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#atomicsynchronator

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Les capsules du prof Lutz<p>Important milestone for my timecode gizmo: this is the first successful syncing using a cell phone and the Teensy board implementing an USB audio device, plugged as an external mic into the USB-C port. This is important as I'm pivoting my project toward youtubers rather than indy cinematographers who are already using overpriced and counter intuitive SMPTE LTC generators in their workflow 😏 </p><p><a href="https://mamot.fr/tags/atomicSynchronator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atomicSynchronator</span></a> <a href="https://mamot.fr/tags/audio" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>audio</span></a> <a href="https://mamot.fr/tags/videoEditing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>videoEditing</span></a> <a href="https://mamot.fr/tags/filmMaking" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>filmMaking</span></a> <a href="https://mamot.fr/tags/fieldRecording" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>fieldRecording</span></a> <a href="https://mamot.fr/tags/teensy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>teensy</span></a> <a href="https://mamot.fr/tags/timecode" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>timecode</span></a> <a href="https://mamot.fr/tags/ltc" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ltc</span></a></p>
Les capsules du prof Lutz<p><span class="h-card" translate="no"><a href="https://floss.social/@kdenlive" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>kdenlive</span></a></span> searching Issues <a href="https://invent.kde.org/multimedia/kdenlive/-/issues/?sort=created_date&amp;state=opened&amp;search=timecode&amp;first_page_size=20" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">invent.kde.org/multimedia/kden</span><span class="invisible">live/-/issues/?sort=created_date&amp;state=opened&amp;search=timecode&amp;first_page_size=20</span></a> I can't see the feature request I filled there: <a href="https://bugs.kde.org/show_bug.cgi?id=480649" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">bugs.kde.org/show_bug.cgi?id=4</span><span class="invisible">80649</span></a></p><p>"insert clip into timeline using metada timecode" is so a no-brainer for me...🙄 with all those YTbers with Tentacle Sync boxes...</p><p><a href="https://mamot.fr/tags/timecode" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>timecode</span></a> <a href="https://mamot.fr/tags/atomicsynchronator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atomicsynchronator</span></a></p>
Les capsules du prof Lutz<p>Can someone invite me on fosstodon? It's for a less personal account, around my AV projects (instead of creating custom hashtags):</p><p>A- TicTacSync, (formerly known as <a href="https://mamot.fr/tags/atomicsynchronator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atomicsynchronator</span></a> ) a novel GNSS based timecode generator;</p><p>B- SpinClap, a device for in-situ lag measurement between camera audio and video streams (of ms order) see <a href="http://scnat.net/scnat/published/In+Cam+Audio+Lag" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">http://</span><span class="ellipsis">scnat.net/scnat/published/In+C</span><span class="invisible">am+Audio+Lag</span></a></p><p>C- Flosscorder, an audio recorder based on the <a href="https://mamot.fr/tags/BeagleBoard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BeagleBoard</span></a> and its PRU <a href="https://www.diyaudio.com/community/threads/diy-portable-audio-recorder.194130/#post-2662561" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diyaudio.com/community/threads</span><span class="invisible">/diy-portable-audio-recorder.194130/#post-2662561</span></a></p><p><a href="https://mamot.fr/tags/foss" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>foss</span></a> <a href="https://mamot.fr/tags/audiovideo" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>audiovideo</span></a> <a href="https://mamot.fr/tags/videoProduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>videoProduction</span></a></p>
Les capsules du prof Lutz<p>One of my most proud of plot. Geeky, chuck-full of data, and _nice_ .</p><p><a href="https://forums.adafruit.com/viewtopic.php?p=903215#p903215" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">forums.adafruit.com/viewtopic.</span><span class="invisible">php?p=903215#p903215</span></a></p><p>The two small vertical lines at the base correspond to the clock jitter width I measured with a Feather M0 which uses XOSC32K since there's a crystal on the board (the jitter is then as small as ± 0.02 ms).<br> <br><a href="https://mamot.fr/tags/matplotlib" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>matplotlib</span></a> <a href="https://mamot.fr/tags/SAMD21" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SAMD21</span></a> <a href="https://mamot.fr/tags/microcontrollers" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>microcontrollers</span></a> <a href="https://mamot.fr/tags/electronic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>electronic</span></a> <a href="https://mamot.fr/tags/atomicsynchronator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atomicsynchronator</span></a></p>
Les capsules du prof Lutz<p>And I want to break up the gate keeping that emerged among users due to the high cost proprietary hardware and software industry ecosystem: “We’re using those expensive tools because we are pros… if you can’t afford the tools of the trade, too bad…”</p><p>2/3</p><p><a href="https://mamot.fr/tags/audioRecording" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>audioRecording</span></a> <a href="https://mamot.fr/tags/soundengineering" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>soundengineering</span></a> <a href="https://mamot.fr/tags/timecode" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>timecode</span></a> <a href="https://mamot.fr/tags/atomicsynchronator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atomicsynchronator</span></a></p>
Les capsules du prof Lutz<p><span class="h-card"><a href="https://mastodon.cloud/@adafruit" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>adafruit</span></a></span> Oh no!😨 And what about the SAMD21? My project is using its 10 bits DAC output... where are published chips EOL planned dates? <a href="https://mamot.fr/tags/atomicsynchronator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atomicsynchronator</span></a></p>
Les capsules du prof Lutz<p>oh god! je voulais exporter mes synchro multicam avec OpenTimeLineIO mais je découvre que Davinci Resolve ne lit pas les projets otio (et il y a un conflit d'installation entre python et kdenlive que je n'ai pas envie de résoudre)... je cherche donc maintenant du côté de XML ou AAF... mais c'est le bordel côté docu des API: lors de recherches google je ne trouve que des forums où est posé la question "c'est quoi du XML? c'est quoi du AAF" 🙄 </p><p><a href="https://mamot.fr/tags/atomicsynchronator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atomicsynchronator</span></a> <a href="https://mamot.fr/tags/videoproduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>videoproduction</span></a> <a href="https://mamot.fr/tags/videoediting" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>videoediting</span></a></p>
Les capsules du prof Lutz<p>We see the error is less than half a frame, which is nominal (but could be problematic if other lag is added in the workflow, wireless mic) If you know some site or forum where this is discussed, let me know! All I found about this crucial subject (😏 ) is <a href="https://www.dvinfo.net/forum/final-cut-suite/515203-1-2-frame-difference-audio.html#post1785665" rel="nofollow noopener" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">dvinfo.net/forum/final-cut-sui</span><span class="invisible">te/515203-1-2-frame-difference-audio.html#post1785665</span></a></p><p>I did the same measurements for a D300S and I even saw a *rolling* error from -30 to +10 ms ! I guess they are writing sound data to a ring buffer and read it at a different frequency. <a href="https://mamot.fr/tags/atomicsynchronator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atomicsynchronator</span></a></p>
Les capsules du prof Lutz<p>Each time the rotating arm passes over the electrical contact, my python script processes the few frames around this moment and interpolates the exact time (to the nearest millisecond) the video stream "touches" the wire. It then compares this time value with the one detected on the audio stream and compute the difference between them: this is the synchronization error. Plotted here for some 28 passes. <a href="https://mamot.fr/tags/atomicsynchronator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atomicsynchronator</span></a></p>
Les capsules du prof Lutz<p>Well, my results are reproducible, time to publish them!🥳 Here's the raw material. <a href="https://mamot.fr/tags/atomicsynchronator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atomicsynchronator</span></a></p>
Les capsules du prof Lutz<p>I should automate this... for now I'm grabbing coords manually with <a href="https://automeris.io/WebPlotDigitizer" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="">automeris.io/WebPlotDigitizer</span><span class="invisible"></span></a> </p><p><a href="https://mamot.fr/tags/videoproduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>videoproduction</span></a> <a href="https://mamot.fr/tags/soundrecording" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>soundrecording</span></a> <a href="https://mamot.fr/tags/atomicsynchronator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atomicsynchronator</span></a></p>
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