IoT & Hardware
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You're reading from  Raspberry Pi for Secret Agents

Product typeBook
Published inApr 2013
PublisherPackt
ISBN-139781849695787
Edition1st Edition
Tools
Raspberry PiLinux
Concepts
Robotics
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Author (1)
Stefan Sjogelid
Stefan Sjogelid
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Stefan Sjogelid

Stefan Sjogelid grew up in the 1980s in Sweden, getting hooked on 8-bit consoles, Amigas, and BBSes. With a background in system and network administration, he packed his bags for Southeast Asia and continued to work in IT for many years, before love and a magic 8 ball told him to seek new opportunities in the North American continent. The Raspberry Pi is the latest gadget to grab Stefan's attention, and after much tinkering and learning a great deal about the unique properties of the Pi, he launched the PiLFS website (http://www.intestinate.com/pilfs), which teaches readers how to build their own GNU/Linux distribution and applications that are particularly useful on Raspberry Pi.
Read more about Stefan Sjogelid

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Setting up your camera

Go ahead, plug in your webcam and boot up the Pi; we'll take a closer look at what makes it tick.

Note

If you experimented with the dwc_otg.speed parameter to improve the audio quality during the previous chapter, you should change it back now by changing its value from 1 to 0, as chances are that your webcam will perform worse or will not perform at all, because of the reduced speed of the USB ports.

Meet the USB Video Class drivers and Video4Linux

Just as the Advanced Linux Sound Architecture (ALSA) system provides kernel drivers and a programming framework for your audio gadgets, there are two important components involved in getting your webcam to work under Linux:

  • The Linux USB Video Class (UVC) drivers provide the low-level functions for your webcam, which are in accordance with a specification followed by most webcams produced today.

  • Video4Linux (V4L) is a video capture framework used by applications that record video from webcams, TV tuners, and other video-producing...

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Raspberry Pi for Secret Agents
Published in: Apr 2013Publisher: PacktISBN-13: 9781849695787
© 2013 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Stefan Sjogelid

Stefan Sjogelid grew up in the 1980s in Sweden, getting hooked on 8-bit consoles, Amigas, and BBSes. With a background in system and network administration, he packed his bags for Southeast Asia and continued to work in IT for many years, before love and a magic 8 ball told him to seek new opportunities in the North American continent. The Raspberry Pi is the latest gadget to grab Stefan's attention, and after much tinkering and learning a great deal about the unique properties of the Pi, he launched the PiLFS website (http://www.intestinate.com/pilfs), which teaches readers how to build their own GNU/Linux distribution and applications that are particularly useful on Raspberry Pi.
Read more about Stefan Sjogelid

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