gstreamer playbin2 gst_element_query_duration fail

[Tim-Philipp Müller]

On Thu, 2013-05-30 at 01:22 +0000, Lelong Tristan-B44337 wrote:

> I am trying to read the duration of a mp3 file in a custom basic player 
> made using playbin2. I noticed that the duration is wrong 
> (99:99:99.999999999) as long as I don't spend a few millisecond in the 
> PLAYING state. Is that normal, and is there an easy way to modify this?
> 
> I am using gstreamer 0.10.35 with gst-plugins-base 0.10.35

This version is almost 2 years old.

In general you should be able to query the duration once the pipeline
has prerolled. However, some parsers may not return a duration estimate
yet unless they've processed a minimum number of frames.

99:99:99.999999999 is how GST_CLOCK_TIME_NONE gets printed in the debug
log. I suspect the duration query returned FALSE.

So yes, may be kind of normal, to reduce the risk of giving completely
bogus duration estimates.

Cheers
 -Tim