[Bug 746035] New: rtpjitterbuffer: buffering mode=slave outputs audio buffers with duplicate pts
GStreamer (GNOME Bugzilla)
bugzilla at gnome.org
Wed Mar 11 07:17:29 PDT 2015
https://bugzilla.gnome.org/show_bug.cgi?id=746035
Bug ID: 746035
Summary: rtpjitterbuffer: buffering mode=slave outputs audio
buffers with duplicate pts
Classification: Platform
Product: GStreamer
Version: git master
OS: Linux
Status: NEW
Severity: normal
Priority: Normal
Component: gst-plugins-good
Assignee: gstreamer-bugs at lists.freedesktop.org
Reporter: nirbheek.chauhan at gmail.com
QA Contact: gstreamer-bugs at lists.freedesktop.org
GNOME version: ---
Created attachment 299099
--> https://bugzilla.gnome.org/attachment.cgi?id=299099&action=edit
Sample rtsp audio stream which yields duplicate timestamps with rtpjitterbuffer
When the attached gdp-payloaded file is run through rtpjitterbuffer, with
mode=slave (the default), the output audio has buffers with duplicate pts, but
not with mode=buffer/synced/none. Those buffers all seem to contain silence
(see bug 746032).
Bad:
gst-launch-1.0 filesrc location=output-gdp-audio.bin ! gdpdepay !
rtpjitterbuffer ! rtpmp4adepay ! decodebin ! ...
Good:
gst-launch-1.0 filesrc location=output-gdp-audio.bin ! gdpdepay !
rtpjitterbuffer mode=buffer ! rtpmp4adepay ! decodebin ! ...
gst-launch-1.0 filesrc location=output-gdp-audio.bin ! gdpdepay !
rtpjitterbuffer mode=synced ! rtpmp4adepay ! decodebin ! ...
gst-launch-1.0 filesrc location=output-gdp-audio.bin ! gdpdepay !
rtpjitterbuffer mode=none ! rtpmp4adepay ! decodebin ! ...
All the incoming packets are sequential and evenly-spaced (captured from
gst-rtsp-server over a link-local network), so in theory there shouldn't be a
"discontinuity" like that.
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