Add facetime example

Author: kkroening

examples/facetime.py

@@ -0,0 +1,8 @@
+import ffmpeg
+
+(
+    ffmpeg
+    .input('FaceTime', format='avfoundation', pix_fmt='uyvy422', framerate=30)
+    .output('out.mp4', pix_fmt='yuv420p', vframes=100)
+    .run()
+)