gistfile1.sh

#!/bin/sh
sudo modprobe v4l2loopback

# This works just fine, w/o sound
#gst-launch-0.10 filesrc location=$1 ! decodebin ! v4l2sink device=/dev/video0

# This fails to play
gst-launch-0.10 filesrc location=$1 ! decodebin name=decoder \
   decoder. ! audioconvert ! alsasink \
   decoder. ! videoconvert ! v4l2sink device=/dev/video0 \
#   decoder. ! xvimagesink \