Changing the mp3 profile to: audio/x-raw-int,rate=44100,channels=2 ! lame name=enc preset=1001 ! xingmux ! id3v2mux makes the seg fault go away.
Changing the mp3 profile to: audio/x- raw-int, rate=44100, channels= 2 ! lame name=enc preset=1001 ! xingmux ! id3v2mux
makes the seg fault go away.