[gstreamer-bugs] [Bug 547075] New: [speex] Encoder doesn't handle non-zero start timestamps and discontinuities properly
bugzilla-daemon at bugzilla.gnome.org
Sat Aug 9 07:48:16 PDT 2008
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GStreamer | gst-plugins-good | Ver: HEAD CVS
Summary: [speex] Encoder doesn't handle non-zero start timestamps
and discontinuities properly
Version: HEAD CVS
AssignedTo: gstreamer-bugs at lists.sourceforge.net
ReportedBy: slomo at circular-chaos.org
QAContact: gstreamer-bugs at lists.sourceforge.net
GNOME version: Unspecified
GNOME milestone: Unspecified
the speex encoder (and also the celt encoder which is more or less the same
code) doesn't handle non-zero start timestamps and discontinuities properly. It
simply starts to count at 0 and ignores all upstream timestamps.
This can lead to a/v synchronization issues when muxing together with video.
The fix for this is probably to a) get the start timestamp and offset all
timestamps and granulepos with that and b) if a discontinuity is detected
encode everything in the GstAdapter (if necessary add some silence) and then
continue to encode the discont buffer and all following with the new
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