Question

我正在使用tk库来开发GUI。按下按钮后，执行以下功能

def playvid(self,x):
    if x == 1:
        cmd = 'gst-launch-1.0 videotestsrc ! autovideosink'
    elif x == 2:
        cmd = 'gst-launch -e videomixer name=mix ! ffmpegcolorspace ! autovideosink videotestsrc pattern=1 ! video/x-raw-yuv, framerate=5/1, width=320, height=180 ! videobox border-alpha=0 top=0 left=0 ! mix. videotestsrc pattern=15 ! video/x-raw-yuv, framerate=5/1, width=320, height=180 ! videobox border-alpha=0 top=0 left=-320 ! mix.'
    else:
        cmd = ''
    self.a = 0
    self.proc1 = subprocess.Popen(cmd,stdout=subprocess.PIPE,shell=True)
    print self.proc1.pid
    self.cmd = "kill -9 " + str(self.proc1.pid + 2)
    with Input(keynames='curses') as input_generator:
        for e in input_generator:
            if e == 's':
                os.system(self.cmd)
                return

这会将控制转移到子进程，并且只有在子进程被终止后才会执行GUI上的任何按钮单击。即使在创建子进程后，如何继续使用GUI？

子进程在使用子进程时进行控制

0 个答案: