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How to setup a phone as wireless webcam on linux - Crony Akatsuki
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<meta property="og:description" content="Anybody else need to have a webcam nowdays because of all the remote stuff that has started happening since covid, getting forced into having a webcam so that your boss/teacher/professor can follow what you are doing but don’t wanna spend money on getting one and you are luckilly using linux? Then look no further because if you have a decent phone ( S24 in my case ) you can have use it as a wireless webcam ( or usb if your android version is lover than 14 ).">
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<h1>How to setup a phone as wireless webcam on linux</h1>
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<p id="date">20-01-2025</p>
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<a href="https://cronyakatsuki.xyz/tags/linux/">linux</a> <span>|</span>
<a href="https://cronyakatsuki.xyz/tags/android/">android</a> <span>|</span>
<a href="https://cronyakatsuki.xyz/tags/scrcpy/">scrcpy</a></p>
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<p>Anybody else need to have a webcam nowdays because of all the remote stuff that has started happening since covid, getting forced into having a webcam so that your boss/teacher/professor can follow what you are doing but don&rsquo;t wanna spend money on getting one and you are luckilly using linux? Then look no further because if you have a decent phone ( S24 in my case ) you can have use it as a wireless webcam ( or usb if your android version is lover than 14 ).</p>
<p>I will now show you the steps and some basic settings and a script to simplify the steps.</p>
<!-- raw HTML omitted -->
<h1 id="1-enable-wirelessusb-debugging-on-your-phone">1. Enable Wireless/Usb Debugging on your phone</h1>
<p>First you will have to enable wireless/usb debugging on your phone. The steps can somewhat differ depending on your phone and as such I will use my phone as an example.</p>
<ol>
<li>Enter your settings</li>
<li>Enter &ldquo;About phone&rdquo;</li>
<li>Enter &ldquo;Software Information&rdquo;</li>
<li>Click on &ldquo;Build number&rdquo; until a popup tells you developer mode has been enable</li>
<li>Exit back to main menu of settings and enter &ldquo;Developer Options&rdquo;</li>
<li>Enable Wireless/Usb debugging</li>
</ol>
<p>Note that for Wireless Debugging you will have to enable it again every time you wanna use your phone as a webcam. To help with that you can ebale wireless debugging as a tile by going to developer options&gt;&ldquo;Quick settings for developer tiles&rdquo; and enabling wireless debugging.</p>
<h1 id="2-installing-necesarry-software-on-your-linux-system">2. Installing necesarry software on your linux system</h1>
<p>Now we have to install the needed software on your linux system to make all this work. I will use arch as an example but will first list the software you need:</p>
<ul>
<li>android-tools (adb)</li>
<li>v4l2loopback</li>
<li>scrcpy</li>
</ul>
<blockquote>
<p>example command</p>
</blockquote>
<div class="highlight"><pre tabindex="0" style="color:#c6d0f5;background-color:#303446;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo pacman -S android-tools v4l2loopback-dkms scrcpy
</span></span></code></pre></div><h1 id="3-pair-your-phone-with-your-pc-using-adb">3. Pair your phone with your pc using adb</h1>
<p>Now we will need to pair your phone using adb wirelessly with your pc.</p>
<p>Go to wireless debugging settings on your phone, make sure it&rsquo;s enable and click the pair with code option. Take note of the ip and port, you will have to use it on your pc.</p>
<p>Next you have to run this command: <code>adb pair IP:PORT</code>. After running the command you have to enter the pair code and press enter.</p>
<p>And we are done, you are now connected to your phone.</p>
<h1 id="4-setup-video-dummy-device-and-output-camera-feed-to-it">4. Setup video dummy device and output camera feed to it.</h1>
<p>Now we need to setup a dummy video device using v4l2loopback driver, using this command : <code>sudo modprobe -v v4l2loopback exclusive_caps=1 card_label=&quot;Virtual Webcam&quot;</code>.</p>
<p>Now we need to use the command <code>v4l2-ctl</code> to get which number the video device is, in my case it&rsquo;s <code>/dev/video2</code></p>
<blockquote>
<p>example</p>
</blockquote>
<div class="highlight"><pre tabindex="0" style="color:#c6d0f5;background-color:#303446;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>❯ v4l2-ctl --list-devices
</span></span><span style="display:flex;"><span>Virtual Webcam <span style="color:#99d1db;font-weight:bold">(</span>platform:v4l2loopback-000<span style="color:#99d1db;font-weight:bold">)</span>:
</span></span><span style="display:flex;"><span> /dev/video2
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span>HD User Facing: HD User Facing <span style="color:#99d1db;font-weight:bold">(</span>usb-0000:05:00.3-1<span style="color:#99d1db;font-weight:bold">)</span>:
</span></span><span style="display:flex;"><span> /dev/video0
</span></span><span style="display:flex;"><span> /dev/video1
</span></span><span style="display:flex;"><span> /dev/media0
</span></span></code></pre></div><p>Now we can use scrcpy to get our phone&rsquo;s camera and show it on your pc in a nice little window, in my case I use this command which is pretty long but will explain it:</p>
<div class="highlight"><pre tabindex="0" style="color:#c6d0f5;background-color:#303446;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>scrcpy --video-source<span style="color:#99d1db;font-weight:bold">=</span>camera --no-audio --camera-facing<span style="color:#99d1db;font-weight:bold">=</span>front --v4l2-sink<span style="color:#99d1db;font-weight:bold">=</span>/dev/video2 --camera-fps<span style="color:#99d1db;font-weight:bold">=</span><span style="color:#ef9f76">60</span> --video-codec<span style="color:#99d1db;font-weight:bold">=</span>h265 --camera-ar<span style="color:#99d1db;font-weight:bold">=</span>4:3 -m1920 --capture-orientation<span style="color:#99d1db;font-weight:bold">=</span>flip90
</span></span></code></pre></div><p>Now to explain the options:</p>
<ul>
<li><code>--video-source=camerate</code> makes sure scrcpy uses your camera as the source</li>
<li><code>--no-audio</code> makes sure to not catch phone mic audio,</li>
<li><code>--camera-facing=front</code> uses front camera, you can change it to use back camera also</li>
<li><code>--v4l2-sink=/dev/video2</code> make sure to use the video output to your &ldquo;Virtual Webcam&rdquo;</li>
<li><code>--camera-fps=60</code> uses 60fps mode of the camera</li>
<li><code>--video-coded=h265</code> provides better quality than <code>h264</code>, but higher latency</li>
<li><code>--camera-ar=4:3</code> and <code>-m1920</code> limits resolution to 1920 and makes it 4:3, for more caught on camera</li>
<li><code>--capture-orientation=flip90</code> flips the picture and rotates it by 90 degrees, you don&rsquo;t need the 90 and can use just flip0 if you make your phone stand landscape</li>
</ul>
<p>And now you have a nice little window showing of your phone camera wirelessly on your pc. It is also accebible with software like zoom/obs/discord/&hellip;</p>
<hr>
<p>Hope you had a decent time reading this and have managed to get it all working with your nice new webcam ;)</p>
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