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    <title>Lalit Maganti</title>
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      <title>V4L2 and Hardware Encoding on the Raspberry Pi</title>
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      <pubDate>Mon, 01 Feb 2021 23:00:00 +0000</pubDate>
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      <description>&lt;p&gt;&lt;strong&gt;TLDR&lt;/strong&gt;: Explain how the V4L2 M2M API works through the use-case of implementing hardware video encoding on&#xA;the Raspberry Pi. This knowledge is generally useful as V4L2 is the de-facto generic API for hardware decoding&#xA;and encoding on Linux.&lt;/p&gt;&#xA;&lt;h1 id=&#34;background&#34;&gt;Background&lt;/h1&gt;&#xA;&lt;p&gt;My journey started at &lt;a href=&#34;https://www.youtube.com/watch?v=CyEpshm16HY&amp;amp;t=139s&#34;&gt;this video&lt;/a&gt;&#xA;on the excellent &lt;a href=&#34;https://www.youtube.com/channel/UCp3yVOm6A55nx65STpm3tXQ&#34;&gt;Craft Computing&lt;/a&gt; YouTube channel&#xA;which showed how to setup TinyPilot, a Python app for KVM over IP which runs on a Raspberry Pi.&#xA;Behind the scenes, TinyPilot uses &lt;a href=&#34;https://github.com/pikvm/ustreamer&#34;&gt;ustreamer&lt;/a&gt; to read frames&#xA;from a HDMI capture card and either exposes it over HTTP or writes it to shared memory. Along with the&#xA;MJPEG output, support was recently added for encoding video using H264.&lt;/p&gt;</description>
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      <title>Lalit Maganti</title>
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      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
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      <description>&lt;p&gt;I&amp;rsquo;m a software engineer working at Google on &lt;a href=&#34;https://perfetto.dev&#34;&gt;Perfetto&lt;/a&gt;,&#xA;a suite of open source tracing tools helping developers understand the behaviour&#xA;and performance of complex systems. This includes both Android and Chrome where&#xA;Perfetto is the default tracing system but is also used by many other teams in&#xA;Google and by other companies in the industry.&lt;/p&gt;&#xA;&lt;p&gt;In my spare time, I tinker with projects from a variety of computer scinece&#xA;domains and write endless (largely unreleased) personal projects. I also play&#xA;copious amounts of chess.&lt;/p&gt;</description>
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