Thanks a lot Wim. The stuff worked. Deeptendu <div>On 8/11/06, Wim Taymans <<a href="mailto:wim@fluendo.com">wim@fluendo.com</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> On Fri, 2006-08-11 at 11:25 +0530, Deeptendu Bikash wrote: Hi, > Problem 1) > I am trying to stream MPEG-4 video (MP4V-ES) using RTP. On the sender > side I give: > gst-launch videotestsrc ! ffenc_mpeg4 ! rtpmp4vpay ! udpsink port = > 1234 > This is producing packets as can be seen from Ethereal packet capture. > On decoding the packet as RTP, I can see the payload typ as 96. > > On the sender side I type: > gst-launch udpsrc port=1234 ! > application/x-rtp,clock-rate=90000,pt=96 ! rtpmp4vdepay ! > ffdec_mpeg4 ! xvimagesink <snip> This should becoma FAQ. For RTP streaming there is a lot of info that needs to be passed to the receiver using some out-of-band mechanism such as SDP. In GStreamer there is a mapping from SDP to GstCaps defined. The proper procedure to set up an RTP streaming session is: On the sender:   gst-launch -v videotestsrc ! ffenc_mpeg4 ! rtpmp4vpay ! udpsink port = 1234 You need the -v option so that you can see the caps set on the sinkp pad of udpsink. This will then result in output like this: Setting pipeline to PAUSED ... /pipeline0/videotestsrc0.src: caps = video/x-raw-yuv, format=(fourcc)I420, width=(int)320, height=(int)240, framerate=(fraction)30/1 Pipeline is PREROLLING ... /pipeline0/ffenc_mpeg40.src: caps = video/mpeg, width=(int)320, height=(int)240, framerate=(fraction)30/1, mpegversion=(int)4, systemstream=(boolean)false /pipeline0/ffenc_mpeg40.sink: caps = video/x-raw-yuv, format=(fourcc)I420, width=(int)320, height=(int)240, framerate=(fraction)30/1 /pipeline0/rtpmp4vpay0.sink: caps = video/mpeg, width=(int)320, height=(int)240, framerate=(fraction)30/1, mpegversion=(int)4, systemstream=(boolean)false /pipeline0/rtpmp4vpay0.src: caps = application/x-rtp, media=(string)video, payload=(int)96, clock-rate=(int)90000, encoding-name=(string)MP4V-ES, ssrc=(guint)3197754544, clock-base=(guint)1459048008, seqnum-base=(guint)46431, profile-level-id=(string)1, config=(string)000001b001000001b58913000001000000012000c48d8800f6185020f0a21f000001b24c61766335312e392e30 /pipeline0/udpsink0.sink: caps = application/x-rtp, media=(string)video, payload=(int)96, clock-rate=(int)90000, encoding-name=(string)MP4V-ES, ssrc=(guint)3197754544, clock-base=(guint)1459048008, seqnum-base=(guint)46431, profile-level-id=(string)1, config=(string)000001b001000001b58913000001000000012000c48d8800f6185020f0a21f000001b24c61766335312e392e30 Pipeline is PREROLLED ... Setting pipeline to PLAYING ... New clock: GstSystemClock Now look at the caps set on /pipeline0/udpsink0.sink. These caps are typically converted to an SDP message and send to the receiver when a connection is made. We are not doing any session setup here, just connecting to the raw RTP stream so we need another way of getting this info to the receiver. We simply copy the caps over. Then on the receiver you do: gst-launch udpsrc port=1234 caps="application/x-rtp, media=(string)video, payload=(int)96, clock-rate=(int)90000, encoding-name=(string)MP4V-ES, ssrc=(guint)3197754544, clock-base=(guint)1459048008, seqnum-base=(guint)46431, profile-level-id=(string)1, config=(string)000001b001000001b58913000001000000012000c48d8800f6185020f0a21f000001b24c61766335312e392e30" ! rtpmp4vdepay ! ffdec_mpeg4 ! xvimagesink This will then stream the video. Notice how you need to inform the receiver of the required properties as defined by RFC 3016 by using the same GstCaps as seen on the sender. > ----------------------- > Problem 2) > Instead of using the videotestsrc, I am trying to use an existing > MPEG-4 video elementary stream. Here I get a problem on the sender > side itself. My command is: > gst-launch filesrc location= test.m4v ! rtpmp4vpay ! > application/x-rtp,clock-rate=90000 ! udpsink port = 1234 > Setting pipeline to PAUSED ... > Pipeline is PREROLLING ... > ERROR: from element /pipeline0/rtpmp4vpay0: Element doesn't implement > handling of this stream. Please file a bug. > Additional debug info: > gstbasertppayload.c(420): gst_basertppayload_push > (): /pipeline0/rtpmp4vpay0: > subclass did not specify clock_rate > ERROR: pipeline doesn't want to preroll. > Setting pipeline to NULL ... > FREEING pipeline ... I have no idea what that test.m4v is. We currently don't handle parsing of arbitrary elementary mpeg4 video streams, though. For streaming of MPEG4 video in an ISO container you would do the following: gst-launch -v filesrc location=~/data/sincity.mp4 ! qtdemux ! rtpmp4vpay ! udpsink port = 1234 then grab the caps set on the udpsink and start the receiver with the same caps as in the first example. Hope this helps. Wim > > Can you please help me out? > > Thanks, > Deeptendu. </blockquote></div>