rtphdrext: Update write() API to return a signed value
This is the companion of gst-plugins-base!1258 (merged) and it should be merged with it.
There is also another commit to actually use the failure return value for twcc.
This is the companion of gst-plugins-base!1258 (merged) and it should be merged with it.
There is also another commit to actually use the failure return value for twcc.