Python VLC播放器.next()控件

Question

我正在编写一个自动存储塔程序，它可以根据组合键(A1、B2、C3等(播放媒体；media_player.next((&"；命令

假设你排了3首歌的队。如果你击中"；y"；key，正如我所期望的那样跳过了这首歌。我的问题是，一旦进入第三首歌，如果你点击"；y"；再次，它将循环回到第一首歌。我不想那样。我想要"；y"；在媒体列表中带你前进的键。。。如果这是媒体列表中的最后一首歌，请不要转到下一首歌。我怎么知道这是媒体列表中的最后一首歌，或者你如何阻止VLC回到开头？

#!/usr/bin/env python3
#
import os, sys, csv, vlc, time, serial
from pynput.keyboard import Key, Listener
#
# Set Defaults
#
DefaultUSBPath="/media/pi"
#
# Declare variables
#
USBDrive = None
Action = None
Playlist = []
SelectionCount = []
Sel_char = None
#
# Find the USB Drive
#
USBDrive =  os.path.join(DefaultUSBPath, "USB30FD")
#
# Adding to playlist - Returns directory contents and adds to playlist
#
def addplaylist(track):
list = None
if os.path.isdir(os.path.join(USBDrive, track)):
files = [f for f in os.listdir(os.path.join(USBDrive, track)) if os.path.isfile(os.path.join(USBDrive, track, f))]
for f in files:
if list is None:
list = os.path.join(USBDrive, track, f)
else:
list = list + ";" + os.path.join(USBDrive, track, f)
else:
print ("Error(3) - Selection is invalid")
if list is None:
print ("Error(4) - Selection has no media")
return list
#
# MediaPlayer function
#
def vlc_WhatsPlaying():
pass
def vlc_SongStarted(event):
print("Started")
song = media_player.get_media_player().get_media().get_mrl() # return path of current playing media
print(song)
splittrack = song.split("/")
track = splittrack[-2]
print(track)
return

def vlc_SongFinished(event):
print("Finished")
song = media_player.get_media_player().get_media().get_mrl() # return path of current playing media
print(song)
splittrack = song.split("/")
track = splittrack[-2]
#media_list.remove_index(0)
#media_player.play_item_at_index(1)
return
#
# Define keyboard actions
#
def on_press(key):
global Action, player
try:
Sel_char = int(key.char)
except:
try:
Sel_char = str(key.char)
Sel_char = Sel_char.upper()
except:
Sel_char = None
if Sel_char == "Z":
return False
elif Sel_char == "Y":
print("Skip")
media_player.next()
elif type(Sel_char) == str:
Action = Sel_char
elif type(Sel_char) == int:
Plist = None
Action = Action + str(Sel_char)
print("Action: " + Action)
Plist = addplaylist(Action)
if Plist is not None:
if ";" in Plist:
print(Plist)
Plist = Plist.split(";")
for p in Plist:
media_list.add_media(p)
else:
media_list.add_media(Plist)
# find section in array and increase the count by one
if not media_player.is_playing():
media_player.play()
else:
print ("Error(4) - Selection has no media")
else:
pass
#
# Setting Up Media Player
#
# creating Instance class object
player = vlc.Instance('--no-xlib --quiet ') # no-xlib for linux and quiet don't complain
media_player = vlc.MediaListPlayer()  # creating a media player object
media_list = player.media_list_new()  # creating a new media list
media_player.set_media_list(media_list)  # setting media list to the media player
new = player.media_player_new()  # new media player instance
media_player.set_media_player(new)  # setting media player to it
media_events = new.event_manager()  # setting event handler
# setting up events
media_events.event_attach(vlc.EventType.MediaPlayerMediaChanged, vlc_SongStarted)
media_events.event_attach(vlc.EventType.MediaPlayerEndReached, vlc_SongFinished)
# Read keyboard input
#
print("Ready...")
with Listener(on_press=on_press) as listener:
listener.join()
#
# Program is shutting down
#
print ("")
print ("Have a nice day!")
print ("")
sys.exit()

Answer 1

正如我的评论中所提到的，MediaListEndReached似乎对我没有任何作用，因此，按照list是解决问题的最简单方法的想法运行，如果next或previous命令试图超出列表末尾，下面的代码将测试正在播放的项目的list位置并退出
您只需跟踪索引变量就可以获得相同的结果
您可能需要调整mrl的拆分，以匹配列表中的条目。

import vlc
import time
## pinched from vlc for keyboard input
import termios
import tty
import sys
mymedia = ["vp.mp3","vp1.mp3","happy.mp3"]
def getch():  # getchar(), getc(stdin)  #PYCHOK flake
fd = sys.stdin.fileno()
old = termios.tcgetattr(fd)
try:
tty.setraw(fd)
ch = sys.stdin.read(1)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old)
return ch
## end pinched code
def jukebox():
player.play_item_at_index(0)    
m = player.get_media_player()
print("Playing - ",m.get_media().get_mrl()) 
while True:
k = getch()
if k == "n": #Next
media = m.get_media()
if media.get_mrl().rsplit("/",1)[1] == mymedia[-1]: #Next requested but already at the end
break 
player.next()
if k == "p": #Previous
media = m.get_media()
if media.get_mrl().rsplit("/",1)[1] == mymedia[0]: #Previous requested but already at the beginning
break 
player.previous()
if k == " ": #Pause
player.pause()
if k == "q": #Quit
player.stop()
return True
time.sleep(0.1)
state = player.get_state()
print(state,m.get_media().get_mrl()) 
print("End of list")
vlc_instance = vlc.Instance('--no-xlib --quiet ') # no-xlib for linux and quiet don't complain
player = vlc_instance.media_list_player_new()
Media = vlc_instance.media_list_new(mymedia)
player.set_media_list(Media)
print("Welcome to Jukebox")
print("Options - space = Play/Pause, n = Next, p = Previous, q = Quit")
print("Media",mymedia)
jukebox()