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Opus Encoded Log sample

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Yukio Saito
Yukio Saito

This document summarizes the results of encoding an audio file using Opus at different bitrates: 1) The original WAV file was 620KB, 44.1KHz, 16-bit stereo. 2) Encoding was done with Opus at bitrates from 160kbps down to 6kbps. Higher bitrates like 160kbps had higher encoded bitrates around 165kbps while lower bitrates like 6kbps had much lower encoded bitrates around 6kbps. 3) Encoding runtime was less than 1 second for all encodings. File sizes, bitrates, and overhead percentages varied depending on the target encoding bitrate.

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Opus （オーパス）エンコード記録 2012/09/20 Written by Yukio Saitoh / FXFROG.com 標準 VBR ■サンプルファイル?データ ??WAV (PCM-Wave) ファイル作成：44.1KHz / 16bit / Stereo ??620 KB (635,410 バイト) / 無圧縮 引数なし（デフォルト as is） --bitrate 160 --bitrate 64 --bitrate 48 Input 44.1KHz 2 channels → → → 2 channels (2 coupled), Output → → → 20ms packets, 96kbit/sec VBR Preskip 356 → → → Encoding 99.25kbit/s 165.5kbit/s 66.11kbit/s 48.8kbit/s Encoded 3.62 seconds → → → Runtime 1e-006 seconds → → → Wrote 46631 bytes, 181 packets, 6pages 77534 bytes, 181 packets, 6pages 31225 bytes, 181 packets, 6pages 23533 bytes, 181 packets, 6pages Bitrate 101.94kbit/s (w/o overhead) 169.854kbit/s (w/o overhead) 68.0243kbit/s (w/o overhead) 51.0387kbit/s (w/o overhead) 73.6kbit/s to 164.4kbit/s, 123.2kbit/s to 276.4kbit/s, 49.2kbit/s to 108.8kbit/s, 36.8kbit/s to 81.6kbit/s, Rate range (184 to 411 bytes per packet) (308 to 611 bytes per packet) (123 to 272 bytes per packet) (92 to 204 bytes per packet) Overhead 1.08% 0.87% 1.42% 1.86% --bitrate 28 --bitrate 16 --bitrate 8 --bitrate 6 Input 44.1KHz 2 channels → → → 2 channels (2 coupled), Output → → → 20ms packets, 96kbit/sec VBR Preskip 356 → → → Encoding 28.87kbit/s 15.85kbit/s 7.81kbit/s 5.905kbit/s Encoded 3.62 seconds → → → Runtime 1e-006 seconds → → → Wrote 13938 bytes, 181 packets, 6pages 7431 bytes, 181 packets, 6pages 35305 bytes, 181 packets, 6pages 32423 bytes, 181 packets, 6pages Bitrate 29.8343kbit/s (w/o overhead) 15.4541kbit/s (w/o overhead) 6.83315kbit/s (w/o overhead) 6.196697kbit/s (w/o overhead) 21.2kbit/s to 47.2kbit/s, 9.2kbit/s to 22.4kbit/s, 2.8kbit/s to 11.2kbit/s, 2.8kbit/s to 10.8kbit/s, Rate range (53 to 118 bytes per packet) (23 to 56 bytes per packet) (7 to 28 bytes per packet) (7 to 27 bytes per packet) Overhead 3.14% 5.89% 12.42% 13.50% ※すべての環境でこの通りの結果であることを保証するものではありません。

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Opus Encoded Log sample

  • 1. Opus （オーパス）エンコード記録 2012/09/20 Written by Yukio Saitoh / FXFROG.com 標準 VBR ■サンプルファイル?データ ??WAV (PCM-Wave) ファイル作成：44.1KHz / 16bit / Stereo ??620 KB (635,410 バイト) / 無圧縮 引数なし（デフォルト as is） --bitrate 160 --bitrate 64 --bitrate 48 Input 44.1KHz 2 channels → → → 2 channels (2 coupled), Output → → → 20ms packets, 96kbit/sec VBR Preskip 356 → → → Encoding 99.25kbit/s 165.5kbit/s 66.11kbit/s 48.8kbit/s Encoded 3.62 seconds → → → Runtime 1e-006 seconds → → → Wrote 46631 bytes, 181 packets, 6pages 77534 bytes, 181 packets, 6pages 31225 bytes, 181 packets, 6pages 23533 bytes, 181 packets, 6pages Bitrate 101.94kbit/s (w/o overhead) 169.854kbit/s (w/o overhead) 68.0243kbit/s (w/o overhead) 51.0387kbit/s (w/o overhead) 73.6kbit/s to 164.4kbit/s, 123.2kbit/s to 276.4kbit/s, 49.2kbit/s to 108.8kbit/s, 36.8kbit/s to 81.6kbit/s, Rate range (184 to 411 bytes per packet) (308 to 611 bytes per packet) (123 to 272 bytes per packet) (92 to 204 bytes per packet) Overhead 1.08% 0.87% 1.42% 1.86% --bitrate 28 --bitrate 16 --bitrate 8 --bitrate 6 Input 44.1KHz 2 channels → → → 2 channels (2 coupled), Output → → → 20ms packets, 96kbit/sec VBR Preskip 356 → → → Encoding 28.87kbit/s 15.85kbit/s 7.81kbit/s 5.905kbit/s Encoded 3.62 seconds → → → Runtime 1e-006 seconds → → → Wrote 13938 bytes, 181 packets, 6pages 7431 bytes, 181 packets, 6pages 35305 bytes, 181 packets, 6pages 32423 bytes, 181 packets, 6pages Bitrate 29.8343kbit/s (w/o overhead) 15.4541kbit/s (w/o overhead) 6.83315kbit/s (w/o overhead) 6.196697kbit/s (w/o overhead) 21.2kbit/s to 47.2kbit/s, 9.2kbit/s to 22.4kbit/s, 2.8kbit/s to 11.2kbit/s, 2.8kbit/s to 10.8kbit/s, Rate range (53 to 118 bytes per packet) (23 to 56 bytes per packet) (7 to 28 bytes per packet) (7 to 27 bytes per packet) Overhead 3.14% 5.89% 12.42% 13.50% ※すべての環境でこの通りの結果であることを保証するものではありません。