[gst-devel] Proposition for a media test suite

Ronald S. Bultje rbultje at ronald.bitfreak.net
Mon Nov 14 08:14:59 CET 2005

On Mon, 2005-11-14 at 16:10 +0100, Edward Hervey wrote:
> On 11/14/05, Ronald S. Bultje <rbultje at ronald.bitfreak.net> wrote:
> > - it has never been clear to me how such things are to be handled in a
> > non-playback fashion. Is a seek event in GST_STATE_NULL allowed? I
> > assume that we want to be able to set a pipeline to PAUSED but not get
> > any frames until after we've done a seek (for editing purposes).
> > Problem: how do we handle decodebin-pipelines then (where pipeline setup
> > is equal to preroll because it's the same statechange)? Once we start
> > doing this kind of stuff in testsuites, we want such things to be
> > thought out first.
>   Seek in STATE_NULL : NO !
>   Seek in STATE_PAUSED : the pipeline will preroll, so a buffer will
> arrive in all sinks
>   Seek in STATE_READY : the seek event is taken into account for when
> switching to PAUSED
>   When going to PAUSED, decodebin prerolls (as every element), you
> dynamically add the elements and set them to PAUSED. Once all elements
> are in PAUSED, the pipeline will complete the next step
>   Apparently you haven't had a look at gstfile.py since it does
> EVERYTHING you have mentionned above...

Read the question again, you didn't answer the main part. How do I make
sure the first frame coming out of my pipeline is the one I want to seek
to when seeking in a decodebin-generated pipeline?


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