Custom data handling

[Stirling Westrup]

Gstreamer provides a LOT of ways for elements to communicate. Which
way is best depends on the type and use of the information you want to
pass. Just off the top of my head your options include:

1) Properties.  One element can configure another directly.
2) Custom Sources and Sinks. As mentioned above, you can invent a new
data class and create sources/sinks for them.
3) Capabilities. You can also re-use an existing data class and just
add new capabilities to it.
4) Metadata. You can tack extra data onto flowing buffers to say
something about those buffers.
5) Tags. You can create tags to send down the stream to annotate facts
about the stream.
6) Signals. One element can raise signals that are caught by a
callback that takes appropriate actions.
7) Messages. Messages can be sent along the stream from one element to another.
8) Events. Events can also be sent along the stream from one element to another.
9) Queries. One element can ask the upstream or downstream elements
for information it needs.

There may be even more. In order to know which is better, we'd need to
know far more about your application and its data, and its handling
needs.


On Thu, Feb 14, 2013 at 12:47 PM, Baby Octopus
<jagadishkamathk at gmail.com> wrote:
> I want to send some custom information between two elements in my pipeline.
> The two elements may not be connected directly and there might be 3rd
> element in between. How can I pass information in such a case?
>
> ~BO
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--
Stirling Westrup
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