regression on dual-pipeline UDP in video-stream.sh

[bvacaliuc]

A recent inquiry had this call as input:

UDP_HOST=172.18.1.29 UDP_PORT=5600 UDP_IFACE=enp6s0 ./video-stream.sh 1280 720 15 1800 rtmp://video.blahblah.com:1935/live/BLAH testpi encd,h264,rtmp,udp,debug

An ELP camera was available on USB. It was correctly discovered and the H.264 interface selected, but the the pipeline produced was:

 v4l2src device=/dev/video1 io-mode=mmap !  ! "video/x-h264,stream-format=(string)byte-stream,width=(int)1280,height=(int)720,framerate=(fraction)15/1" ! h264parse ! queue max-size-buffers=0 max-size-bytes=0 max-size-time=134000000 min-threshold-buffers=1 leaky=upstream ! mux.video flvmux streamable=true name=mux ! rtmpsink location="rtmp://video.blahblah.com:1935/live/BLAH/testpi live=1 flashver=FME/3.0%20(compatible;%20FMSc%201.0)"

Which has the following problems:

• there is an extra ! in fromt of the caps line
• there is no tee, which would have been expected with both rtmp,udp in the flags