[gst-devel] Playbin2 with file whose length changes

[Jeffrey Barish]

Philippe Normand wrote:
> On Tue, 2010-01-19 at 17:37 +0200, Stefan Kost wrote:
>> Jeffrey Barish wrote:
>> > Does anyone know what happens with playbin2 when the length of the file
>> > increases after initiating play?  Does playbin2 read the duration of
>> > the file either when it updates the uri property or when it goes into
>> > play mode?
>> >   
>> playbin2 itself does not care about the length. The length can also
>> change in the case of vbr when betetr stimates are available.
>> 
>> Stefan
>
> You can listen for GST_MESSAGE_DURATION messages on the bus to get
> notified of duration changes.
> 
> My 2 cents :)
> Philippe

The GST_MESSAGE_DURATION message is interesting, although in my quick test I 
don't seem to be getting it.  In any case, I don't really need to know that 
the length changed, I just need for playbin2 to play the entire file.  Is 
that what is meant by "does not care about the length"?

Here's what I observe, by way of example: Suppose that I start playing when 
the sound file has a length of 1 sec.  A short time after starting play (and 
well before play reaches the end of the sound file), the length of the sound 
file grows to 10 seconds.  No matter.  Play stops at 1 second and there is 
an EOS message on the bus.

There is nothing in my code that reads the length of the file, so I think 
the problem has to be with GStreamer or with the way I am using it.
-- 
Jeffrey Barish