Duinotech WXC4394 Handmatig - Pagina 4

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Webcam:

The following commands will install packages to allow a webcam to be used to take (jpg) photos.

Run:

opkg update

opkg install kmod-video-uvc fswebcam

We tested this following on our

QC3203

Webcam, and also some cheap generic webcams, but your

mileage may vary, and extra drivers may be needed.

Use the following command to capture an image to the /tmp folder:

fswebcam -S 10 /tmp/image.jpg

Image Manipulation:

Run the following:

opkg update

opkg install ffmpeg

After capturing a .jpg as above, run this command:

ffmpeg -i /tmp/image.jpg -vf scale=640:-1 /tmp/image.bmp

This will scale the file to 640 pixels wide and convert to bitmap format. This may be handy of you are

using the Arduino to display or manipulate the image, as it is difficult to read .jpg files due to the

compression, but .bmp files are uncompressed.

Audio:

Using our

XC4953 USB

Soundcard, we were able to play MP3's and stream audio from the internet:

opkg update

opkg install kmod-usb-audio kmod-sound-core madplay

To play sounds:

madplay test.mp3

To stream from an internet MP3 stream:

wget -O - http://live-radio01.mediahubaustralia.com/PBW/mp3/ | madplay –

USB Storage:

By default, drivers should be installed for USB flash drives, and should work as long as they have a

FAT or FAT32 partition. Flash drives appear at:

/mnt/sda1

For example, enter the following to work in the root directory of the flash drive:

cd /mnt/sda1

Multiple drives may have names like /mnt/sdb1.