alphablend

来自「外国人写的一个很好的嵌入式视频采集源程序。」· 代码 · 共 6 行

There is a code snippet inside contrib dir - working with gtk_cam, which tests a simple alphablend log inside the image.
VideoDog isn't interfacing with it yet, due to lack of time/resources from my part to complete it, but you can see the results from gtk_cam.
Remember, the entry point to implement such functions is always video.c:grab_loop();
The main issue is the need of an efficient config file management, to add such features.