SETUP: So, I have two sender trying to send video from two different devices. I have synced the clocks of both the senders through NTPD daemon. Then I tried executing this pipeline based on the insights from Streamer conference videos and few posts in this forum. I am basically assuming here that the pipeline is going to the use the NTP clock. External clock sync is all I need to do before I implement this. Please correct me if I am wrong. At the receiver I put both streams into a common RTPbin.
PROBLEM: I am not getting the expected results. The frames are stuck most of the time or out of sync. Please let me know where I am going wrong. I am not exactly sure on where I have to use the Test-Netclocck examples. I thought that was a substitute for NTP daemon based syncing.
I would be really happy if I could get a pipeline based solution. I am not very familiar with the C API.
The pipeline of both senders look like this
SENDER PIPELINE:VOFFSET=0
AOFFSET=0
VELEM="v4l2src device=/dev/video1"
VCAPS="video/x-raw,width=352,height=288,framerate=15/1"
VSOURCE="$VELEM ! queue ! videorate ! videoconvert ! $VCAPS"
VENC="vp8enc ! rtpvp8pay"
VRTPSINK="udpsink port=5000 host=$DEST ts-offset=$VOFFSET name=vrtpsink"
VRTCPSINK="udpsink port=5001 host=$DEST sync=false name=vrtcpsink"
VRTCPSRC="udpsrc port=5005 name=vrtpsrc"
gst-launch-1.0 -v rtpbin name=rtpbin ntp-time-source=clock-time \
$VSOURCE ! $VENC ! rtpbin.send_rtp_sink_0 \
rtpbin.send_rtp_src_0 ! $VRTPSINK \
rtpbin.send_rtcp_src_0 ! $VRTCPSINK \
$VRTCPSRC ! rtpbin.recv_rtcp_sink_0
RECEIVER PIPELINE:
VIDEO_CAPS="application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)VP8"
VIDEO_CAPS2="application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)VP8"
VIDEO_DEC="rtpvp8depay ! vp8dec"
VIDEO_DEC2="rtpvp8depay ! vp8dec"
VIDEO_SINK="videoconvert ! autovideosink"
VIDEO_SINK2="videoconvert ! autovideosink"
gst-launch-1.0 -v rtpbin name=rtpbin ntp-time-source=clock-time ntp-sync=true buffer-mode=synced rtcp-sync-send-time=false\
udpsrc caps=$VIDEO_CAPS port=5000 ! rtpjitterbuffer mode=synced ! rtpbin.recv_rtp_sink_0 \
rtpbin. ! $VIDEO_DEC ! $VIDEO_SINK \
udpsrc port=5001 ! rtpbin.recv_rtcp_sink_0 \
rtpbin.send_rtcp_src_0 ! udpsink port=5005 host=$DEST sync=false \
udpsrc caps=$VIDEO_CAPS2 port=6000 ! rtpjitterbuffer mode=synced ! rtpbin.recv_rtp_sink_1 \
rtpbin. ! $VIDEO_DEC2 ! $VIDEO_SINK2 \
udpsrc port=6001 ! rtpbin.recv_rtcp_sink_1 \
rtpbin.send_rtcp_src_1 ! udpsink port=6005 host=$DEST2 sync=false
Thank you for your time,
Thiyagesh
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