Sorry for my english.
Searching on forum, I found this topic: http://www.kdenlive.org/forum/solved-kdenlive-rendering-crashed
It relates the problem of mlt with aac sound support. I remembered I had already solved problems like this in Ubuntu with the command padsp, which emulates the dsp device (since it no longer exists on Ubuntu).
So I test in Kdenlive, and it worked!
I used this command: padsp kdenlive