python在启动之间切换播放媒体

Question

我试图建立一个系统，在这里，我的启动屏幕视频循环，直到2个按钮中的一个被按下(GPIO按钮)。

然后，播放更改为有字幕的视频或无字幕的视频.一旦它完成了它的播放，它会返回到溅屏视频。

我在这里有更多的代码，只是为了计算分析的每天播放次数。我的测试设备也只有一个按钮连接，这就是为什么从未使用GPIO 18。实现将与GPIO 17相同，因此一旦其中一个开始工作，另一个就不难匹配了。

问题

当我启动脚本时，媒体播放的并不总是splash。脚本还在播放结束时关闭窗口，并打开一个新窗口来播放媒体。我相信这可能是因为没有建立xwindow (对于raspberry pi)。

有什么建议吗？

#Vars

GPIO.setmode(GPIO.BCM)

GPIO.setup(17,GPIO.IN)
GPIO.setup(18,GPIO.IN)


update = True #Update to false to exit

def Main():
    # Setup logs
    print(date.today())
    # Media Paths
    path = "/home/pi/Videos/"
    nosubs = path+"Content-NoSubs.mp4"
    subs = path+"Content-Subtitles.mp4"
    splash = path+"StartScreen.mp4"
    Instance = vlc.Instance("-f")
    playlist = set([splash,subs,nosubs])
    url = [str(splash),str(subs),str(nosubs)] #Yes, this looks pretty redundant. Hopefully it's not.



    #Setup the player
    player = Instance.media_list_player_new()
    Media = Instance.media_new(url[1])
    Media_list = Instance.media_list_new(playlist)
    Media.get_mrl()
    player.set_media_list(Media_list)

    playerState = {'State.NothingSpecial',
 'State.Opening',
 'State.Buffering',
 'State.Playing',
 'State.Paused',
 'State.Stopped',
 'State.Ended',
 'State.Error'}

    subsPlayed = 0
    nosubsPlayed = 0
    active = 0
    playingMedia = 0

    while update:
        input = GPIO.input(17)
        state = str(player.get_state())

        if(state == playerState[0]):
            player.play_item_at_index(0)
            player.set_playback_mode(2)
    
        if(state == playerState[7]):
            player.play_item_at_index(0)
            playingMedia = 0
        
        if input == 1 and playingMedia == 0:
            playingMedia = 1
            player.play_item_at_index(1)
            active +=1
            nosubsPlayed +=1
        
        print(playingMedia)

    with open(str(date.today()))+'.txt','w' as file:
        file.write("Active Views: " + active)
        file.write("SubsPlayed: " + subsPlayed)
        file.write("No Subs Played: " + nosubsPlayed)
    
Main()

Answer 1

所以我想出了解决办法，但不是问题的根源。

    # Make my media paths into vlc.Media Objects
    nosubs = vlc.Media(path+"Content-NoSubs.mp4")
    subs = vlc.Media(path+"Content-Subtitles.mp4")
    splash = vlc.Media(path+"SplashScreen.mp4")

    #Setup the player
    player = Instance.media_list_player_new()
    Media_list = Instance.media_list_new()
    Media_list.add_media(splash)
    Media_list.add_media(subs)
    Media_list.add_media(nosubs)
    player.set_media_list(Media_list)
    Media_list.lock()

按列表中的名称设置每个媒体有助于将play函数从play_item_at_index(int)切换到play_item(media)

但还是不知道为什么是随机的。我的猜测是，这改变了媒体在名单中的地位，根据播放。

我的下一步将是调整这一点，使其不再使用media_player，并将回放嵌入到tkinter窗口中。