<div dir="ltr">Christian,<div><br></div><div>I will give 64kbit/s a try and post the figures. My own project is voice only and requires low bitrate so was hoping that it was just the way I was compiling and not an actual regression in speed for SILK. The raspberry PI is quite a cheap and handy reference platform though the ARM side is fairly underpowered but has a great GPU. It also has no audio in which is a pain for playing with codecs but it does support USB soundcards. I was wondering if a microcontroller like the Cortex-M range might be able to encode and that seemed possible extrapolating from the Pi results but this speed regression if it is real would kill that hope.</div>
<div><br></div><div>I should also probably try and compile the same version from the Raspbian repos myself and if I also see a big slowdown then it is something wrong with the way I am compiling. I am not a deb expert but it seemed like the only optimisation they were using was -O2 but perhaps there is something else set. Do not want to claim a regression when it may be my own fault. </div>
<div><br></div><div>Thanks for your response.</div><div><br></div><div class="gmail_extra"><br clear="all"><div><div>Best Regards,</div><div><br></div><div>Stuart Marsden</div><div><br></div></div><br><div class="gmail_quote">
On 17 December 2013 11:04, Christian Hoene <span dir="ltr"><<a href="mailto:christian.hoene@symonics.com" target="_blank" onclick="window.open('https://mail.google.com/mail/?view=cm&tf=1&to=christian.hoene@symonics.com&cc=&bcc=&su=&body=','_blank');return false;">christian.hoene@symonics.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="DE" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hi Stuart,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></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?<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></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.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">With best regards,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> Christian Hoene<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></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.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></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""> <a href="mailto:opus-bounces@xiph.org" target="_blank" onclick="window.open('https://mail.google.com/mail/?view=cm&tf=1&to=opus-bounces@xiph.org&cc=&bcc=&su=&body=','_blank');return false;">opus-bounces@xiph.org</a> [mailto:<a href="mailto:opus-bounces@xiph.org" target="_blank" onclick="window.open('https://mail.google.com/mail/?view=cm&tf=1&to=opus-bounces@xiph.org&cc=&bcc=&su=&body=','_blank');return false;">opus-bounces@xiph.org</a>] <b>Im Auftrag von </b>Stuart Marsden<br>
<b>Gesendet:</b> Montag, 16. Dezember 2013 14:03<br><b>An:</b> <a href="mailto:opus@xiph.org" target="_blank" onclick="window.open('https://mail.google.com/mail/?view=cm&tf=1&to=opus@xiph.org&cc=&bcc=&su=&body=','_blank');return false;">opus@xiph.org</a><br>
<b>Betreff:</b> [opus] 1.1 Much slower on Raspberry Pi<u></u><u></u></span></p><div><div class="h5"><p class="MsoNormal"><u></u> <u></u></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.<u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></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:<u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></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><u></u><u></u></p>
</div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">Encoding using libopus 0.9.14 (audio)</span><u></u><u></u></p></div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">-----------------------------------------------------</span><u></u><u></u></p>
</div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Input: 44.1kHz 1 channel</span><u></u><u></u></p></div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Output: 1 channel (1 uncoupled)</span><u></u><u></u></p>
</div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> 20ms packets, 6kbit/sec VBR</span><u></u><u></u></p></div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Preskip: 356</span><u></u><u></u></p>
</div></div><div><div><p class="MsoNormal"><u></u> <u></u></p></div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">Encoding complete </span><u></u><u></u></p>
</div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">-----------------------------------------------------</span><u></u><u></u></p></div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Encoded: 2 minutes and 0.02 seconds</span><u></u><u></u></p>
</div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Runtime: 50.9 seconds</span><u></u><u></u></p></div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> (2.358x realtime)</span><u></u><u></u></p>
</div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Wrote: 111194 bytes, 6001 packets, 123 pages</span><u></u><u></u></p></div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Bitrate: 6.78414kbit/s (without overhead)</span><u></u><u></u></p>
</div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Rate range: 2.8kbit/s to 12kbit/s</span><u></u><u></u></p></div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> (7 to 30 bytes per packet)</span><u></u><u></u></p>
</div></div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Overhead: 8.47% (container+metadata)</span><u></u><u></u></p></div></div></blockquote><div><div><p class="MsoNormal"><u></u> <u></u></p>
</div></div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">And even faster on complexity 0:</span><u></u><u></u></p><div><div><p class="MsoNormal"><u></u> <u></u></p></div></div><div>
<div><div><p class="MsoNormal"><span style="font-family:"Courier New"">Skipping chunk of type "LIST", length 76</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">Encoding using libopus 0.9.14 (audio)</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">-----------------------------------------------------</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal">
<span style="font-family:"Courier New""> Input: 44.1kHz 1 channel</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Output: 1 channel (1 uncoupled)</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> 20ms packets, 6kbit/sec VBR</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Preskip: 316</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><u></u> <u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">Encoding complete </span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">-----------------------------------------------------</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal">
<span style="font-family:"Courier New""> Encoded: 2 minutes and 0.02 seconds</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Runtime: 23.72 seconds</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> (5.059x realtime)</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Wrote: 106598 bytes, 6001 packets, 123 pages</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Bitrate: 6.47779kbit/s (without overhead)</span><u></u><u></u></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><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> (6 to 34 bytes per packet)</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Overhead: 8.83% (container+metadata)</span><u></u><u></u></p></div></div></div><div><div><p class="MsoNormal"><u></u> <u></u></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" target="_blank">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:<u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></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><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">Encoding using libopus 1.1 (audio)</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">-----------------------------------------------------</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Input: 44.1kHz 1 channel</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Output: 1 channel (1 uncoupled)</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> 20ms packets, 6kbit/sec VBR</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Preskip: 356</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><u></u> <u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">Encoding complete </span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">-----------------------------------------------------</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal">
<span style="font-family:"Courier New""> Encoded: 2 minutes and 0.02 seconds</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Runtime: 1 minute and 53 seconds</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> (1.062x realtime)</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Wrote: 110743 bytes, 6001 packets, 123 pages</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Bitrate: 6.70782kbit/s (without overhead)</span><u></u><u></u></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><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> (7 to 29 bytes per packet)</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Overhead: 9.13% (container+metadata)</span><u></u><u></u></p></div></div></div></blockquote><div><div><p class="MsoNormal">
<u></u> <u></u></p></div><div><p class="MsoNormal">And is also much slower at complexity 0:<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></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><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">Notice: Using resampling with complexity<10.</span><u></u><u></u></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><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal">
<u></u> <u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">Encoding using libopus 1.1 (audio)</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal">
<span style="font-family:"Courier New"">-----------------------------------------------------</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Input: 44.1kHz 1 channel</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Output: 1 channel (1 uncoupled)</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> 20ms packets, 6kbit/sec VBR</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Preskip: 316</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><u></u> <u></u></p></div>
</div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">Encoding complete </span><u></u><u></u></p></div></div>
</div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">-----------------------------------------------------</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal">
<span style="font-family:"Courier New""> Encoded: 2 minutes and 0.02 seconds</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Runtime: 36 seconds</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> (3.334x realtime)</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Wrote: 106945 bytes, 6001 packets, 123 pages</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Bitrate: 6.45466kbit/s (without overhead)</span><u></u><u></u></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><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> (6 to 32 bytes per packet)</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Overhead: 9.45% (container+metadata)</span><u></u><u></u></p></div></div></div></blockquote><div><div><p class="MsoNormal">
<u></u> <u></u></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:<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></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><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">Encoding using libopus 1.1-fixed (audio)</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal">
<span style="font-family:"Courier New"">-----------------------------------------------------</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Input: 44.1kHz 1 channel</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Output: 1 channel (1 uncoupled)</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> 20ms packets, 6kbit/sec VBR</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Preskip: 356</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><u></u> <u></u></p></div>
</div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">Encoding complete </span><u></u><u></u></p></div></div>
</div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New"">-----------------------------------------------------</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal">
<span style="font-family:"Courier New""> Encoded: 2 minutes and 0.02 seconds</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Runtime: 1 minute and 42 seconds</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> (1.177x realtime)</span><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Wrote: 110686 bytes, 6001 packets, 123 pages</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Bitrate: 6.70402kbit/s (without overhead)</span><u></u><u></u></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><u></u><u></u></p></div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> (6 to 28 bytes per packet)</span><u></u><u></u></p>
</div></div></div><div><div><div><p class="MsoNormal"><span style="font-family:"Courier New""> Overhead: 9.13% (container+metadata)</span><u></u><u></u></p></div></div></div></blockquote><div><div><p class="MsoNormal">
<u></u> <u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">I have tried different compiler options but nothing has brought the speed back up. <u></u><u></u></p></div><div><p class="MsoNormal">
<u></u> <u></u></p></div><div><p class="MsoNormal">Any advice on the compiler flags or why I should be seeing such a big speed regression?<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">
Stuart Marsden<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div></div></div></div></div></div></div></blockquote></div><br></div></div>