[Bug 763870] concat, cdparanoiasrc: silence gap 500ms between two tracks

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=763870

--- Comment #8 from Topolsky <otopolsky at gmail.com> ---
Found out that when using audiomixer after concat (before alsasink) with
combination of using queue before audiomixer the gap is not there.

I suspect that after switching to second track the timestamp of buffers(or
maybe its caused by segment event new time segment) is changed to 0:00 which
maybe triggers some bug/logic in ringbuffer.

I also had to shorten the ringbuffer (buffer-time of alsasink) in order to not
cut-off the end of track2.

This is the working pipeline:
gst-launch-1.0 concat name=c cdparanoiasrc read-speed=2 paranoia-mode=0 track=1
! queue name=cd1 max-size-time=120000000000 ! c. cdparanoiasrc track=2
read-speed=2 paranoia-mode=0 ! queue name=cd2 max-size-time=120000000000 ! c.
c. ! audiomixer ! audioconvert dithering=0 ! audioresample quality=0 ! queue
max-size-time=120000000000 ! alsasink buffer-time=20000 sync=false

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