is gstreamer 1.0 fdsrc broken ?

[john]

exec 3< /dev/dvb/adapter0/dvr0
gst-launch-0.10 --gst-debug level=3 fdsrc fd=3 \
! tsdemux program-number=4164 name=demux ! queue max-size-time=0
max-size-buffers=0 ! mpegvideoparse ! mpeg2dec ! autovideosink demux. ! \
queue max-size-buffers=0 max-size-time=0 ! mad ! alsasink

above working fine

exec 3< /dev/dvb/adapter0/dvr0
gst-launch-1.0 --gst-debug level=3 fdsrc fd=3 \
! tsdemux program-number=4164 name=demux ! queue max-size-time=0
max-size-buffers=0 ! mpegvideoparse ! mpeg2dec ! autovideosink demux. ! \
queue max-size-buffers=0 max-size-time=0 ! mad ! alsasink

not working  no preroll