Comment 2 for bug 1079625

accodrding to this documentation:
http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-libs/html/GstBaseSrc.html
"Controlled shutdown of live sources in applications"
"Since GStreamer 0.10.16 an application may send an EOS event to a source element to make it perform the EOS logic".

So my branch make sure we send EOS before we stop recording.