This tool helps you to record your skype calls – it simply creates on mp3-file for each conversation.
http://atdot.ch/scr/

Under Ubuntu: download and install the .deb-file and start recording.

Worked for me without any problem.

Resize all JPG files in current folder to a width of 1280:

mogrify -resize 1280x *.JPG

Note: Original files will be overwritten