[gstreamer-bugs] [Bug 541787] New: incorrect timestamp
GStreamer (bugzilla.gnome.org)
bugzilla-daemon at bugzilla.gnome.org
Sun Jul 6 10:39:03 PDT 2008
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GStreamer | gst-plugins-good | Ver: 0.10.17
Summary: incorrect timestamp
Product: GStreamer
Version: 0.10.17
Platform: Other
OS/Version: Linux
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: gst-plugins-good
AssignedTo: gstreamer-bugs at lists.sourceforge.net
ReportedBy: tomasz at grobelny.oswiecenia.net
QAContact: gstreamer-bugs at lists.sourceforge.net
GNOME version: Unspecified
GNOME milestone: Unspecified
In RTP Speex Depayloader (possibly others as well) buffer timestamps are
generated and not taken from RTP packets. In case of packet loss the timestamps
are incorrect. Take for example such a command for sending speech data:
$ gst-launch -v filesrc location=file.mp3 ! mad ! audioconvert ! audioresample
! capsfilter caps="audio/x-raw-int, endianness=(int)1234, signed=(boolean)true,
rate=(int)8000, channels=(int)1" ! speexenc quality=10 ! rtpspeexpay ! udpsink
host=172.16.154.1 port=9011
and for receiving:
$ gst-launch -v udpsrc port=9011 caps="application/x-rtp, clock-rate=(int)8000,
encoding-name=(string)SPEEX" ! rtpspeexdepay ! speexdec ! fakesink
For 10% packet loss and transmission that lasts 5,5 minutes on the receiving
side the last timestamp is 5 minutes. This causes huge problems when I use
alsasink instead of fakesink.
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