Video clip demonstrating a <a href="https://en.wikipedia.org/wiki/Jacob%27s_ladder_(toy)" class="extiw" title="w:Jacob's ladder (toy)">Jacob's Ladder</a> in use.
<p>This video file has had its audio removed as follows.
</p>
<dl><dd>download File:Jacob's Ladder toy demonstration.ogg (note the original has since been deleted and <a href="//commons.wikimedia.org/wiki/File:Jacob%27s_Ladder_toy_demonstration.ogg" class="mw-redirect" title="File:Jacob's Ladder toy demonstration.ogg">another version</a> was uploaded without background music)</dd></dl><div class="tpl-hidden mw-collapsible mw-collapsed">
<style data-mw-deduplicate="TemplateStyles:r695744913">.mw-parser-output .tpl-hidden{clear:both}.mw-parser-output .tpl-hidden>.mw-collapsible-toggle{float:none}.mw-parser-output .tpl-hidden::before{display:none}html.client-js .mw-parser-output .tpl-hidden-headertext{padding-left:18px}.mw-parser-output .tpl-hidden.mw-made-collapsible>.mw-collapsible-toggle>.tpl-hidden-headertext{background-image:url("//upload.wikimedia.org/wikipedia/commons/1/10/MediaWiki_Vector_skin_action_arrow.png");background-position:left 50%;background-repeat:no-repeat}.mw-parser-output .tpl-hidden.mw-made-collapsible.mw-collapsed>.mw-collapsible-toggle>.tpl-hidden-headertext{background-image:url("//upload.wikimedia.org/wikipedia/commons/4/41/MediaWiki_Vector_skin_right_arrow.png")}</style><div class="mw-collapsible-toggle" style="font-weight:bold; background-color:transparent; text-align:start; background:#d0ffd0;"><span class="tpl-hidden-headertext">Use ffmpeg2theora-0.25.exe to remove the audio channel:</span></div>
<div class="mw-collapsible-content" style="font-weight:normal; background:transparent; text-align:start; background:#ffe0e0;color:blue;">
<dl><dd><div class="poem"></div></dd></dl><p> ffmpeg2theora-0.25.exe --noaudio Jacob's_Ladder_toy_demonstration.ogg -o jlnv.ogv<br>
During the conversion ffmpeg2theora reported the following.<br>
 [theora @ 0x3f12c0]7 bits left in packet 82<br>
 Input #0, ogg, from 'C:\r\Jacob's_Ladder_toy_demonstration.ogg':<br>
  Duration: 00:00:09.66, start: 0.000000, bitrate: 1472 kb/s<br>
    Stream #0.0: Video: theora, yuv420p, 320x240, 15 tbr, 15 tbn, 15 tbc<br>
    Stream #0.1: Audio: vorbis, 44100 Hz, 2 channels, s16, 79 kb/s<br>
  Metadata<br>
    ENCODER         : ffmpeg2theora 0.15<br>
  [audio disabled].<br>
 [theora @ 0x3f12c0]7 bits left in packet 82<br>
 <br>
  0:00:09.66 audio: 0kbps video: 1442kbps, time elapsed: 00:00:03
</p>
</div>
</div>
<a href="//commons.wikimedia.org/w/index.php?title=User:Polyparadigm&amp;action=edit&amp;redlink=1" class="new" title="User:Polyparadigm (page does not exist)">Polyparadigm</a> (creator); <a href="//commons.wikimedia.org/wiki/User:Garrett" title="User:Garrett">Garrett</a> (converted and uploaded first version); 84user (removed audio)
CC BY-SA 3.0
converted and uploaded by <a href="//commons.wikimedia.org/wiki/User:Garrett" title="User:Garrett">Garrett</a> on behalf of <a href="//commons.wikimedia.org/w/index.php?title=User:Polyparadigm&amp;action=edit&amp;redlink=1" class="new" title="User:Polyparadigm (page does not exist)">Polyparadigm</a>