| #!/usr/bin/python |
| import gobject; gobject.threads_init() |
| import pygst; pygst.require("0.10") |
| import gst |
| |
| p = gst.parse_launch (""" |
| v4l2src ! |
| videoconvert ! queue ! video/x-raw,width=320,height=240,framerate=30/1 ! burn qos=true name=vf ! videoconvert ! timeoverlay ! xvimagesink |
| """) |
| |
| m = p.get_by_name ("vf") |
| m.set_property ("adjustment", 128) |
| |
| control = gst.Controller(m, "adjustment") |
| control.set_interpolation_mode("adjustment", gst.INTERPOLATE_LINEAR) |
| control.set("adjustment", 0 * gst.SECOND, 128) |
| control.set("adjustment", 5 * gst.SECOND, 256) |
| control.set("adjustment", 25 * gst.SECOND, 0) |
| |
| p.set_state (gst.STATE_PLAYING) |
| |
| gobject.MainLoop().run() |
