Intrepid Blog » gstreamer http://blog.affien.com A few thoughts Mon, 01 Mar 2010 00:58:01 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 GStreamer: accurate duration http://blog.affien.com/archives/2009/04/19/gstreamer-accurate-duration/ http://blog.affien.com/archives/2009/04/19/gstreamer-accurate-duration/#comments Sun, 19 Apr 2009 13:26:01 +0000 Bas Westerbaan http://blog.affien.com/?p=371 When decoding, for instance, a variable-bitrate MP3, gstreamer reported durations are, to say the least, estimates. I’ve tried to get a better result in a few ways. First off, some files yield a duration tag, but even if you’re lucky and it is there, there are no guaranties about precision. After that I tried seeking to the end (GST_SEEK_END) of the stream and querying the position, which gstreamer didn’t like. Finally, routing the audio into a fakesink, waiting for the end of stream and then querying for the position gives the right result. It’s not the prettiest method, but it works.

This is a Python script that prints the duration of a media to stdout.

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