Python实现的视频播放器功能完整示例


Posted in Python onFebruary 01, 2018

本文实例讲述了Python实现的视频播放器功能。分享给大家供大家参考,具体如下:

# -*- coding:utf-8 -*-
#! python3
# ----------------------------------------------------------------------------
# pyglet
# Copyright (c) 2006-2008 Alex Holkner
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions 
# are met:
#
# * Redistributions of source code must retain the above copyright
#  notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright 
#  notice, this list of conditions and the following disclaimer in
#  the documentation and/or other materials provided with the
#  distribution.
# * Neither the name of pyglet nor the names of its
#  contributors may be used to endorse or promote products
#  derived from this software without specific prior written
#  permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# ----------------------------------------------------------------------------
'''Audio and video player with simple GUI controls.
'''
__docformat__ = 'restructuredtext'
__version__ = '$Id: $'
import sys
from pyglet.gl import *
import pyglet
from pyglet.window import key
def draw_rect(x, y, width, height):
  glBegin(GL_LINE_LOOP)
  glVertex2f(x, y)
  glVertex2f(x + width, y)
  glVertex2f(x + width, y + height)
  glVertex2f(x, y + height)
  glEnd()
class Control(pyglet.event.EventDispatcher):
  x = y = 0
  width = height = 10
  def __init__(self, parent):
    super(Control, self).__init__()
    self.parent = parent
  def hit_test(self, x, y):#点中控件
    return (self.x < x < self.x + self.width and 
        self.y < y < self.y + self.height)
  def capture_events(self):
    self.parent.push_handlers(self)
  def release_events(self):
    self.parent.remove_handlers(self)
class Button(Control):
  charged = False
  def draw(self):
    if self.charged:
      glColor3f(0, 1, 0)
    draw_rect(self.x, self.y, self.width, self.height)
    glColor3f(1, 1, 1)
    self.draw_label()
  def on_mouse_press(self, x, y, button, modifiers):
    self.capture_events()
    self.charged = True
  def on_mouse_drag(self, x, y, dx, dy, buttons, modifiers):
    self.charged = self.hit_test(x, y)
  def on_mouse_release(self, x, y, button, modifiers):
    self.release_events()
    if self.hit_test(x, y):
      self.dispatch_event('on_press')
    self.charged = False
Button.register_event_type('on_press')#注册事件
class TextButton(Button):
  def __init__(self, *args, **kwargs):
    super(TextButton, self).__init__(*args, **kwargs)
    self._text = pyglet.text.Label('', anchor_x='center', anchor_y='center')
  def draw_label(self):
    self._text.x = self.x + self.width / 2
    self._text.y = self.y + self.height / 2
    self._text.draw()
  def set_text(self, text):
    self._text.text = text
  text = property(lambda self: self._text.text,
          set_text)
class Slider(Control):
  THUMB_WIDTH = 6
  THUMB_HEIGHT = 10
  GROOVE_HEIGHT = 2
  def draw(self):
    center_y = self.y + self.height / 2
    draw_rect(self.x, center_y - self.GROOVE_HEIGHT / 2, 
         self.width, self.GROOVE_HEIGHT)
    pos = self.x + self.value * self.width / (self.max - self.min)
    draw_rect(pos - self.THUMB_WIDTH / 2, center_y - self.THUMB_HEIGHT / 2, 
         self.THUMB_WIDTH, self.THUMB_HEIGHT)
  def coordinate_to_value(self, x):#改变进度
    return float(x - self.x) / self.width * (self.max - self.min) + self.min
  def on_mouse_press(self, x, y, button, modifiers):
    value = self.coordinate_to_value(x)
    self.capture_events()
    self.dispatch_event('on_begin_scroll')
    self.dispatch_event('on_change', value)
  def on_mouse_drag(self, x, y, dx, dy, buttons, modifiers):
    value = min(max(self.coordinate_to_value(x), self.min), self.max)
    self.dispatch_event('on_change', value)
  def on_mouse_release(self, x, y, button, modifiers):
    self.release_events()
    self.dispatch_event('on_end_scroll')
Slider.register_event_type('on_begin_scroll')
Slider.register_event_type('on_end_scroll')
Slider.register_event_type('on_change')
class PlayerWindow(pyglet.window.Window):
  GUI_WIDTH = 400
  GUI_HEIGHT = 40
  GUI_PADDING = 4#按钮间隔
  GUI_BUTTON_HEIGHT = 16
  def __init__(self, player):
    super(PlayerWindow, self).__init__(caption='Media Player',
                      visible=False, 
                      resizable=True)
    self.player = player
    self.player.push_handlers(self)
    self.player.eos_action = self.player.EOS_PAUSE
    self.slider = Slider(self)
    self.slider.x = self.GUI_PADDING#类变量
    self.slider.y = self.GUI_PADDING * 2 + self.GUI_BUTTON_HEIGHT
    self.slider.on_begin_scroll = lambda: player.pause()
    self.slider.on_end_scroll = lambda: player.play()
    self.slider.on_change = lambda value: player.seek(value)
    self.play_pause_button = TextButton(self)
    self.play_pause_button.x = self.GUI_PADDING
    self.play_pause_button.y = self.GUI_PADDING
    self.play_pause_button.height = self.GUI_BUTTON_HEIGHT
    self.play_pause_button.width = 45
    self.play_pause_button.on_press = self.on_play_pause
    win = self#自有妙用
    self.window_button = TextButton(self)
    self.window_button.x = self.play_pause_button.x + \
                self.play_pause_button.width + self.GUI_PADDING
    self.window_button.y = self.GUI_PADDING
    self.window_button.height = self.GUI_BUTTON_HEIGHT
    self.window_button.width = 90
    self.window_button.text = 'Windowed'
    self.window_button.on_press = lambda: win.set_fullscreen(False)#注意不能写self
    self.controls = [
      self.slider, 
      self.play_pause_button,
      self.window_button,
    ]
    x = self.window_button.x + self.window_button.width + self.GUI_PADDING
    i = 0
    for screen in self.display.get_screens():
      screen_button = TextButton(self)
      screen_button.x = x
      screen_button.y = self.GUI_PADDING
      screen_button.height = self.GUI_BUTTON_HEIGHT
      screen_button.width = 80
      screen_button.text = 'Screen %d' % (i + 1)
      screen_button.on_press = \
        (lambda s: lambda: win.set_fullscreen(True, screen=s))(screen)
      self.controls.append(screen_button)
      i += 1
      x += screen_button.width + self.GUI_PADDING
  def on_eos(self):
    self.gui_update_state()
  def gui_update_source(self):
    if self.player.source:
      source = self.player.source
      self.slider.min = 0.
      self.slider.max = source.duration
    self.gui_update_state()
  def gui_update_state(self):
    if self.player.playing:
      self.play_pause_button.text = 'Pause'
    else:
      self.play_pause_button.text = 'Play'
  def get_video_size(self):
    if not self.player.source or not self.player.source.video_format:
      return 0, 0
    video_format = self.player.source.video_format
    width = video_format.width
    height = video_format.height
    if video_format.sample_aspect > 1:
      width *= video_format.sample_aspect
    elif video_format.sample_aspect < 1:
      height /= video_format.sample_aspect
    return width, height
  def set_default_video_size(self):
    '''Make the window size just big enough to show the current
    video and the GUI.'''
    width = self.GUI_WIDTH
    height = self.GUI_HEIGHT
    video_width, video_height = self.get_video_size()
    width = max(width, video_width)
    height += video_height
    self.set_size(int(width), int(height))
  def on_resize(self, width, height):
    '''Position and size video image.'''
    super(PlayerWindow, self).on_resize(width, height)
    self.slider.width = width - self.GUI_PADDING * 2
    height -= self.GUI_HEIGHT
    if height <= 0:
      return
    video_width, video_height = self.get_video_size()
    if video_width == 0 or video_height == 0:
      return
    display_aspect = width / float(height)
    video_aspect = video_width / float(video_height)
    if video_aspect > display_aspect:
      self.video_width = width
      self.video_height = width / video_aspect
    else:
      self.video_height = height
      self.video_width = height * video_aspect
    self.video_x = (width - self.video_width) / 2
    self.video_y = (height - self.video_height) / 2 + self.GUI_HEIGHT
  def on_mouse_press(self, x, y, button, modifiers):
    for control in self.controls:
      if control.hit_test(x, y):
        control.on_mouse_press(x, y, button, modifiers)
  def on_key_press(self, symbol, modifiers):
    if symbol == key.SPACE:
      self.on_play_pause()
    elif symbol == key.ESCAPE:
      self.dispatch_event('on_close')
  def on_close(self):
    self.player.pause()
    self.close()
  def on_play_pause(self):
    if self.player.playing:
      self.player.pause()
    else:
      if self.player.time >= self.player.source.duration:#如果放完了
        self.player.seek(0)
      self.player.play()
    self.gui_update_state()
  def on_draw(self):
    self.clear()
    # Video
    if self.player.source and self.player.source.video_format:
      self.player.get_texture().blit(self.video_x,
                      self.video_y,
                      width=self.video_width,
                      height=self.video_height)
    # GUI
    self.slider.value = self.player.time
    for control in self.controls:
      control.draw()
if __name__ == '__main__':
  if len(sys.argv) < 2:
    print('Usage: media_player.py <filename> [<filename> ...]')
    sys.exit(1)
  for filename in sys.argv[1:]:
    player = pyglet.media.Player()
    window = PlayerWindow(player)
    source = pyglet.media.load(filename)
    player.queue(source)
    window.gui_update_source()
    window.set_default_video_size()
    window.set_size(400,400)
    window.set_visible(True)
    window.gui_update_state()
    player.play()
  pyglet.app.run()

注:这里用到的pyglet库,可点击此处下载https://www.lfd.uci.edu/~gohlke/pythonlibs/#pyglet

希望本文所述对大家Python程序设计有所帮助。

Python 相关文章推荐
Python实现将一个大文件按段落分隔为多个小文件的简单操作方法
Apr 17 Python
浅谈Pandas:Series和DataFrame间的算术元素
Dec 22 Python
Django+Xadmin构建项目的方法步骤
Mar 06 Python
Python实现的删除重复文件或图片功能示例【去重】
Apr 23 Python
Django基础三之视图函数的使用方法
Jul 18 Python
Python+OpenCV 实现图片无损旋转90°且无黑边
Dec 12 Python
使用python实现多维数据降维操作
Feb 24 Python
Python yield生成器和return对比代码实例
Apr 20 Python
Python用来做Web开发的优势有哪些
Aug 05 Python
python 爬虫如何实现百度翻译
Nov 16 Python
Numpy ndarray 多维数组对象的使用
Feb 10 Python
pandas DataFrame.shift()函数的具体使用
May 24 Python
Python线性回归实战分析
Feb 01 #Python
Python使用matplotlib简单绘图示例
Feb 01 #Python
Python解决抛小球问题 求小球下落经历的距离之和示例
Feb 01 #Python
Python 判断 有向图 是否有环的实例讲解
Feb 01 #Python
python使用KNN算法手写体识别
Feb 01 #Python
python @property的用法及含义全面解析
Feb 01 #Python
详解Tensorflow数据读取有三种方式(next_batch)
Feb 01 #Python
You might like
php创建无限级树型菜单
2015/11/05 PHP
Zend Framework实现留言本分页功能(附demo源码下载)
2016/03/22 PHP
利用PHPExcel实现Excel文件的写入和读取
2017/04/26 PHP
用Javascript实现UTF8编码转换成gb2312编码
2006/12/22 Javascript
兼容IE与firefox火狐的回车事件(js与jquery)
2010/10/20 Javascript
使用Grunt.js管理你项目的应用说明
2013/04/24 Javascript
使用jQuery中的when实现多个AJAX请求对应单个回调的例子分享
2014/04/23 Javascript
JS中产生20位随机数以0-9为例也可以是a-z A-Z
2014/08/01 Javascript
仿JQuery输写高效JSLite代码的一些技巧
2015/01/13 Javascript
jQuery的事件委托实例分析
2015/07/15 Javascript
js图片卷帘门导航菜单特效代码分享
2015/09/10 Javascript
JavaScript操作XML/HTML比较常用的对象属性集锦
2015/10/30 Javascript
基于jquery实现日历签到功能
2020/09/11 Javascript
javascript 封装Date日期类实例详解
2017/05/28 Javascript
js jquery 获取某一元素到浏览器顶端的距离实现方法
2018/09/05 jQuery
vue  elementUI 表单嵌套验证的实例代码
2019/11/06 Javascript
Vue组件通信入门之Provide和Inject机制
2019/12/29 Javascript
JS 获取文件后缀,判断文件类型(比如是否为图片格式)
2020/05/09 Javascript
selenium在执行phantomjs的API并获取执行结果的方法
2018/12/17 Python
使用Python在Windows下获取USB PID&amp;VID的方法
2019/07/02 Python
如何解决django-celery启动后迅速关闭
2019/10/16 Python
Python大数据之网络爬虫的post请求、get请求区别实例分析
2019/11/16 Python
django框架单表操作之增删改实例分析
2019/12/16 Python
基于python监控程序是否关闭
2020/01/14 Python
基于python实现语音录入识别代码实例
2020/01/17 Python
Python控制台输出时刷新当前行内容而不是输出新行的实现
2020/02/21 Python
Python super()方法原理详解
2020/03/31 Python
Pycharm 设置默认解释器路径和编码格式的操作
2021/02/05 Python
CSS3的resize属性使用初探
2015/09/27 HTML / CSS
Html5自定义字体解决方法
2019/10/09 HTML / CSS
戴尔美国官网:Dell
2016/08/31 全球购物
计算机系毕业生推荐信
2013/11/06 职场文书
《观舞记》教学反思
2014/04/16 职场文书
保险内勤岗位职责
2015/04/13 职场文书
烈士陵园扫墓感想
2015/08/07 职场文书
2019年幼儿园管理条例范本!
2019/07/17 职场文书