[Kdenlive-devel] Change audio bitrate :(

[GeBu]

My friend works with videos in KDEnlive (I wrote before): he cut 10s 
part at the beginning and at the end create some effects.
Original video has audio stream 32 kbit/s, but output from KDEnlive has 
48 kbits/s and there is problem to join with original (which has 32 
kbit/s) in mencoder :(.
To add parameter ar=32000 to tab "Custom" does not work.
Sorry, I cannot verify. I have no this type of video.
Jirka (GeBu)