forwarded screen stutters every several seconds

[henryco]

I find it difficult to find gstreamer information because there are plenty of
webpages where people are happy to explain all they have understood about
gstreamer ... but i dont find the official gstreamer doc with all the
details...
for instance for the buffer-size this page does not give any info about the
units and if i set it to maximum 100K (is that buffer-size=100000) it seems
that i'm well below the performances that i get with the system wide
modification of net.core.rmem_max ... and no idea why


http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-udpsrc.html

Also trying for the sound what i achieved for the image i met some problems:
i gave up vorbis (apparantly the best ) because it requires to copy paste a
huge caps each time ... then in mp3 the performances are not satisfactory
(bad sound quality) with the following pipelines

gst-launch-1.0 -v pulsesrc ! lamemp3enc quality=10
encoding-engine-quality=fast ! rtpmpapay 
! udpsink host=192.168.1.19 port=5500
gst-launch-1.0 -v udpsrc port=5500 caps="application/x-rtp,
media=(string)audio, clock-rate=(int)90000, encoding-name=(string)MPA,
payload=(int)96" ! rtpmpadepay ! queue ! mpegaudioparse ! mpg123audiodec !
audioconvert ! alsasink

so if you have a good advice : coder and parameters to choose for the sound
toward Pi to minimize latency and get an acceptable quality on the LAN,
thank you.

I also tried to forward the sound between pulseaudio and pulseaudio directly
(using paprefs) and it's good, ... until the image is also transfered in
parallel : then performances drop down for both which is disapointing
because i thought that the image treated by the gpu would not interfere
destructively with the sound (cpu) on the Pi...

you might have guessed that what i'm trying to do (pedagogical purpose) is
to build a kind of home made thin client with full HD capability for the
Pi... 




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