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Explain step vs seek to change playback speed change

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Olivier Crête 2016-10-25 16:20:37 -04:00
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14
sdk-basic-tutorial-playback-speed.md
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@ -34,11 +34,15 @@ In [](sdk-basic-tutorial-time-management.md) seek
events have already been shown, using a helper function to hide their
complexity. This tutorial explains a bit more how to use these events.
Step Events are a more convenient way of changing the playback rate, due
to the reduced number of parameters needed to create them; however,
their implementation in GStreamer still needs a bit more polishing
so Seek Events are used in this tutorial instead.
**FIXME: Is that even true ???**
Step Events are a more convenient way of changing the playback rate,
due to the reduced number of parameters needed to create them;
however, they have some downsides, so Seek Events are used in this
tutorial instead. Step events only affect the sink (at the end of the
pipeline), so they will only work if the rest of the pipeline can
support going at a different speed, Seek events go all the way through
the pipeline so every element can react to them. The upside of Step
events is that they are much faster to act. Step events are also
unable to change the playback direction.
To use these events, they are created and then passed onto the pipeline,
where they propagate upstream until they reach an element that can