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I wonder if anybody try to compress a pure sine wave using OPUS codec. When I compressed the mono 1KHz, 16bits 48000 samples per sec. audio stream using the 'opus_demo' utility: opus_demo -e audio 48000 1 2min_1kHz_Sine_16bit_48kHz.wave 2min_1kHz_Sine_16bit_48kHz.opus_raw I had the output stream that is shown below. 00 00 00 01 00 00 00 00 78 00 00 00 01 00 00 00 00 78 00 00 00 01 00

On 02/08/16 10:59 AM, Kolesov, Alexander wrote: > opus_demo -e audio 48000 1 2min_1kHz_Sine_16bit_48kHz.wave > 2min_1kHz_Sine_16bit_48kHz.opus_raw You're missing the "bitrate" argument to opus_demo... Though I'm surprised it didn't complain about it. Jean-Marc