when I try to use the "blue screen filter" application, this not applied on video, some tiny parts are removed from the center of green screen.
I did the steps carefully after reading many tutorials and descriptions including this site , but the problem still exists.
The second problem is : when I render the project, there is no voice in the resulted file although all the voice setting are adjusted before based on the site illustration.
known that I use Ubuntu 14.04 version, when the problem appeared, I uninstalled the current version and installed the new one. but the problem didn't be solved, so I installed ubuntu studio, the problem still exist. I searched and read different topics in the forum associated with sound and chroma but I didn't find the reason for my problem.

moved to Kdenlive forum