search for: opus_set_vbr_constraint

...NDWIDTH_NARROWBAND would give similar results to passing an 8Khz sample rate stream, but OPUS_SET_MAX_BANDWIDTH has almost no effect with any settings. My test data has 4Khz bandwidth. I am testing the opus encoder (latest versions) with the following opus_encoder_ctl options: OPUS_SET_VBR=1, OPUS_SET_VBR_CONSTRAINT=unconstrained, OPUS_SET_COMPLEXITY=10, OPUS_APPLICATION_AUDIO, frame=60ms I compress 2 separate audio streams which only differ in the sample rate. One is 8Khz and the other is 16Khz. Both contain identical 4Khz bandwidth audio (the 16Khz file is a properly up-sampled copy of the 8Khz file)...

...ms = (unsigned char)coupled_streams; opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_BITRATE(bitRate)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_BANDWIDTH(OPUS_AUTO)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_VBR(0)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_VBR_CONSTRAINT(0)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_COMPLEXITY(10)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_INBAND_FEC(0)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_FORCE_CHANNELS(OPUS_AUTO)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_DTX(0));...

...encoder as the below (fs is the sampling frequency) enc = opus_encoder_create(fs, chans, OPUS_APPLICATION_AUDIO, &opus_err); opus_encoder_ctl(enc, OPUS_SET_BITRATE(fs * 2)); opus_encoder_ctl(enc, OPUS_SET_BANDWIDTH(OPUS_AUTO)); opus_encoder_ctl(enc, OPUS_SET_VBR(1)); opus_encoder_ctl(enc, OPUS_SET_VBR_CONSTRAINT(0)); opus_encoder_ctl(enc, OPUS_SET_COMPLEXITY(0)); opus_encoder_ctl(enc, OPUS_SET_INBAND_FEC(0)); opus_encoder_ctl(enc, OPUS_SET_FORCE_CHANNELS(OPUS_AUTO)); opus_encoder_ctl(enc, OPUS_SET_DTX(0)); opus_encoder_ctl(enc, OPUS_SET_PACKET_LOSS_PERC(0)); opus_encoder_ctl(enc, OPUS_GET_LOOKAHEAD(...

...ms = (unsigned char)coupled_streams; opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_BITRATE(bitRate)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_BANDWIDTH(OPUS_AUTO)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_VBR(0)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_VBR_CONSTRAINT(0)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_COMPLEXITY(10)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_INBAND_FEC(0)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_FORCE_CHANNELS(OPUS_AUTO)); opus_multistream_encoder_ctl(m_MSEnc, OPUS_SET_DTX(0));...

...OPUS_APPLICATION_VOIP, &i32error); i32error = opus_encoder_init(sOpusEnc, 16000, 1, OPUS_APPLICATION_RESTRICTED_LOWDELAY); opus_encoder_ctl(sOpusEnc, OPUS_SET_BITRATE(16000)); opus_encoder_ctl(sOpusEnc, OPUS_SET_VBR(1)); opus_encoder_ctl(sOpusEnc, OPUS_SET_VBR_CONSTRAINT(0)); opus_encoder_ctl(sOpusEnc, OPUS_SET_COMPLEXITY(0)); opus_encoder_ctl(sOpusEnc, OPUS_SET_INBAND_FEC(0)); opus_encoder_ctl(sOpusEnc, OPUS_SET_FORCE_CHANNELS(1));//Mono opus_encoder_ctl(sOpusEnc, OPUS_SET_PACKET_LOSS_PERC(0)); opus_encoder_ctl(sOpusEnc, OPUS_SET_LSB_DEPTH...

Jean-Marc, Thanks for the response and the helpful info. I am trying to get the library to build without using the pseudostack define, and use either VAR_ARRAYS or ALLOC, but it seems the global stack is not defined. Where do can I define this in my example? VR -----Original Message----- From: Jean-Marc Valin [mailto:jmvalin at jmvalin.ca] Sent: Tuesday, February 20, 2018 5:40 PM To:

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