Converting video for PDA

iRiverter is a good frontend for mencoder. It helps you easy optimize video for your mobile device.

sudo apt-get install iriverter mencoder

Select Jobs -> New -> Single Video and open a file.
Select the device: Device -> iRiver -> PMP Series (for example)
Select the resolution: Device -> Size -> 320x240
You can also change bitrate if you want.
Then press Convert.



After convert you can copy a new file to your memory card and use with mobile device.