Hi, I've received this bug report.
Christian I can reproduce this with any dvd I have around here. Any command with either $ tccat -i /dev/sr0 -T1 | tcdemux -A xx or $ tccat -i /dev/sr0 -T1 > tmpfile $ tcdemux -i tmpfile -A xx results in the same segfault. I encountered this today in testing, but upgraded to unstable before reporting. All other options in tcdemux appear to work correctly, including -a. But -A is the only option that allows me to filter subtitle tracks.