Initializes WMA encoding to the network.

    DWORD freq,
    DWORD chans,
    DWORD flags,
    DWORD bitrate,
    DWORD port,
    DWORD clients


freqThe sample rate, or a BASS channel handle if the BASS_WMA_ENCODE_SOURCE flag is specified.
chansThe number of channels. More than stereo requires WMA Pro or PCM.
flagsA combination of these flags.
BASS_SAMPLE_8BITS8-bit sample data. If neither this or the BASS_SAMPLE_FLOAT flags are specified, then 16-bit data is expected.
BASS_SAMPLE_FLOAT32-bit floating-point sample data.
BASS_WMA_ENCODE_SOURCEUse the BASS channel with the handle in freq as the encoder's source. The chans parameter is ignored, as are the BASS_SAMPLE_8BITS and BASS_SAMPLE_FLOAT flags. If the BASSenc add-on is loaded, then the BASS_CONFIG_ENCODE_PRIORITY setting is used to determine where in the channel's DSP chain the encoding is performed, otherwise priority -1000 is used.
BASS_WMA_ENCODE_STANDARDUse standard WMA encoding. If neither this or the BASS_WMA_ENCODE_PRO flag (nor the BASS_WMA_ENCODE_VOICE or BASS_WMA_ENCODE_PCM flags) is specified then either WMA codec could be used, depending on which supports the requested sample format and bitrate.
BASS_WMA_ENCODE_VOICEUse WMA voice encoding.
BASS_WMA_ENCODE_VOICE_MIXEDUse WMA voice encoding in mixed mode.
BASS_WMA_ENCODE_PCMWrite uncompressed PCM data in an ASF container. bitrate is ignored.
BASS_WMA_ENCODE_24BITEncode in 24-bit, else 16-bit. 24-bit encoding requires WMA Pro or PCM.
BASS_WMA_ENCODE_SCRIPTEnable the specification of tags mid-stream (after encoding has begun).
bitrateThe encoding bitrate.
portThe port number for clients to connect to... 0 = let the system choose a port.
clientsThe maximum number of clients (up to 50) that can be connected.

Return value

If successful, the new encoder's handle is returned, else FALSE is returned. Use BASS_ErrorGetCode to get the error code.

Error codes

BASS_ERROR_WMAThe Windows Media modules (v9 or above) are not installed.
BASS_ERROR_ILLPARAMclients is invalid.
BASS_ERROR_NOTAVAILNo codec could be found to support the requested sample format and bitrate.
BASS_ERROR_UNKNOWNSome other mystery problem!


If you chose to let the system select a port, you can retrieve the port number using BASS_WMA_EncodeGetPort.

The WMA codec expects 16-bit or 24-bit sample data depending on the BASS_WMA_ENCODE_24BIT flag, but BASSWMA will accept 8-bit, 16-bit or floating-point data, and convert it to the appropriate format. Use BASS_WMA_EncodeGetRates to retrieve a list of the encoding bitrates available for a specific sample format. VBR encoding is not recommended for network encoding.

Use BASS_WMA_EncodeSetTag to set tags, BASS_WMA_EncodeWrite to encode sample data, and BASS_WMA_EncodeClose to finish encoding and close the network port. If the BASS_WMA_ENCODE_SOURCE flag is used and the source BASS channel is freed then the encoder will be closed automatically.

The BASS_WMA_ENCODE_QUEUE flag is not necessary with this function as the data is always queued and fed to the encoder asynchronously.


Initialize encoding 44100hz 16-bit stereo sample data at 128kb/s, using a system-chosen port, and allowing up to 5 clients.
HWMENCODE encoder=BASS_WMA_EncodeOpenNetwork(44100, 2, 0, 128000, 0, 5);

See also

BASS_WMA_EncodeClose, BASS_WMA_EncodeGetClients, BASS_WMA_EncodeGetPort, BASS_WMA_EncodeGetRates, BASS_WMA_EncodeOpen, BASS_WMA_EncodeOpenFile, BASS_WMA_EncodeOpenNetworkMulti, BASS_WMA_EncodeOpenPublish, BASS_WMA_EncodeSetTag, BASS_WMA_EncodeWrite