Hello everyone:
I want to receive and play the IPTV muticast stream(H264 TS stream
based on rtp.) with udpsrc,When I use
"tcpdump -i eth0" ,I get the following infor :
09:11:55.138926 IP 61.181.150.102.12502 > 225.1.2.2.8034: UDP, length 1348
09:11:55.142901 IP 61.181.150.102.12502 > 225.1.2.2.8034: UDP, length 1348
09:11:55.146890 IP 61.181.150.102.12502 > 225.1.2.2.8034: UDP, length 1348
09:11:55.150871 IP 61.181.150.102.12502 > 225.1.2.2.8034: UDP, length 1348
09:11:55.154911 IP 61.181.150.102.12502 > 225.1.2.2.8034: UDP, length 1348
09:11:55.160492 IP 61.181.150.102.12502 > 225.1.2.2.8034: UDP, length 1348
09:11:55.164337 IP 61.181.150.102.12502 > 225.1.2.2.8034: UDP, length 1348
But When I use ：
gst-launch -v gstrtpbin name=rtpbin udpsrc caps="application/x-rtp, \
media=(string)video, clock-rate=(int)90000, encoding-name=(string)MP2T-ES, \
ssrc=(guint)1253787951, payload=(int)33, clock-base=(guint)3847989125, \
seqnum-base=(guint)25200" multicast-group=225.1.2.10 port=8050 ! \
rtpbin.recv_rtp_sink_0 rtpbin. ! rtpmp2tdepay ! mpegtsdemux name=d ! queue \
! ffdec_h264 ! ffmpegcolorspace ! videoscale ! queue ! xvimagesink
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
---------Stop here,can't get anything.But VLC on windows can receive an play the stream. According to Wim Taymans‘s suggestion in the forum,
I use the only Command:"gst-launch-0.10 udpsrc multicast-group=225.1.2.2 port=8034 ... ! fakesink -v "
to test the udpsrc plugin,I still can't get anything,and still stop at:
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
So which reasons will result udpsrc can't get anything but tcpdump or VLC can ? And if the length of UDP layer in the stream package
was 1328 (not 1348),then I can get and play the stream with udpsrc,Why will this ?
More detailed information can find at the following link:
http://gstreamer-devel.966125.n4.nabble.com/How-to-play-IPTV-streamer-by-udpsrc-td4632303.html#a4632425
Thanks very much.
Regards. zhichao.
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