())  
    {  
        case ".wma":  
            return MediaEncodingProfile.CreateWma(AudioEncodingQuality.High);  
        case ".mp3":  
            return MediaEncodingProfile.CreateMp3(AudioEncodingQuality.High);  
        case ".wav":  
            return MediaEncodingProfile.CreateWav(AudioEncodingQuality.High);  
        default:  
            throw new ArgumentException();  
    }  
}  

MediaEncodingProfile fileProfile = CreateMediaEncodingProfile(file);  

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