search for: opus_set_bandwidth

....10.2019, 14:39 >>> Hi Ulrich, I assume you've been using opusenc to encode the files. If that is the case you can try giving the encoder some more hints about your files: opusenc --speech --set-ctl-int 4008=1103 ... The latter should tell the encoder that the signal bandwidth is 8kHz (OPUS_SET_BANDWIDTH). See opus_defines.h for all valid numbers. You can also experiment with the complexity settings. -Mathias _______________________________________________ opus mailing list opus at xiph.org http://lists.xiph.org/mailman/listinfo/opus

Hi! I have some MP3 audio material which is basically speech with some background noises, essentially > 120Hz and < 5kHz. I had the idea to reduce the file size by recoding the material to Opus at 56kbps. Unfortunately the result is a file sampled at 48kHz much larger than the original. I hope you agree that it does not make sense to create a file larger than the original (MP3). Of course

...; > I assume you've been using opusenc to encode the files. If that is the > case you can try giving the encoder some more hints about your files: > > opusenc --speech --set-ctl-int 4008=1103 ... > > The latter should tell the encoder that the signal bandwidth is 8kHz > (OPUS_SET_BANDWIDTH). See opus_defines.h for all valid numbers. You can > also experiment with the complexity settings. > > -Mathias > > _______________________________________________ > opus mailing list > opus at xiph.org > http://lists.xiph.org/mailman/listinfo/opus

...if (err != OPUS_OK) return; m_SurroundInfo.s.streams = (unsigned char)streams; m_SurroundInfo.s.coupled_streams = (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));...

...ion: latest 1.2.1 (TI: opus 1.1.2) B. KEIL 5.23 (TI: ARM compiler tool chain 5.2.7) C. setup the 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...

Hi, How can I force encoder to create stereo? OPUS_SER_FORCE_CHANNELS only works for mono How can I force encoder to encode at a specific bandwidth? OPUS_SER_BANDWIDTH only works for FB (1105), and the encoder Seems to encode at the input samples rate, no rate conversion is done Thanks, Michal -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi Ulrich, I assume you've been using opusenc to encode the files. If that is the case you can try giving the encoder some more hints about your files: opusenc --speech --set-ctl-int 4008=1103 ... The latter should tell the encoder that the signal bandwidth is 8kHz (OPUS_SET_BANDWIDTH). See opus_defines.h for all valid numbers. You can also experiment with the complexity settings.  -Mathias

...signal analysis (done for >= 8, if I remember correctly) and determine the "best" bit allocation. Now if the noise contained in your signal has some energy in the upper bands, the encoder might try to encode that as well (assuming 48kHz input). In order to avoid that, the codec control OPUS_SET_BANDWIDTH might have been helpful. -Mathias

...khz sampled audio: opus_encoder_ctl(enc,OPUS_SET_MAX_BANDWIDTH(OPUS_BANDWIDTH_WIDEBAND)) opus_encoder_ctl(enc, OPUS_GET_BANDWIDTH(&x)) = 1102 opus_encoder_ctl(enc, OPUS_GET_MAX_BANDWIDTH(&x)) = 1103 average encoded size = 120 bytes if I encode 48khz sampled audio: opus_encoder_ctl(enc, OPUS_SET_BANDWIDTH(OPUS_BANDWIDTH_WIDEBAND)) opus_encoder_ctl(enc, OPUS_GET_BANDWIDTH(&x)) = 1103 opus_encoder_ctl(enc, OPUS_GET_MAX_BANDWIDTH(&x)) = 1103 average encoded size = 280 bytes I do not understand why 48khz encoded data has more bytes even when I am asking it to encode to a smaller frequency rang...

...if (err != OPUS_OK) return; m_SurroundInfo.s.streams = (unsigned char)streams; m_SurroundInfo.s.coupled_streams = (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));...

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