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PONAudio MediaFoundationRecorder EncodeToAAC Byte array instead of file
 

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  1. PONAudio MediaFoundationRecorder EncodeToAAC Byte array instead of file
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    <p>What I'm currently doing is while recording I get the bytes from the data received event and encode the bytes with a codec. The codecs I have set up to currently use are ALaw, G722, GSM, etc (like in the <a href="http://naudio.codeplex.com/SourceControl/latest#NAudioDemo/NetworkChatDemo/INetworkChatCodec.cs" rel="nofollow">NetworkChatDemo</a>)</p> <p>The code used to start recording</p> <pre><code> If waveIn Is Nothing Then waveIn = New WaveIn waveIn.DeviceNumber = 0 waveIn.BufferMilliseconds = 100 waveIn.WaveFormat = codec.RecordFormat waveIn.StartRecording() End If </code></pre> <p>The code used to work with the recorded bytes</p> <pre><code>Private Sub OnDataAvailable(ByVal sender As Object, ByVal e As WaveInEventArgs) Handles waveIn.DataAvailable Dim encoded As Byte() = codec.Encode(e.Buffer, 0, e.BytesRecorded) ... //Send encoded audio over UdpClient End Sub </code></pre> <p>This is working well for me but I'd like to add support for the AAC format. So I'd like to achieve the same result as in the above DataReceived event, a byte array of encoded AAC audio which I can send over udp, from <code>MediaFoundationEncoder.EncodeToAac(...)</code> or another class/function I am not aware of within NAudio. As far as I can tell, <code>MediaFoundationEncoder.EncodeToAac(...)</code> only encodes audio to a file and not a byte array. It also doesn't accept a byte array as a parameter. Is there a way to achieve what I want or does NAudio only let me work with an AAC file after it has been fully recorded and saved?</p>
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    1. USJeremy K
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    1. COA lot of this stuff is new in NAudio. The Media Foundation library does appear to allow for stream-based encoding (according to the documentation for `MFCreateSinkWriterFromURL`), so I expect that Mark will build that functionality into NAudio at some stage.
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