Playing and streaming, is it possible?

[Jose Antonio Santos Cadenas]

Hi,

2011/6/2 Paulo Paiva <paivalhao at gmail.com>:
> Hello all!
>
> I'm struggling here trying to play the video acquired from the web-cam and
> stream it simultaneously but it isn't working. Here goes my pipeline
> (inspired in the examples given):
>
> #!/bin/sh
>
> # Destination of the stream
> DEST=127.0.0.1
>
> # Tuning parameters to make the sender send the streams out of sync. Can be
> used
> # ot test the client RTCP synchronisation.
> VOFFSET=0
> AOFFSET=0
>
> # Video setup
> VELEM="v4l2src "
> VCAPS="video/x-raw-yuv,width=352,height=288,framerate=20/1"
> VSOURCE="$VELEM ! $VCAPS ! queue ! ffmpegcolorspace"
> VENC="x264enc tune=zerolatency byte-stream=true bitrate=550 threads=0
> speed-preset=3"
>
> # Video transmission setup
> VRTPSINK="udpsink port=5000 host=$DEST ts-offset=$VOFFSET name=vrtpsink"
> VRTCPSINK="udpsink port=5001 host=$DEST sync=false async=false
> name=vrtcpsink"
> VRTCPSRC="udpsrc port=5005 name=vrtpsrc"
>
> # Audio setup
> AELEM="pulsesrc"
> ASOURCE="$AELEM ! queue ! audioconvert"
> AENC=" faac! rtpmp4apay"
>
> # Audio transmission setup
> ARTPSINK="udpsink port=5002 host=$DEST ts-offset=$AOFFSET name=artpsink"
> ARTCPSINK="udpsink port=5003 host=$DEST sync=false async=false
> name=artcpsink"
> ARTCPSRC="udpsrc port=5007 name=artpsrc"
>
> # Pipeline construction
> gst-launch -v gstrtpbin name=rtpbin             \
>     $VSOURCE ! tee name=v ! autovideosink v. ! $VENC ! rtph264pay !
> rtpbin.send_rtp_sink_0   \
>         rtpbin.send_rtp_src_0 ! $VRTPSINK       \
>         rtpbin.send_rtcp_src_0 ! $VRTCPSINK     \
>           $VRTCPSRC ! rtpbin.recv_rtcp_sink_0   \
>     $ASOURCE ! $AENC ! rtpbin.send_rtp_sink_1   \
>         rtpbin.send_rtp_src_1 ! $ARTPSINK       \
>         rtpbin.send_rtcp_src_1 ! $ARTCPSINK     \
>           $ARTCPSRC ! rtpbin.recv_rtcp_sink_1
>
> Has all can see I got a tee after the acquisition, after that autovideosink
> in order to displays and I pass on the video flux for streaming.
>
> The output of execution is:
>
> $ sh v4l2server.sh
> Setting pipeline to PAUSED ...
> /GstPipeline:pipeline0/GstPulseSrc:pulsesrc0: actual-buffer-time = 47551927
> /GstPipeline:pipeline0/GstPulseSrc:pulsesrc0: actual-latency-time = 9977
> /GstPipeline:pipeline0/GstPulseSrc:pulsesrc0.GstPad:src: caps =
> audio/x-raw-int, endianness=(int)1234, signed=(boolean)true, width=(int)16,
> depth=(int)16, rate=(int)44100, channels=(int)1,
> channel-positions=(GstAudioChannelPosition)<
> GST_AUDIO_CHANNEL_POSITION_FRONT_MONO >
> ERROR: Pipeline doesn't want to pause.
> ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could not
> negotiate format
> Additional debug info:
> gstbasesrc.c(2811): gst_base_src_start ():
> /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
> Check your filtered caps, if any
> Setting pipeline to NULL ...
> /GstPipeline:pipeline0/GstPulseSrc:pulsesrc0.GstPad:src: caps = NULL
> Freeing pipeline ...
>
> The last message makes suggestion to look at the caps, but removing the tee
> element and the autovideosink it works.
>
> Any ideas/suggestions  would be great!!

Have you tried using a queue on each tee branch as is recomended on
tee documentation page?

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-plugins/html/gstreamer-plugins-tee.html#gstreamer-plugins-tee.description

Regards

>
> Thanks all for help!!
> Regards,
> Paulo Paiva
>
>