Hello Jerry, If I understand correctly your webcam outputs H264 encoded video data ? If yes then you need to make some changes in the v4l2src element, so that it can support h264 caps on the src pad. So your pipeline should look like this /usr/local/bin/.libs/lt-test-launch ( v4l2src device=/dev/video0 always-copy=false ! video/x-h264 ! h264parse ! rtph264pay pt=26 name=pay0 alsasrc device=hw:1,0 ! audioresample ! audio/x-raw-int,channels=2,rate=48000 ! audioconvert ! vorbisenc ! rtpvorbispay pt=97 name=pay1 ) 16200 192.168.1.170 Best Kapil <div class="gmail_quote">On Sun, Apr 3, 2011 at 5:10 PM, Jerry Geis <<a href="mailto:geisj@pagestation.com">geisj@pagestation.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> I am getting this error: ( EOI reached before SOS! see below) 0:00:50.868899000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[37mLOG ^[[00m ^[[00;01;37;44m GST_PROPERTIES gstobject.c:542:gst_object_dispatch_properties_changed:<media-pipeline>^[[00m deep notification from src (caps) 0:00:50.868997000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[36mDEBUG ^[[00m ^[[00;01;34m GST_CAPS gstpad.c:2703:gst_pad_set_caps:<pay0:sink>^[[00m caps 0x2aaaac007140 image/jpeg, framerate=(fraction)30/1, width=(int)1280, heig 0:00:50.869151000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[37mLOG ^[[00m ^[[00;01;37;44m GST_PROPERTIES gstobject.c:542:gst_object_dispatch_properties_changed:<pay0>^[[00m deep notification from sink (caps) 0:00:50.869212000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[37mLOG ^[[00m ^[[00;01;37;44m GST_PROPERTIES gstobject.c:542:gst_object_dispatch_properties_changed:<bin8>^[[00m deep notification from sink (caps) 0:00:50.869275000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[37mLOG ^[[00m ^[[00;01;37;44m GST_PROPERTIES gstobject.c:542:gst_object_dispatch_properties_changed:<media-pipeline>^[[00m deep notification from sink (caps) 0:00:50.869340000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[37mLOG ^[[00m ^[[00;01;35m GST_SCHEDULING gstpad.c:4224:gst_pad_chain_data_unchecked:<pay0:sink>^[[00m calling chainfunction &0x2b91fa01fbc0 0:00:50.869400000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[37mLOG ^[[00m ^[[00m rtpjpegpay gstrtpjpegpay.c:633:gst_rtp_jpeg_pay_handle_buffer:<pay0>^[[00m got buffer size 1012, timestamp 0:00:00.414479667 0:00:50.869451000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[37mLOG ^[[00m ^[[00m rtpjpegpay gstrtpjpegpay.c:642:gst_rtp_jpeg_pay_handle_buffer:<pay0>^[[00m checking from offset 0 0:00:50.869511000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[37mLOG ^[[00m ^[[00m rtpjpegpay gstrtpjpegpay.c:593:gst_rtp_jpeg_pay_scan_marker:^[[00m found 00 marker at offset 927 0:00:50.869558000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[37mLOG ^[[00m ^[[00m rtpjpegpay gstrtpjpegpay.c:642:gst_rtp_jpeg_pay_handle_buffer:<pay0>^[[00m checking from offset 928 0:00:50.869598000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[37mLOG ^[[00m ^[[00m rtpjpegpay gstrtpjpegpay.c:587:gst_rtp_jpeg_pay_scan_marker:^[[00m found EOI marker 0:00:50.869641000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[33;01mWARN ^[[00m ^[[00m rtpjpegpay gstrtpjpegpay.c:666:gst_rtp_jpeg_pay_handle_buffer:<pay0>^[[00m EOI reached before SOS! 0:00:50.869690000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[33;01mWARN ^[[00m ^[[00m rtpjpegpay gstrtpjpegpay.c:851:gst_rtp_jpeg_pay_handle_buffer:<pay0>^[[00m error: Unsupported JPEG 0:00:50.869739000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[36mDEBUG ^[[00m ^[[00;01;37;41m GST_MESSAGE gstelement.c:1834:gst_element_message_full:<pay0>^[[00m start 0:00:50.869878000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[32;01mINFO ^[[00m ^[[00;01;31;47m GST_ERROR_SYSTEM gstelement.c:1865:gst_element_message_full:<pay0>^[[00m posting message: Unsupported JPEG 0:00:50.869964000 ^[[335m17734^[[00m 0x2aaaac00f530 ^[[37mLOG ^[[00m ^[[00;01;37;41m GST_MESSAGE gstmessage.c:184:gst_message_init:^[[00m new message 0x2aaaac006630 0:00:50.870008000 ^[[335m17734^[[00m My command for my H.264 encoded web cam is : /usr/local/bin/.libs/lt-test-launch ( v4l2src device=/dev/video0 always-copy=false ! image/jpeg,width=1280,height=720,framerate=(fraction)30/1 ! rtpjpegpay pt=26 name=pay0 alsasrc device=hw:1,0 ! audioresample ! audio/x-raw-int,channels=2,rate=48000 ! audioconvert ! vorbisenc ! rtpvorbispay pt=97 name=pay1 ) 16200 192.168.1.170 When I use totem to play the camera its about 50/50 if I will get a picture or not. I would think that being a "stream" of data if it cannot decode the stream it would toss a bad frame or packet and wait for one it can decode. If I connect again I'll eventually get a picture again. how/what can I do to reliably connect to the H.264 encoded web cam? Thanks - so much. Jerry _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div> -- <a href="http://www.mediamagictechnologies.com">www.mediamagictechnologies.com</a> (Gstreamer, ffmpeg, Red5, Streaming) twitter handle: @gst_kaps <a href="http://www.linkedin.com/in/kapilagrawal">http://www.linkedin.com/in/kapilagrawal</a>