How do I "log" the M most recent images from a webcam using the command-line?
Solution 1:
Well ,why don't you try uvccapture or fswebcam both are an excellent choices.
For using uvccapture, install using sudo apt-get install uvccapture and to use
uvvcaputure -m -q100 -x640 -y480 -opic.jpg where pic.jpg is the filename.
Similarly install fswebcam and to use fswebcam $filename,
Solution 2:
Try using webcam. Here you find more info regarding webcam https://help.ubuntu.com/community/Webcam