[gst-devel] Why audio extract on flv won't preroll?

Shawn McMurdo shawn_mcmurdo at yahoo.com
Thu Sep 17 01:47:14 CEST 2009

Nobody knows?
Can anyone at least comment on whether my pipeline is correct?

From: Shawn McMurdo <shawn_mcmurdo at yahoo.com>
To: Gstreamer Devel <gstreamer-devel at lists.sourceforge.net>
Sent: Monday, September 14, 2009 5:19:13 PM
Subject: [gst-devel] Why audio extract on flv won't preroll?

I am trying to do an audio extract on various types of videos.

Using decodebin as shown below on this video:
causes gstreamer to hang in the preroll.

The same pipeline works on other flvs and wmvs.
Can anyone explain why this is happening?

I am running gstreamer 0.10.24 on Fedora 11 (
The pipeline I am using is:
gst-launch-0.10 -m -t -v filesrc location=$1 ! decodebin ! audioconvert ! audio/x-raw-int,channels=1,width=16,depth=16 ! audioresample ! audio/x-raw-int,rate=16000 ! wavenc ! filesink location=$1.wav

The output from running this pipeline is:

BTW, decodebin2 works on this file but seems to have trouble with other files.
Any explanations or pointer appreciated.

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