Passing my own metadata

[Dimitrios Katsaros]

No, that is incorrect. The framework is build as such that you do not need
to reimplement existing components to handle the passing for metadata.

Instead, every metadata type defines its own transformation function that
allows you to manipulate metadata for any given case of transformation,
weather it is passthrough or a copy transform.

For an example of metadata handling you can check out:
http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/section-allocation-meta.html

I would also suggest seeing how other people have implemented metadata. A
good example, that is a bit more advanced, is the video metadata used by
all video components. You can find the source file in
gst-plugins-base/gst-libs/gst/video/gstvideometa.h/c

Dimitrios

On Thu, Jul 9, 2015 at 8:50 AM, Thornton, Keith <keith.thornton at zeiss.com>
wrote:

>  Hi,
>
> Have I understood correctly that if I wish to pass some metadata through
> my pipeline
>
> MyFirstFilter ! videocrop ! videoscale ! videorate ! MySecondFilter
>
> I would need to re-implement the plugins videocrop, videoscale and
> videorate and implement
>
> The copy_metadata, transform_metadata functions.
>
> Grüße
>
>
>
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