Posts with the tag Webcam

Changing the Framerate / FPS of an x264 .mp4 movie file without re-encoding

Alain Kelder mentioned this command employing mencoder in his blog post (see resources section):

MOVIE=your-movie.mp4
mencoder -fps 60 -nosound -ovc copy $MOVIE -o $(basename -s .mp4 $MOVIE)_60p_no-re-enc.mp4

Alternatives

Or use MP4Box if it's available for your platform:

# http://askubuntu.com/a/370826/6326
MP4Box -add source.mp4#video -raw 1 -new test
# Then save it as an...

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Using the Raspberry Pi Camera Board on Arch Linux ARM

Update 2014-01-14: There is now a completely Python-based camera-interface for you to work with: picamera

Preparations

Add /opt/vc/bin to your $PATH:

# To add /opt/vc/bin temporarily to your $PATH:
PATH=$PATH:/opt/vc/bin

and set up your /boot/config.txt to contain the following:

gpu_mem=128
start_file=start_x.elf
fixup_file<span...

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Compile MJPG-Streamer from Source on Ubuntu 11.10

Instead of downloading an old .deb package and installing it using sudo dpkg -i mjpg-streamer you can also just get the source, compile and run:

sudo apt-get install libjpeg-dev subversion imagemagick
cd ~/Downloads/
svn co https://mjpg-streamer.svn.sourceforge.net/svnroot/mjpg-streamer mjpg-streamer
cd mjpg-streamer/mjpg-streamer
make clean all

To try a first start, run:

export LD_LIBRARY_PATH=.
./mjpg_streamer...

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Logitech QuickCam Pro 9000

Find out your hardware version

http://www.quickcamteam.net/documentation/faq/how-many-versions-of-the-quickcam-pro-9000-are-there

unfortunately I bought the revision 8 as the following command reveals:

sudo lsusb -d 046d:0990 -v | grep bcdDevice

according to quickcamteam.net this revision has a bug so that you have to unplug the cam from time to time...

get HD video to work with Skype...

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