How do I make a news-like lower third in kdenlive?
Just use an affine transform for the title 


Create a title with the text
Put the video on track 2
Put the title on track 1
Combine them with an affine transformation
On the affine transformation, add 4 key frames for a title of 5 seconds, at 0 / 1 / 4 / 5 seconds
Set the opacity for keyframe at second 0 and second 5 to 0. Keyframes at second 1 and 4 keep 100% opacity
Play. The title fades in for a second, stays for 3 seconds and fades out for a second.


Screencast: http://cweiske.de/tagebuch/kdenlive-lower-third.htm