Creature Capture | Stopping Raspivid After a Non-Predetermined Time

<p>One of the biggest problems with the built in commands for using the <a href="http://ift.tt/1zF9dCP" target="_blank">Raspberry Pi Camera module </a>is that you can’t stop a recording after an unknown time. You can record for a given number of seconds and that’s it. I have attempted to solve this problem by backgrounding the initial record process with a time of 27777.8 hours (99999999 seconds) when it’s time to stop recording, the process is manually killed using pkill.</p> <p>Here is a test of my code, which I’ve called CameraModulePlus (written in python) which takes two videos, one for five seconds, and one for ten seconds, with a 10 second delay in between.</p> <div id="crayon-57073a727194f634971728" class="crayon-syntax crayon-theme-orange-code crayon-font-courier-new crayon-os-mac print-yes notranslate" data-settings=" minimize scroll-mouseover"> <div class="crayon-toolbar" data-settings=" show"> <div class="crayon-tools"> <div class="crayon-button crayon-nums-button crayon-pressed" title="Toggle Line Numbers"></div> <div class="crayon-button crayon-plain-button" title="Toggle Plain Code"></div> <div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap"></div> <div class="crayon-button crayon-copy-button" title="Copy"></div> <div class="crayon-button crayon-popup-button" title="Open Code In New Window"></div> <p><span class="crayon-language">Python</span></p> </div> </div> <div class="crayon-plain-wrap"></div> <div class="crayon-main"> <table class="crayon-table"> <tbody> <tr class="crayon-row"> <td class="crayon-nums" data-settings="show"> <div class="crayon-nums-content"> <div class="crayon-num" data-line="crayon-57073a727194f634971728-1">1</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-2">2</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-3">3</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-4">4</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-5">5</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-6">6</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-7">7</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-8">8</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-9">9</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-10">10</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-11">11</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-12">12</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-13">13</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-14">14</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-15">15</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-16">16</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-17">17</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-18">18</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-19">19</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-20">20</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-21">21</div> </div> </td> <td class="crayon-code"> <div class="crayon-pre"> <div id="crayon-57073a727194f634971728-1" class="crayon-line"><span class="crayon-st">from</span> <span class="crayon-e">CameraModulePlus</span> <span class="crayon-r">import</span> <span class="crayon-e">CameraModuleVideo</span></div> <div id="crayon-57073a727194f634971728-2" class="crayon-line crayon-striped-line"><span class="crayon-r">import</span> <span class="crayon-k">subprocess</span></div> <div id="crayon-57073a727194f634971728-3" class="crayon-line"><span class="crayon-st">from</span> <span class="crayon-k">time</span> <span class="crayon-r">import</span> <span class="crayon-e">sleep</span></div> <div id="crayon-57073a727194f634971728-4" class="crayon-line crayon-striped-line"><span class="crayon-r">import</span> <span class="crayon-k">time</span></div> <div id="crayon-57073a727194f634971728-5" class="crayon-line"></div> <div id="crayon-57073a727194f634971728-6" class="crayon-line crayon-striped-line"><span class="crayon-v">v1</span> <span class="crayon-o">=</span> <span class="crayon-e">CameraModuleVideo</span><span class="crayon-sy">(</span><span class="crayon-s">“/home/pi/CreatureCapture/”</span><span class="crayon-sy">,</span> <span class="crayon-s">“video1”</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-7" class="crayon-line"><span class="crayon-v">v2</span> <span class="crayon-o">=</span> <span class="crayon-e">CameraModuleVideo</span><span class="crayon-sy">(</span><span class="crayon-s">“/home/pi/CreatureCapture/”</span><span class="crayon-sy">,</span> <span class="crayon-s">“video2”</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-8" class="crayon-line crayon-striped-line"></div> <div id="crayon-57073a727194f634971728-9" class="crayon-line"><span class="crayon-st">try</span><span class="crayon-o">:</span></div> <div id="crayon-57073a727194f634971728-10" class="crayon-line crayon-striped-line"><span class="crayon-v">v1</span><span class="crayon-sy">.</span><span class="crayon-e">startRecording</span><span class="crayon-sy">(</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-11" class="crayon-line"><span class="crayon-k">time</span><span class="crayon-sy">.</span><span class="crayon-e">sleep</span><span class="crayon-sy">(</span><span class="crayon-cn">5</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-12" class="crayon-line crayon-striped-line"><span class="crayon-v">v1</span><span class="crayon-sy">.</span><span class="crayon-e">stopRecording</span><span class="crayon-sy">(</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-13" class="crayon-line"></div> <div id="crayon-57073a727194f634971728-14" class="crayon-line crayon-striped-line"><span class="crayon-k">time</span><span class="crayon-sy">.</span><span class="crayon-e">sleep</span><span class="crayon-sy">(</span><span class="crayon-cn">10</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-15" class="crayon-line"></div> <div id="crayon-57073a727194f634971728-16" class="crayon-line crayon-striped-line"><span class="crayon-v">v2</span><span class="crayon-sy">.</span><span class="crayon-e">startRecording</span><span class="crayon-sy">(</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-17" class="crayon-line"><span class="crayon-k">time</span><span class="crayon-sy">.</span><span class="crayon-e">sleep</span><span class="crayon-sy">(</span><span class="crayon-cn">10</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-18" class="crayon-line crayon-striped-line"><span class="crayon-v">v2</span><span class="crayon-sy">.</span><span class="crayon-e">stopRecording</span><span class="crayon-sy">(</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-19" class="crayon-line"></div> <div id="crayon-57073a727194f634971728-20" class="crayon-line crayon-striped-line"><span class="crayon-st">except</span> <span class="crayon-k">ValueError</span> <span class="crayon-st">as</span> <span class="crayon-v">e</span><span class="crayon-o">:</span></div> <div id="crayon-57073a727194f634971728-21" class="crayon-line"><span class="crayon-k">print</span><span class="crayon-sy">(</span><span class="crayon-v">e</span><span class="crayon-sy">)</span></div> </div> </td> </tr> </tbody> </table> </div> </div> <p>Here is a result of the 5 second duration test:</p> <div class="ezAdsense adsense adsense-midtext" style="text-align:center;margin:12px;"><script async="" src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js" type="text/javascript"> </script> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-2979805726071943" data-ad-slot="7471922310" data-ad-format="auto"></ins> <script type="text/javascript"> //<![CDATA[ (adsbygoogle = window.adsbygoogle || []).push({}); //]]> </script></div> <p><iframe width="678" height="381" src="https://www.youtube.com/embed/8MPRylqqxr4?feature=oembed" frameborder="0" allowfullscreen=""></iframe></p> <p> </p> <p>Here is a result of the 10 second duration test:</p> <p><iframe width="678" height="381" src="https://www.youtube.com/embed/N3yThiJD5nw?feature=oembed" frameborder="0" allowfullscreen=""></iframe></p> <p><span style="font-family: 'Source Sans Pro'; font-size: 18px; line-height: 27px;"> </span></p> <div id="huge-it-share-buttons-top" class="huge-it-share-buttons nobackground"> <h3>Share This:</h3> <ul class="huge-it-share-buttons-list"> <li class=" nobackground"><a href="http://ift.tt/1LIxY7s" id="backforunical464" name="backforunical464" 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Creature Capture | Stopping Raspivid After a Non-Predetermined Time

One of the biggest problems with the built in commands for using the  Raspberry Pi Camera module  is that you can’t stop a recording after a...

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Creature Capture | Stopping Raspivid After a Non-Predetermined Time

<p>One of the biggest problems with the built in commands for using the <a href="http://ift.tt/1zF9dCP" target="_blank">Raspberry Pi Camera module </a>is that you can’t stop a recording after an unknown time. You can record for a given number of seconds and that’s it. I have attempted to solve this problem by backgrounding the initial record process with a time of 27777.8 hours (99999999 seconds) when it’s time to stop recording, the process is manually killed using pkill.</p> <p>Here is a test of my code, which I’ve called CameraModulePlus (written in python) which takes two videos, one for five seconds, and one for ten seconds, with a 10 second delay in between.</p> <div id="crayon-57073a727194f634971728" class="crayon-syntax crayon-theme-orange-code crayon-font-courier-new crayon-os-mac print-yes notranslate" data-settings=" minimize scroll-mouseover"> <div class="crayon-toolbar" data-settings=" show"> <div class="crayon-tools"> <div class="crayon-button crayon-nums-button crayon-pressed" title="Toggle Line Numbers"></div> <div class="crayon-button crayon-plain-button" title="Toggle Plain Code"></div> <div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap"></div> <div class="crayon-button crayon-copy-button" title="Copy"></div> <div class="crayon-button crayon-popup-button" title="Open Code In New Window"></div> <p><span class="crayon-language">Python</span></p> </div> </div> <div class="crayon-plain-wrap"></div> <div class="crayon-main"> <table class="crayon-table"> <tbody> <tr class="crayon-row"> <td class="crayon-nums" data-settings="show"> <div class="crayon-nums-content"> <div class="crayon-num" data-line="crayon-57073a727194f634971728-1">1</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-2">2</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-3">3</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-4">4</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-5">5</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-6">6</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-7">7</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-8">8</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-9">9</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-10">10</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-11">11</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-12">12</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-13">13</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-14">14</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-15">15</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-16">16</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-17">17</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-18">18</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-19">19</div> <div class="crayon-num crayon-striped-num" data-line="crayon-57073a727194f634971728-20">20</div> <div class="crayon-num" data-line="crayon-57073a727194f634971728-21">21</div> </div> </td> <td class="crayon-code"> <div class="crayon-pre"> <div id="crayon-57073a727194f634971728-1" class="crayon-line"><span class="crayon-st">from</span> <span class="crayon-e">CameraModulePlus</span> <span class="crayon-r">import</span> <span class="crayon-e">CameraModuleVideo</span></div> <div id="crayon-57073a727194f634971728-2" class="crayon-line crayon-striped-line"><span class="crayon-r">import</span> <span class="crayon-k">subprocess</span></div> <div id="crayon-57073a727194f634971728-3" class="crayon-line"><span class="crayon-st">from</span> <span class="crayon-k">time</span> <span class="crayon-r">import</span> <span class="crayon-e">sleep</span></div> <div id="crayon-57073a727194f634971728-4" class="crayon-line crayon-striped-line"><span class="crayon-r">import</span> <span class="crayon-k">time</span></div> <div id="crayon-57073a727194f634971728-5" class="crayon-line"></div> <div id="crayon-57073a727194f634971728-6" class="crayon-line crayon-striped-line"><span class="crayon-v">v1</span> <span class="crayon-o">=</span> <span class="crayon-e">CameraModuleVideo</span><span class="crayon-sy">(</span><span class="crayon-s">“/home/pi/CreatureCapture/”</span><span class="crayon-sy">,</span> <span class="crayon-s">“video1”</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-7" class="crayon-line"><span class="crayon-v">v2</span> <span class="crayon-o">=</span> <span class="crayon-e">CameraModuleVideo</span><span class="crayon-sy">(</span><span class="crayon-s">“/home/pi/CreatureCapture/”</span><span class="crayon-sy">,</span> <span class="crayon-s">“video2”</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-8" class="crayon-line crayon-striped-line"></div> <div id="crayon-57073a727194f634971728-9" class="crayon-line"><span class="crayon-st">try</span><span class="crayon-o">:</span></div> <div id="crayon-57073a727194f634971728-10" class="crayon-line crayon-striped-line"><span class="crayon-v">v1</span><span class="crayon-sy">.</span><span class="crayon-e">startRecording</span><span class="crayon-sy">(</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-11" class="crayon-line"><span class="crayon-k">time</span><span class="crayon-sy">.</span><span class="crayon-e">sleep</span><span class="crayon-sy">(</span><span class="crayon-cn">5</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-12" class="crayon-line crayon-striped-line"><span class="crayon-v">v1</span><span class="crayon-sy">.</span><span class="crayon-e">stopRecording</span><span class="crayon-sy">(</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-13" class="crayon-line"></div> <div id="crayon-57073a727194f634971728-14" class="crayon-line crayon-striped-line"><span class="crayon-k">time</span><span class="crayon-sy">.</span><span class="crayon-e">sleep</span><span class="crayon-sy">(</span><span class="crayon-cn">10</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-15" class="crayon-line"></div> <div id="crayon-57073a727194f634971728-16" class="crayon-line crayon-striped-line"><span class="crayon-v">v2</span><span class="crayon-sy">.</span><span class="crayon-e">startRecording</span><span class="crayon-sy">(</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-17" class="crayon-line"><span class="crayon-k">time</span><span class="crayon-sy">.</span><span class="crayon-e">sleep</span><span class="crayon-sy">(</span><span class="crayon-cn">10</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-18" class="crayon-line crayon-striped-line"><span class="crayon-v">v2</span><span class="crayon-sy">.</span><span class="crayon-e">stopRecording</span><span class="crayon-sy">(</span><span class="crayon-sy">)</span></div> <div id="crayon-57073a727194f634971728-19" class="crayon-line"></div> <div id="crayon-57073a727194f634971728-20" class="crayon-line crayon-striped-line"><span class="crayon-st">except</span> <span class="crayon-k">ValueError</span> <span class="crayon-st">as</span> <span class="crayon-v">e</span><span class="crayon-o">:</span></div> <div id="crayon-57073a727194f634971728-21" class="crayon-line"><span class="crayon-k">print</span><span class="crayon-sy">(</span><span class="crayon-v">e</span><span class="crayon-sy">)</span></div> </div> </td> </tr> </tbody> </table> </div> </div> <p>Here is a result of the 5 second duration test:</p> <div class="ezAdsense adsense adsense-midtext" style="text-align:center;margin:12px;"><script async="" src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js" type="text/javascript"> </script> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-2979805726071943" data-ad-slot="7471922310" data-ad-format="auto"></ins> <script type="text/javascript"> //<![CDATA[ (adsbygoogle = window.adsbygoogle || []).push({}); //]]> </script></div> <p><iframe width="678" height="381" src="https://www.youtube.com/embed/8MPRylqqxr4?feature=oembed" frameborder="0" allowfullscreen=""></iframe></p> <p> </p> <p>Here is a result of the 10 second duration test:</p> <p><iframe width="678" height="381" src="https://www.youtube.com/embed/N3yThiJD5nw?feature=oembed" frameborder="0" allowfullscreen=""></iframe></p> <p><span style="font-family: 'Source Sans Pro'; font-size: 18px; line-height: 27px;"> </span></p> <div id="huge-it-share-buttons-top" class="huge-it-share-buttons nobackground"> <h3>Share This:</h3> <ul class="huge-it-share-buttons-list"> <li class=" nobackground"><a href="http://ift.tt/1LIxY7s" id="backforunical464" name="backforunical464" 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Creature Capture | Stopping Raspivid After a Non-Predetermined Time

One of the biggest problems with the built in commands for using the  Raspberry Pi Camera module  is that you can’t stop a recording after a...

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