+int VideoInput_change_rate(lua_State* L)
+{
+ assert(lua_gettop(L) == 2);
+ FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
+ double new_rate = luaL_checknumber(L, 2);
+ (*video_input)->change_rate(new_rate);
+ return 0;
+}
+