Gstreamer AVNU Stdin Stdout Streaming doubt

[christy_jp]

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[Arjen Veenhuizen]

You will have to tell the receiving end what kind of stream it is receiving. Assuming default videotestsrc settings, its caps will be something like "video/x-raw,format=I420,width=320,height=240,framerate=(fraction)25/1,pixel-aspect-ratio=(fraction)1/1".
In that case, your receiving pipeline should read something like (untested):

/listener eth3 1024 | gst-launch-1.0 fdsrc fd=0 ! queue ! rawvideoparse format=I420 width=320 height=240 framerate=25/1 ! queue ! autovideosink

Note that setting sync=false is hardly ever a good solution.

[christy_jp]

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[christy_jp]

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[Arjen Veenhuizen]

I checked your pipelines and they indeed will not work:
You sender pipeline:

gst-launch-1.0 --gst-debug=*:2 -v uridecodebin uri=file:/mnt/ssd/Serenity_Trailer.mp4 caps="video/x-h264" ! h264parse ! video/x-h264,stream-format=byte-stream ! rtph264pay ! fdsink fd=1 | ./talker eth0 1024

is missing a demultiplexer element, e.g. qtdemux:

gst-launch-1.0 --gst-debug=*:2 -vm uridecodebin uri=file:/mnt/ssd/Serenity_Trailer.mp4 ! qtdemux ! h264parse ! video/x-h264,stream-format=byte-stream ! rtph264pay ! fdsink fd=1 | ./talker eth0 1024

When running this pipeline, as said before, you will find the correct application/x-rtp caps shown at stdout. You have to copy these caps over to the receiver pipeline. Otherwise, the receiver pipeline has no means to figure out what it is receiving.

./listener eth3 1024 | gst-launch-1.0 --gst-debug=*:2 -v fdsrc fd=0 ! capsfilter caps="application/x-rtp, ....." ! rtpjitterbuffer latency=200 ! rtph264depay ! decodebin ! videoconvert ! autovideosink

Btw, you could have used gst-inspect-1.0 fdsrc to see that fdsrc does not have a caps property.

Example of rtp h264 caps:
"application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, packetization-mode=(string)1, profile-level-id=(string)42c01e, sprop-parameter-sets=(string)"Z0LAHtwLQ9sBEAAAAwAQAAADAyhA\,aM48gA\=\=", payload=(int)96, ssrc=(uint)2323517954, timestamp-offset=(uint)2162767804, seqnum-offset=(uint)16555, a-framerate=(string)25"

[christy_jp]

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