Why does adding ! audiorate screw up audio?

[Tom Gibson]

I'm still a bit stuck on this problem.  Could someone help me figure
out where the problem is and if it's a bug in the audiorate or decode
elements?

I uploaded my test flv file which demonstrates the problem.  You can
download it from:
http://www.4shared.com/video/RekJLrXr/tone-clips.html

The following cmdline should play the audio fine:

gst-launch-0.10 uridecodebin name=d uri=file:///tmp/tone-clips.flv !
autoaudiosink

Modifying it slightly by adding an audiorate element causes the audio
to sound bad.  Here is the cmdline that produces a problem:

gst-launch-0.10 uridecodebin name=d uri=file:///tmp/tone-clips.flv !
audiorate ! autoaudiosink


Thanks,

Tom


On Mon, Jan 31, 2011 at 12:10 PM, Tom G <tomwg123 at gmail.com> wrote:
> Hello,
>
> I'm fairly new to g-streamer and have been unable to understand why
> the audio in my pipeline outputs poorly if I add ! audiorate.  I can
> reproduce with a very simple gst-launch command line.
>
> gst-launch filesrc location=/tmp/test.flv ! decodebin ! audiorate !
> autoaudiosink
>
> That produces audio output that has a constant clicking sound in the
> background.  If I remove the ! audiorate element, then it sounds
> perfect.
>
> I started working with an existing pipeline that somebody else
> designed and am not even confident I should be using the audiorate
> element since the normal (non-debug) pipeline outputs to an mpegts.
> Why would it screw things up though?  I would have expected the input
> audio to already be like a perfect stream and for it to output looking
> the same as on input.
>
> Any help is appreciated.
>
> -Tom
>
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