Differenze tra le versioni di "Tutorials/arduino-yun-videorecorder-101"

Versione delle 10:38, 22 mag 2014

Arduino Yun Basics

This tutorial covers a little introduction to video recording with Arduino Yun and a USB webcam. No Arduino code in this first part, only some linux embedded configuration on the awesome Arduino Yun board!

I assume that the reader has a pc or a mac (named Bob) and an Arduino Yun, named Arduino. Moreover, I suppose the reader is quite familiar with the computer in general and know a little bit of shell/linux commands. In particular I in my case Bob is amac os/x and, and everything is starting with an iTerm2 session where everything begin with a dollar sign ($)..

Before starting

Assure we have:

Installed and working Arduino Ide version 1.5.6-r2.
Configured Arduino Yun board. See Basic Arduino Yun wireless configuration.

Install some useful packages for video and webcam:

    ~ opkg update
    ~ opkg install kmod-video-uvc kmod-video-pwc kmod-input-core
    ~ opkg install libjpeg fswebcam
    ~ wget http://www.custommobileapps.com.au/downloads/mjpg-streamer.ipk
    ~ opkg install mjpg-streamer.ipk
    ~ opkg install ffmpeg ffserver
    ~ opkg install python-openssl

With standard usb uvc cam

To see the stream (from Arduino to Bob):

   ~ mjpg_streamer -i "input_uvc.so -d /dev/video0 -r 640x480" -o "output_http.so -p 8080 -w /mnt/sda1"

Then open "http://arduino.local:8080/?action=stream" in a brower (inside Bob)

To shoot a photo (on Arduino):

   ~ fswebcam test.png

and to see the photo via http request from Bob, just start a

   ~ python -m SimpleHTTPServer

in the directory where the photo is saved and access it by browsing (from Bob) to "192.168.1.13/test.png"

With PS3 Eye Webcam

http://forum.arduino.cc/index.php?topic=231712.0 maybe can help

References

@@ Riga 10: / Riga 10: @@
 * Configured Arduino Yun board. See [http://arduino.cc/en/Guide/ArduinoYun Basic Arduino Yun wireless configuration].
-===Let's become confident with the board===
+Install some useful packages for video and webcam:
-arduino.local does not always resole, so safely to use  the ip number (192.168.240.1, for initial configuration) then the host name.
-To log into the yun via ssh (from Bob shell):
+<pre>
-	$ ssh root@192.168.1.13
-Now you're logged in the Arduino Yun linux board. We are inside an embedded linux machine, in particular a child of [http://en.wikipedia.org/wiki/OpenWrt OpenWrt].
-For briefness I will differentiate what is happening inside the iTerm session in Bob with $ and what is happening inside the yun shell accessed via ssh with ~.
-See which distribution, kernel version, etc:
-    ~ cat /proc/version
-    Linux version 3.8.3 (federico@smilzo) (gcc version 4.6.4 20121210 (prerelease) (Linaro GCC 4.6-2012.12) ) #8 Mon Aug 19 16:22:39 CEST 2013
-See if the micro sd card is already mounted:
-    mount
-I won't specify every time the path but I'm going to use the micro sd card for storing videos or pic rues from the welcome.
-Install some useful packages for video and webcam:
      ~ opkg update
      ~ opkg install kmod-video-uvc kmod-video-pwc kmod-input-core
@@ Riga 35: / Riga 20: @@
      ~ opkg install ffmpeg ffserver
      ~ opkg install python-openssl
+</pre>
-After each installed package, to see free space on the hard disk:
-    ~ df -h
-    Filesystem                Size      Used Available Use% Mounted on
-    rootfs                    7.5M      4.9M      2.6M  66% /
-    /dev/root                 7.0M      7.0M         0 100% /rom
-    tmpfs                    29.9M    372.0K     29.5M   1% /tmp
-    tmpfs                   512.0K         0    512.0K   0% /dev
-    /dev/mtdblock3            7.5M      4.9M      2.6M  66% /overlay
-    overlayfs:/overlay        7.5M      4.9M      2.6M  66% /
-    /dev/sda1                 7.4G    848.0K      7.4G   0% /mnt/sda1
-To run a python server
-    ~ python -m SimpleHTTPServer
-See if python server (or the streaming server, vide infra) is running (from Bob),
-    $ nmap 192.168.1.13
-    Starting Nmap 6.40 ( http://nmap.org ) at 2014-04-30 13:03 CEST
-    Nmap scan report for 192.168.1.13
-    Host is up (0.19s latency).
-    Not shown: 995 closed ports
-    PORT     STATE SERVICE
-/tcp   open  ssh
-/tcp   open  domain
-/tcp   open  http
-/tcp  open  https
-/tcp open  http-alt
-    Nmap done: 1 IP address (1 host up) scanned in 39.77 seconds
 == With standard usb uvc cam ==