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webcam screenshots

Using ffmpeg with webcam

take one image per second
-r 1
to take images for 3 seconds
-t 3

so this will give you 3 jpegs in your root directory at vga resolution

ffmpeg -y -r 1 -t 3 -f video4linux2 -s vga -i /dev/video0 ~/camshot%d.jpeg

similarly here is a cheap way to capture webcam video:

rxvt +sb -bg orange -geometry 80x2 -e ffmpeg -y -f oss -i /dev/audio -f video4linux2 -s qvga -i /dev/video0 ~/a.avi

Using mplayer with webcam

changing -frames to different values changes number of screenshots.

mplayer -fps 1 tv:// -tv driver=v4l2:device=/dev/video0:width=320:height=240:outfmt=rgb24 -frames 5 -vo jpeg

Author: admin -  Date: 18 Dec 2011 04:25
Category: ffmpeg -  Visits: 3124

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Convert .ogg to .mp3

for x in *.ogg; do ffmpeg -i "$x" -ab 128 "`basename "$x" .ogg`.mp3"; done

This does an entire dir at once. You must be inside the dir you want to convert. Substitute whatever you want your target bitrate to be up where 128 is.

Author: admin -  Date: 18 Dec 2011 04:13
Category: ffmpeg -  Visits: 1949

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