GES smart video mixer framepositioner meta missing
When running ges-launch with gl elements in the smart mixer, the meta was not arriving to the mixer because of two reasons:
- glcolorconvert was not copying the framepositioner meta from the original buffer. It was copying no meta, actually.
- ges-smart-video-mixer was not checking the proper pad for that meta.
Edited by Xabier Rodríguez Calvar