I want to play 2 video files using a GStreamer pipeline on my screen. The first video is without an embedded alpha channel and I want the second video with an embedded alpha channel to be overlaid over the first one.
The alpha plugin seems to be for adding an alpha channel to a video stream initially lacking it, but it's not what I want. How do I compose videos with embedded alpha channels in gstreamer?
Here are 2 samples: betina.flv (A420 color format) and betina.mov (BGRA color format).
My task is not to create such files but to overlay them on top of plain non-alpha movies.
gstreamer
?.ogv
file there seems to have an alpha channel embedded so if it turns out to be true the part of my question about video samples is answered.