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And use it in the launch example to print more useful error information,
like which elements are missing.

And hide behind the "futures" feature.

Fixes https://github.com/sdroege/gstreamer-rs/issues/26

Add Element::get_metadata(), get_pad_template(), get_pad_template_list() and DeviceProvider::get_metadata()

As wrapper around the C class functions.

Fixes https://github.com/sdroege/gstreamer-rs/issues/28

They can be accessed via the Tag trait impls instead

It's also immutable here.

François Laignel authored Aug 15, 2017 and Sebastian Dröge committed Aug 15, 2017

Fixes https://github.com/sdroege/gstreamer-rs/pull/27

Fixes https://github.com/sdroege/gstreamer-rs/issues/23

So that it can actually be used in a useful way.

Philippe Normand authored Aug 13, 2017 and Sebastian Dröge committed Aug 13, 2017

Fixes https://github.com/sdroege/gstreamer-rs/pull/25

Philippe Normand authored Aug 08, 2017 and Sebastian Dröge committed Aug 11, 2017

It's not binding friendly.

All the tags are supposed to be used via gst::tags::Title, etc to
prevent conflicts.

... and get the audio track's tags whenever they change.