[Bug 651438] Sound hiccups occasionally in Banshee and Totem

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=651438
  GStreamer | don't know | 0.10.34

--- Comment #9 from Vincent Penquerc'h <vincent.penquerch at collabora.co.uk> 2011-08-12 18:24:57 UTC ---
This file shows granpos mostly following decoded samples, but has a gap from
time to time that stays constant over a short time before syncing again.
The first gap is about 31 ms, appears at around 7.8 seconds, and disappears at
around 8.2 seconds.
This is not enough to trigger the discontinuity in the base audio sink code,
but it you listen carefully you can hear the music get out of step.
The second gap is about 51 ms, appears at around 17.5 seconds, and disappears
at around 18 seconds.
This is the one you mentioned, and it triggers the discontinuity, giving an
audible pop.
There are various others along the file, with increasing magnitude, reaching
103ms near the end of the file.

As an experiment, I changed the timing of the buffers from the timestamps given
by the container to an artificial one calculated from the number of decoded
samples (aka a perfect timestamp) and playback does not suffer from the pops.

I think this file was muxed by a buggy muxer. It should be possible to rewrite
it with saner granpos losslessly though, as only the granpos seems to suffer
from an intermittent offset.

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