Identify a video within a stream

[Rossana Guerra]

Hello, I am new with GStreamer sorry if I couldn't find any tip according to
my answer or if it's obvious.
I have the following pipeline:


bin // GstBin
--------------------------------------------------------
alpha
        |------------videomixer---------ffmepgcolor
smpte
   |
-----------------------------------------------------------
   |
   gstController, asociated to the alpha property



Comp // GnlComposition
-------------------------------------------------------------------------------------------------------|

|
gnlsource
|
                --------- gnlOperation (contains the bin described
above)        |--------------queue ------------- sink
gnlsource
|

|
-------------------------------------------------------------------------------------------------------

The pipeline above solves the transition issue between 2 video streams. The
EOS signals the end of the whole stream, ie, video1 + video2 (asociated with
each gnlsource respectively)

I need to know the real duration of each video, mainly to control issues as
frame losts and the begining time of the next video. Which property or
technique solves this?.
The purposte is to control it to implement a playlist with this pipeline as
a base.

Thank you for any suggestion.

Rossana
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