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</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Stuart,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>you are compressing it at 6kbit/s. Then, then SILK mode is probability used and the Silk mode is much faster than CELT. Do you also some figures at 64kbit/s?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It is strange that Opus 1.1 got slower in the Silk mode – may the speech/voice selection adds some overhead. I would be interested in seeing the performance of the 64 kbit/s in both Opus 1.0 and Opus 1.1.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>With best regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> Christian Hoene<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>PS:<br>I also though on using Raspberry PI as a reference platform for testing the speech of Opus on a ARM processor. For measuring the speech of Opus on Intel CPUs, the MARSS86.org simulator might be appropriate.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Von:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> opus-bounces@xiph.org [mailto:opus-bounces@xiph.org] <b>Im Auftrag von </b>Stuart Marsden<br><b>Gesendet:</b> Montag, 16. Dezember 2013 14:03<br><b>An:</b> opus@xiph.org<br><b>Betreff:</b> [opus] 1.1 Much slower on Raspberry Pi<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>I have just started trying Opus with a view to using it in a project. I am interested in embedded hardware and tried it on the Raspberry Pi using the raspbian distro.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The version of libopus in the repos is 0.9.14. I installed this and tried encoding 2 minutes of speech from a librevox recording. It managed this at a respectable pace for complexity 10:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><blockquote style='margin-left:30.0pt;margin-right:0cm'><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Skipping chunk of type "LIST", length 76</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Encoding using libopus 0.9.14 (audio)</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>-----------------------------------------------------</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Input: 44.1kHz 1 channel</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Output: 1 channel (1 uncoupled)</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> 20ms packets, 6kbit/sec VBR</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Preskip: 356</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><o:p> </o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Encoding complete </span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>-----------------------------------------------------</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Encoded: 2 minutes and 0.02 seconds</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Runtime: 50.9 seconds</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> (2.358x realtime)</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Wrote: 111194 bytes, 6001 packets, 123 pages</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Bitrate: 6.78414kbit/s (without overhead)</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Rate range: 2.8kbit/s to 12kbit/s</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> (7 to 30 bytes per packet)</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Overhead: 8.47% (container+metadata)</span><o:p></o:p></p></div></div></blockquote><div><div><p class=MsoNormal><o:p> </o:p></p></div></div><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>And even faster on complexity 0:</span><o:p></o:p></p><div><div><p class=MsoNormal><o:p> </o:p></p></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Skipping chunk of type "LIST", length 76</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Encoding using libopus 0.9.14 (audio)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>-----------------------------------------------------</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Input: 44.1kHz 1 channel</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Output: 1 channel (1 uncoupled)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> 20ms packets, 6kbit/sec VBR</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Preskip: 316</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Encoding complete </span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>-----------------------------------------------------</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Encoded: 2 minutes and 0.02 seconds</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Runtime: 23.72 seconds</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> (5.059x realtime)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Wrote: 106598 bytes, 6001 packets, 123 pages</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Bitrate: 6.47779kbit/s (without overhead)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Rate range: 2.4kbit/s to 13.6kbit/s</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> (6 to 34 bytes per packet)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Overhead: 8.83% (container+metadata)</span><o:p></o:p></p></div></div></div><div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I saw the 1.1 release notes and it said speed improvements on ARM so thought I would try. I downloaded from <a href="http://opus-codec.org">opus-codec.org</a> and compiled directly on the Pi. It has however turned out a lot slower. Complexity 10 barely can encode in realtime:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><blockquote style='margin-left:30.0pt;margin-right:0cm'><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Skipping chunk of type "LIST", length 76</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Encoding using libopus 1.1 (audio)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>-----------------------------------------------------</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Input: 44.1kHz 1 channel</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Output: 1 channel (1 uncoupled)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> 20ms packets, 6kbit/sec VBR</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Preskip: 356</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Encoding complete </span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>-----------------------------------------------------</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Encoded: 2 minutes and 0.02 seconds</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Runtime: 1 minute and 53 seconds</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> (1.062x realtime)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Wrote: 110743 bytes, 6001 packets, 123 pages</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Bitrate: 6.70782kbit/s (without overhead)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Instant rates: 2.8kbit/s to 11.6kbit/s</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> (7 to 29 bytes per packet)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Overhead: 9.13% (container+metadata)</span><o:p></o:p></p></div></div></div></blockquote><div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>And is also much slower at complexity 0:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><blockquote style='margin-left:30.0pt;margin-right:0cm'><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Skipping chunk of type "LIST", length 76</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Notice: Using resampling with complexity<10.</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Opusenc is fastest with 48, 24, 16, 12, or 8kHz input.</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Encoding using libopus 1.1 (audio)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>-----------------------------------------------------</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Input: 44.1kHz 1 channel</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Output: 1 channel (1 uncoupled)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> 20ms packets, 6kbit/sec VBR</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Preskip: 316</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Encoding complete </span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>-----------------------------------------------------</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Encoded: 2 minutes and 0.02 seconds</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Runtime: 36 seconds</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> (3.334x realtime)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Wrote: 106945 bytes, 6001 packets, 123 pages</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Bitrate: 6.45466kbit/s (without overhead)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Instant rates: 2.4kbit/s to 12.8kbit/s</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> (6 to 32 bytes per packet)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Overhead: 9.45% (container+metadata)</span><o:p></o:p></p></div></div></div></blockquote><div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I tried compiling it as fixed point and it is slightly faster but no where near the older version. At complexity 10:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><blockquote style='margin-left:30.0pt;margin-right:0cm'><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Skipping chunk of type "LIST", length 76</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Encoding using libopus 1.1-fixed (audio)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>-----------------------------------------------------</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Input: 44.1kHz 1 channel</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Output: 1 channel (1 uncoupled)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> 20ms packets, 6kbit/sec VBR</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Preskip: 356</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>Encoding complete </span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'>-----------------------------------------------------</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Encoded: 2 minutes and 0.02 seconds</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Runtime: 1 minute and 42 seconds</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> (1.177x realtime)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Wrote: 110686 bytes, 6001 packets, 123 pages</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Bitrate: 6.70402kbit/s (without overhead)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Instant rates: 2.4kbit/s to 11.2kbit/s</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> (6 to 28 bytes per packet)</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-family:"Courier New"'> Overhead: 9.13% (container+metadata)</span><o:p></o:p></p></div></div></div></blockquote><div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I have tried different compiler options but nothing has brought the speed back up. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Any advice on the compiler flags or why I should be seeing such a big speed regression?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Stuart Marsden<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></body></html>