[gst-devel] Trouble playing a-Law encoded file over RTP/UDP

[Philipp Leibfried]

Hello everyone,

first of all, thanks for the prompt and enlightening answer  to my last question pertaining to GMainLoop and GStreamer.

I'm currently trying to send an a-Law encoded file over RTP and playing it back.
The sender pipeline is setup as follows:

gst-launch-0.10 filesrc location=/home/pl/Projects/gstSender/debug/src/2079.wav do-timestamp=true ! rtppcmapay max-ptime=20000000 ! udpsink host="localhost" port=4044 

Before I started using "do-timestamp", sending took only a few seconds, also the file takes about 40 seconds to play back. Now, sending takes about as long as it takes to play back the file, so I guess everything sould be alright on this end(?)

The receiver pipeline is as follows:

gst-launch-0.10 udpsrc port=4044 ! gstrtpjitterbuffer ! rtppcmadepay ! alawdec ! alsasink

After a long long time, I start getting messages such as this:

gstbaseaudiosink.c(1188): gst_base_audio_sink_render (): /pipeline0/alsasink0:
Unexpected discontinuity in audio timestamps of more than half a second (0:02:08.225125000), resyncing
WARNING: from element /pipeline0/alsasink0: Compensating for audio synchronisation problems

And sporadically, I can hear very short bits of the audio (maybe a 10th of a second).

What am I missing here? 

Regards and TIA
-Philipp Leibfried

Speech Design GmbH
82110 Germering
Germany
www.speech-design.de




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