vp8enc fails to initialise in RTP pipeline

Tony Devtalk devtalk101 at gmail.com
Sat Jan 26 08:12:05 PST 2013


Hi

I'm trying to use GStreamer to perform H264/VP8 transcoding in an existing
RTP proxy. I am first attempting to prototype the pipelines I think I will
need with gst-launch.

Performing a straight-forward transcoding using a single pipeline works:

gst-launch-1.0 videotestsrc !
video/x-raw,width=320,height=240,framerate=30/1 ! x264enc ! avdec_h264 !
vp8enc ! vp8dec ! videoconvert ! xvimagesink

However, when I try to use RTP, the transcoding fails because the VP8
encoder fails to initialise:

ERROR: from element /GstPipeline:pipeline0/GstVP8Enc:vp8enc0: Failed to
initialize encoder
Additional debug info:
gstvp8enc.c(1543): gst_vp8_enc_set_format ():
/GstPipeline:pipeline0/GstVP8Enc:vp8enc0:
invalid parameter

It is not clear which parameter the message "invalid parameter" is
referring to as I do not explicitly set any parameters on the vp8enc
element.

I can't figure out why this doesn't work with my RTP pipelines. Any help
that can be offered would be much appreciated...

My environment:
- Ubuntu 12.04
- GStreamer 1.0.5 obtained from ppa:gstreamer-developers/ppa

The GStreamer RTP prototype in which the error is occurring consists of
three scripts:

* sender.sh - Generates video from videotestsrc element, encodes as H264,
sends as RTP to transcoder.

* transcoder.sh - Simulates the transcoding that will be performed by the
RTP Proxy. It receives the RTP from sender, decodes the H264, encodes into
VP8 and sends it to the receiver via RTP.

* receiver.sh - This receives the RTP video, decodes the VP8 and plays the
video in a window.

These three scripts are executed on the same machine and launched in
sequence by another script, run.sh, which redirects stdout/stderr to
corresponding .out files.

The run.sh Script
~~~~~~~~~~~~~~~~~

# delete old output files
rm -f *.out

# start sender and wait for initialisation (so transcoder can grab output
rtp caps)
echo Starting sender
./sender.sh &> sender.out &
sleep 5s

# start transcoder and wait for initialisation (so receiver can grab output
rtp caps)
echo Starting transcoder
./transcoder.sh &> transcoder.out &
sleep 5s

# start the receiver
echo Starting receiver
./receiver.sh &> receiver.out &

# kill gst-launch processes when finished
read -p "Press RETURN to stop..."
pkill gst-launch
echo Finished.

The sender.sh Script
~~~~~~~~~~~~~~~~~~~~

gst-launch-1.0 -v rtpbin name=rtpbin_sender \
videotestsrc ! video/x-raw,width=320,height=240,framerate=30/1 !
videoconvert ! x264enc tune=zerolatency speed-preset=ultrafast ! rtph264pay
! rtpbin_sender.send_rtp_sink_0 \
rtpbin_sender.send_rtcp_src_0 ! udpsink name=udpsink_rtcp port=5001
host=127.0.0.1 sync=false async=false \
rtpbin_sender.send_rtp_src_0 ! udpsink name=udpsink_rtp port=5000
host=127.0.0.1 ts-offset=0

The transcoder.sh Script
~~~~~~~~~~~~~~~~~~~~~~~~

# grab the rtp caps of the rtp source pad of the sender script
senderRtpCaps=`egrep -m 1
"rtpbin_sender.GstGhostPad:send_rtp_src_0.GstProxyPad.*" sender.out | egrep
-o "application/x-rtp.*"`
echo Using sender RTP CAPS: $senderRtpCaps

gst-launch-1.0 -v rtpbin name=rtpbin_receiver rtpbin name=rtpbin_sender \
udpsrc name=udpsrc_rtcp port=5001 caps = "application/x-rtcp" !
rtpbin_receiver.recv_rtcp_sink_0 \
udpsrc name=udpsrc_rtp port=5000 caps = "${senderRtpCaps}" !
rtpbin_receiver.recv_rtp_sink_0 \
rtpbin_receiver. ! rtph264depay ! avdec_h264 ! vp8enc ! rtpvp8pay !
rtpbin_sender.send_rtp_sink_0 \
rtpbin_sender.send_rtcp_src_0 ! udpsink name=udpsink_rtcp port=5101
host=127.0.0.1 sync=false async=false \
rtpbin_sender.send_rtp_src_0 ! udpsink name=udpsink_rtp port=5100
host=127.0.0.1 ts-offset=0

The receiver.sh Script
~~~~~~~~~~~~~~~~~~~~~~

# grab the rtp caps of the rtp source pad of the transcoder script
transcoderRtpCaps=`egrep -m 1 "rtpbin_sender.GstGhostPad:send_rtp_src_0:
caps =.*" transcoder.out | egrep -o "application/x-rtp.*"`
echo Using transcoder RTP CAPS: $transcoderRtpCaps

gst-launch-1.0 rtpbin name=rtpbin_receiver \
udpsrc name=udpsrc_rtcp port=5101 caps = "application/x-rtcp" !
rtpbin_receiver.recv_rtcp_sink_0 \
udpsrc name=udpsrc_rtp port=5100 caps = "${transcoderRtpCaps}" !
rtpbin_receiver.recv_rtp_sink_0 \
rtpbin_receiver. ! rtpvp8depay ! vp8dec ! xvimagesink

The sender.out file output by sender.sh:

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0.GstPad:src: caps =
video/x-raw, format=(string)I420, width=(int)320, height=(int)240,
framerate=(fraction)30/1
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps =
video/x-raw, format=(string)I420, width=(int)320, height=(int)240,
framerate=(fraction)30/1
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:src: caps =
video/x-raw, format=(string)I420, width=(int)320, height=(int)240,
framerate=(fraction)30/1
/GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:sink: caps = video/x-raw,
format=(string)I420, width=(int)320, height=(int)240,
framerate=(fraction)30/1
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:sink: caps =
video/x-raw, format=(string)I420, width=(int)320, height=(int)240,
framerate=(fraction)30/1
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps =
video/x-raw, format=(string)I420, width=(int)320, height=(int)240,
framerate=(fraction)30/1
Redistribute latency...
/GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:src: caps = video/x-h264,
codec_data=(buffer)0142c015ffe100166742c015da0507ec0440000003004000000f23c58ba801000468ce3c80,
stream-format=(string)avc, alignment=(string)au, level=(string)2.1,
profile=(string)constrained-baseline, width=(int)320, height=(int)240,
pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0.GstPad:src: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender.GstGhostPad:send_rtp_sink_0.GstProxyPad:proxypad0:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender/GstRtpSession:rtpsession0.GstPad:send_rtp_src:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender.GstGhostPad:send_rtp_src_0:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstUDPSink:udpsink_rtp.GstPad:sink: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender.GstGhostPad:send_rtp_src_0.GstProxyPad:proxypad1:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender/GstRtpSession:rtpsession0.GstPad:send_rtp_sink:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender.GstGhostPad:send_rtp_sink_0:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0.GstPad:sink: caps =
video/x-h264,
codec_data=(buffer)0142c015ffe100166742c015da0507ec0440000003004000000f23c58ba801000468ce3c80,
stream-format=(string)avc, alignment=(string)au, level=(string)2.1,
profile=(string)constrained-baseline, width=(int)320, height=(int)240,
pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0: timestamp = 551299522
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0: seqnum = 56555
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender/GstRtpSession:rtpsession0.GstPad:send_rtcp_src:
caps = application/x-rtcp
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender.GstGhostPad:send_rtcp_src_0:
caps = application/x-rtcp
/GstPipeline:pipeline0/GstUDPSink:udpsink_rtcp.GstPad:sink: caps =
application/x-rtcp
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender.GstGhostPad:send_rtcp_src_0.GstProxyPad:proxypad2:
caps = application/x-rtcp
/GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:src: caps = video/x-h264,
codec_data=(buffer)0142c015ffe100166742c015da0507ec0440000003004000000f23c58ba801000468ce3c80,
stream-format=(string)avc, alignment=(string)au, level=(string)2.1,
profile=(string)constrained-baseline, width=(int)320, height=(int)240,
pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0.GstPad:src: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender.GstGhostPad:send_rtp_sink_0.GstProxyPad:proxypad0:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender/GstRtpSession:rtpsession0.GstPad:send_rtp_src:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender.GstGhostPad:send_rtp_src_0:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstUDPSink:udpsink_rtp.GstPad:sink: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender.GstGhostPad:send_rtp_src_0.GstProxyPad:proxypad1:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender/GstRtpSession:rtpsession0.GstPad:send_rtp_sink:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender.GstGhostPad:send_rtp_sink_0:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0.GstPad:sink: caps =
video/x-h264,
codec_data=(buffer)0142c015ffe100166742c015da0507ec0440000003004000000f23c58ba801000468ce3c80,
stream-format=(string)avc, alignment=(string)au, level=(string)2.1,
profile=(string)constrained-baseline, width=(int)320, height=(int)240,
pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1
./sender.sh: line 4:  4157 Terminated              gst-launch-1.0 -v rtpbin
name=rtpbin_sender videotestsrc !
video/x-raw,width=320,height=240,framerate=30/1 ! videoconvert ! x264enc
tune=zerolatency speed-preset=ultrafast ! rtph264pay !
rtpbin_sender.send_rtp_sink_0 rtpbin_sender.send_rtcp_src_0 ! udpsink
name=udpsink_rtcp port=5001 host=127.0.0.1 sync=false async=false
rtpbin_sender.send_rtp_src_0 ! udpsink name=udpsink_rtp port=5000
host=127.0.0.1 ts-offset=0

The transcoder.out file output by transcoder.sh (contains the "Failed to
initialize encoder" error):

Using sender RTP CAPS: application/x-rtp, media=(string)video,
clock-rate=(int)90000, encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
/GstPipeline:pipeline0/GstUDPSrc:udpsrc_rtcp.GstPad:src: caps =
application/x-rtcp
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver.GstGhostPad:recv_rtcp_sink_0.GstProxyPad:proxypad0:
caps = application/x-rtcp
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpSession:rtpsession0.GstPad:sync_src:
caps = application/x-rtcp
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpSsrcDemux:rtpssrcdemux0.GstPad:rtcp_sink:
caps = application/x-rtcp
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpSession:rtpsession0.GstPad:recv_rtcp_sink:
caps = application/x-rtcp
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver.GstGhostPad:recv_rtcp_sink_0:
caps = application/x-rtcp
/GstPipeline:pipeline0/GstUDPSrc:udpsrc_rtp.GstPad:src: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver.GstGhostPad:recv_rtp_sink_0.GstProxyPad:proxypad1:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpSession:rtpsession0.GstPad:recv_rtp_src:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
Setting pipeline to PLAYING ...
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpSsrcDemux:rtpssrcdemux0.GstPad:sink:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpSession:rtpsession0.GstPad:recv_rtp_sink:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver.GstGhostPad:recv_rtp_sink_0:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
New clock: GstSystemClock
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender/GstRtpSession:rtpsession1.GstPad:send_rtcp_src:
caps = application/x-rtcp
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender.GstGhostPad:send_rtcp_src_0:
caps = application/x-rtcp
/GstPipeline:pipeline0/GstUDPSink:udpsink_rtcp.GstPad:sink: caps =
application/x-rtcp
/GstPipeline:pipeline0/GstRtpBin:rtpbin_sender.GstGhostPad:send_rtcp_src_0.GstProxyPad:proxypad4:
caps = application/x-rtcp
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpJitterBuffer:rtpjitterbuffer0.GstPad:src:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpPtDemux:rtpptdemux0.GstPad:sink:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpJitterBuffer:rtpjitterbuffer0.GstPad:sink:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstUDPSrc:udpsrc_rtp.GstPad:src: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver.GstGhostPad:recv_rtp_sink_0.GstProxyPad:proxypad1:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpSession:rtpsession0.GstPad:recv_rtp_src:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpSsrcDemux:rtpssrcdemux0.GstPad:src_444445276:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpJitterBuffer:rtpjitterbuffer0.GstPad:src:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpPtDemux:rtpptdemux0.GstPad:sink:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpJitterBuffer:rtpjitterbuffer0.GstPad:sink:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpSsrcDemux:rtpssrcdemux0.GstPad:sink:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver/GstRtpSession:rtpsession0.GstPad:recv_rtp_sink:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver.GstGhostPad:recv_rtp_sink_0:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver.GstGhostPad:recv_rtp_src_0_444445276_96:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpH264Depay:rtph264depay0.GstPad:src: caps =
video/x-h264, stream-format=(string)avc, alignment=(string)au,
codec_data=(buffer)0142c015ffe100166742c015da0507ec0440000003004000000f23c58ba801000468ce3c80
/GstPipeline:pipeline0/avdec_h264:avdec_h264-0.GstPad:sink: caps =
video/x-h264, stream-format=(string)avc, alignment=(string)au,
codec_data=(buffer)0142c015ffe100166742c015da0507ec0440000003004000000f23c58ba801000468ce3c80
/GstPipeline:pipeline0/GstRtpH264Depay:rtph264depay0.GstPad:sink: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/GstRtpBin:rtpbin_receiver.GstGhostPad:recv_rtp_src_0_444445276_96.GstProxyPad:proxypad5:
caps = application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264,
sprop-parameter-sets=(string)"Z0LAFdoFB+wEQAAAAwBAAAAPI8WLqA\=\=\,aM48gA\=\=",
ssrc=(uint)444445276, payload=(int)96, timestamp-offset=(uint)551299522,
seqnum-offset=(uint)56555
/GstPipeline:pipeline0/avdec_h264:avdec_h264-0.GstPad:src: caps =
video/x-raw, format=(string)I420, width=(int)320, height=(int)240,
pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive,
colorimetry=(string)bt601, framerate=(fraction)0/1
/GstPipeline:pipeline0/GstVP8Enc:vp8enc0.GstPad:sink: caps = video/x-raw,
format=(string)I420, width=(int)320, height=(int)240,
pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive,
colorimetry=(string)bt601, framerate=(fraction)0/1
/GstPipeline:pipeline0/avdec_h264:avdec_h264-0.GstPad:src: caps =
video/x-raw, format=(string)I420, width=(int)320, height=(int)240,
pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive,
colorimetry=(string)bt601, framerate=(fraction)0/1
/GstPipeline:pipeline0/GstVP8Enc:vp8enc0.GstPad:sink: caps = video/x-raw,
format=(string)I420, width=(int)320, height=(int)240,
pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive,
colorimetry=(string)bt601, framerate=(fraction)0/1
ERROR: from element /GstPipeline:pipeline0/GstVP8Enc:vp8enc0: Failed to
initialize encoder
Additional debug info:
gstvp8enc.c(1543): gst_vp8_enc_set_format ():
/GstPipeline:pipeline0/GstVP8Enc:vp8enc0:
invalid parameter
Execution ended after 227794877 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...

The receiver.out file output by receiver.sh (fails due to transcoder.sh
failure):

Using transcoder RTP CAPS:
WARNING: erroneous pipeline: could not set property "caps" in element
"udpsrc_rtp" to "!"

Thanks,
Tony.
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