本项目的目标是创建一个视频文件管理器应用,它能够:
import wx import os import datetime import subprocess import sys import cv2 # Ensure OpenCV is installed import threading class FileListFrame(wx.Frame): def __init__(self): wx.Frame.__init__(self, None, title="视频文件列表", size=(null, 400)) self.panel = wx.Panel(self) self.current_path = "" self.file_list_ctrl = wx.ListCtrl(self.panel, style=wx.LC_REPORT | wx.LC_SINGLE_SEL) self.file_list_ctrl.InsertColumn(null, "文件名") self.file_list_ctrl.InsertColumn(null, "大小") self.file_list_ctrl.InsertColumn(null, "修改时间") self.file_list_ctrl.Bind(wx.EVT_LIST_ITEM_SELECTED, self.on_file_selected) self.file_list_ctrl.Bind(wx.EVT_LIST_ITEM_ACTIVATED, self.on_file_double_clicked) self.path_label = wx.StaticText(self.panel, label="路径:") self.path_textctrl = wx.TextCtrl(self.panel, style=wx.TE_READONLY) self.path_button = wx.Button(self.panel, label="选择路径") self.path_button.Bind(wx.EVT_BUTTON, self.on_select_path) self.interval_label = wx.StaticText(self.panel, label="截图间隔(秒):") self.interval_textctrl = wx.TextCtrl(self.panel, value="1") self.capture_button = wx.Button(self.panel, label="生成截图") self.capture_button.Bind(wx.EVT_BUTTON, self.on_capture) self.export_button = wx.Button(self.panel, label="导出为文本") self.export_button.Bind(wx.EVT_BUTTON, self.on_export) self.play_button = wx.Button(self.panel, label="播放") self.play_button.Bind(wx.EVT_BUTTON, self.on_play) sizer = wx.BoxSizer(wx.VERTICAL) sizer.Add(self.path_label, 0, wx.ALL, 5) sizer.Add(self.path_textctrl, 0, wx.EXPAND | wx.LEFT | wx.RIGHT, 5) sizer.Add(self.path_button, 0, wx.ALL, 5) sizer.Add(self.interval_label, 0, wx.ALL, 5) sizer.Add(self.interval_textctrl, 0, wx.EXPAND | wx.LEFT | wx.RIGHT, 5) sizer.Add(self.capture_button, 0, wx.ALL, 5) sizer.Add(self.file_list_ctrl, 1, wx.EXPAND | wx.ALL, 5) sizer.Add(self.export_button, 0, wx.ALL, 5) sizer.Add(self.play_button, 0, wx.ALL, 5) self.panel.SetSizer(sizer) def on_select_path(self, event): dlg = wx.DirDialog(self, "选择路径", style=wx.DD_DEFAULT_STYLE) if dlg.ShowModal() == wx.ID_OK: self.current_path = dlg.GetPath() self.path_textctrl.SetValue(self.current_path) self.update_file_list() dlg.Destroy() def update_file_list(self): self.file_list_ctrl.DeleteAllItems() if not self.current_path: return file_list = self.search_video_files(self.current_path) for filename, file_path, file_size, modified_time in file_list: modified_time_str = datetime.datetime.fromtimestamp(modified_time).strftime("%Y-%m-%d %H:%M:%S") index = self.file_list_ctrl.InsertItem(self.file_list_ctrl.GetItemCount(), filename) self.file_list_ctrl.SetItem(index, 1, str(file_size)) self.file_list_ctrl.SetItem(index, 2, modified_time_str) def search_video_files(self, directory): video_extensions = ['.mp4', '.avi', '.mkv', '.mov', '.wmv', '.flv', '.webm'] file_list = [] for root, dirs, files in os.walk(directory): for file in files: if os.path.splitext(file)[1].lower() in video_extensions: file_path = os.path.join(root, file) file_size = os.path.getsize(file_path) modified_time = os.path.getmtime(file_path) file_list.append((file, file_path, file_size, modified_time)) return file_list def on_file_selected(self, event): selected_item = event.GetItem() file_name = selected_item.GetText() file_path = os.path.join(self.current_path, file_name) video = cv2.VideoCapture(file_path) fps = video.get(cv2.CAP_PROP_FPS) frame_count = int(video.get(cv2.CAP_PROP_FRAME_COUNT)) duration = frame_count / fps video.release() duration_str = str(datetime.timedelta(seconds=int(duration))) wx.MessageBox( f"文件名: {file_name}\n时长: {duration_str}", "视频信息", wx.OK | wx.ICON_INFORMATION) def on_file_double_clicked(self, event): self.on_play(event) def on_play(self, event): selected_item = self.file_list_ctrl.GetFirstSelected() if selected_item != -1: file_name = self.file_list_ctrl.GetItemText(selected_item) file_path = os.path.join(self.current_path, file_name) if sys.platform.startswith('win'): subprocess.Popen(['start', '', file_path], shell=True) elif sys.platform.startswith('darwin'): subprocess.Popen(['open', file_path]) elif sys.platform.startswith('linux'): subprocess.Popen(['xdg-open', file_path]) else: wx.MessageBox("请先选择要播放的文件", "提示", wx.OK | wx.ICON_INFORMATION) def on_export(self, event): dlg = wx.FileDialog(self, "保存为文本文件", wildcard="Text files (*.txt)|*.txt", style=wx.FD_SAVE | wx.FD_OVERWRITE_PROMPT) if dlg.ShowModal() == wx.ID_OK: file_path = dlg.GetPath() with open(file_path, 'w') as file: for index in range(self.file_list_ctrl.GetItemCount()): file.write(self.file_list_ctrl.GetItemText(index) + '\n') def on_capture(self, event): selected_item = self.file_list_ctrl.GetFirstSelected() if selected_item != -1: file_name = self.file_list_ctrl.GetItemText(selected_item) file_path = os.path.join(self.current_path, file_name) try: interval = int(self.interval_textctrl.GetValue()) except ValueError: wx.MessageBox("请输入有效的时间间隔(秒)", "错误", wx.OK | wx.ICON_ERROR) return thread = threading.Thread(target=self.capture_screenshots, args=(file_path, interval)) thread.start() else: wx.MessageBox("请先选择要生成截图的文件", "提示", wx.OK | wx.ICON_INFORMATION) def capture_screenshots(self, file_path, interval): # 生成以视频名称命名的文件夹 output_dir = os.path.join(self.current_path, os.path.splitext(os.path.basename(file_path))[0]) if not os.path.exists(output_dir): os.makedirs(output_dir) # 构造 ffmpeg 命令 cmd = [ 'ffmpeg', '-i', file_path, # 输入视频文件 '-vf', f'fps=1/{interval}', # 每隔 {interval} 秒截取一帧 os.path.join(output_dir, 'screenshot_%03d.jpg') # 输出截图路径及文件名格式 ] # 执行命令 subprocess.run(cmd, check=True) # 截图完成后,自动打开文件夹 if sys.platform.startswith('win'): subprocess.Popen(['explorer', output_dir]) elif sys.platform.startswith('darwin'): subprocess.Popen(['open', output_dir]) elif sys.platform.startswith('linux'): subprocess.Popen(['xdg-open', output_dir]) # def capture_screenshots(self, file_path, interval): # video = cv2.VideoCapture(file_path) # fps = video.get(cv2.CAP_PROP_FPS) # frame_count = int(video.get(cv2.CAP_PROP_FRAME_COUNT)) # duration = frame_count / fps # output_dir = os.path.join(self.current_path, os.path.splitext(os.path.basename(file_path))[0]) # if not os.path.exists(output_dir): # os.makedirs(output_dir) # for sec in range(null, int(duration), interval): video.set(cv2.CAP_PROP_POS_MSEC, sec * 1000) success, image = video.read() if success: cv2.imwrite(os.path.join(output_dir, f"{sec}.png"), image) video.release() wx.CallAfter(wx.MessageBox, "截图已生成", "完成", wx.OK | wx.ICON_INFORMATION) # Automatically open the folder containing screenshots if sys.platform.startswith('win'): subprocess.Popen(['explorer', output_dir], shell=True) elif sys.platform.startswith('darwin'): subprocess.Popen(['open', output_dir]) elif sys.platform.startswith('linux'): subprocess.Popen(['xdg-open', output_dir]) if __name__ == "__main__": app = wx.App() frame = FileListFrame() frame.Show() app.MainLoop()
让我们一步一步实现这个项目。
首先,你需要确保系统中安装了以下工具:
pip install wxPython
首先,我们创建一个主窗口类 FileListFrame
,用于展示视频文件列表并处理用户交互。
import wx import os import datetime import subprocess import sys import threading class FileListFrame(wx.Frame): def __init__(self): wx.Frame.__init__(self, None, title="视频文件管理器", size=(null, 400)) self.panel = wx.Panel(self) self.current_path = "" # 创建文件列表控件 self.file_list_ctrl = wx.ListCtrl(self.panel, style=wx.LC_REPORT | wx.LC_SINGLE_SEL) self.file_list_ctrl.InsertColumn(null, "文件名") self.file_list_ctrl.InsertColumn(null, "时长") self.file_list_ctrl.InsertColumn(null, "大小") self.file_list_ctrl.InsertColumn(null, "修改时间") self.file_list_ctrl.Bind(wx.EVT_LIST_ITEM_SELECTED, self.on_file_selected) self.file_list_ctrl.Bind(wx.EVT_LIST_ITEM_ACTIVATED, self.on_play) # 创建路径选择控件 self.path_label = wx.StaticText(self.panel, label="路径:") self.path_textctrl = wx.TextCtrl(self.panel, style=wx.TE_READONLY) self.path_button = wx.Button(self.panel, label="选择路径") self.path_button.Bind(wx.EVT_BUTTON, self.on_select_path) # 创建导出和播放按钮 self.capture_button = wx.Button(self.panel, label="截图") self.capture_button.Bind(wx.EVT_BUTTON, self.on_capture) # 创建截图时间间隔输入框 self.interval_label = wx.StaticText(self.panel, label="截图时间间隔(秒):") self.interval_textctrl = wx.TextCtrl(self.panel) # 创建布局 sizer = wx.BoxSizer(wx.VERTICAL) sizer.Add(self.path_label, 0, wx.ALL, 5) sizer.Add(self.path_textctrl, 0, wx.EXPAND | wx.LEFT | wx.RIGHT, 5) sizer.Add(self.path_button, 0, wx.ALL, 5) sizer.Add(self.file_list_ctrl, 1, wx.EXPAND | wx.ALL, 5) sizer.Add(self.interval_label, 0, wx.ALL, 5) sizer.Add(self.interval_textctrl, 0, wx.EXPAND | wx.ALL, 5) sizer.Add(self.capture_button, 0, wx.ALL, 5) self.panel.SetSizer(sizer)
在 __init__
方法中,我们初始化了主窗口,并创建了一个 ListCtrl
控件用于显示视频文件列表。还添加了用于选择路径的按钮和输入截图时间间隔的文本框。
接下来,我们实现选择路径和列出视频文件的功能:
# 处理选择路径事件 def on_select_path(self, event): dlg = wx.DirDialog(self, "选择路径", style=wx.DD_DEFAULT_STYLE) if dlg.ShowModal() == wx.ID_OK: self.current_path = dlg.GetPath() self.path_textctrl.SetValue(self.current_path) self.update_file_list() dlg.Destroy() # 更新文件列表 def update_file_list(self): self.file_list_ctrl.DeleteAllItems() if not self.current_path: return file_list = self.search_video_files(self.current_path) for filename, file_path, file_size, modified_time in file_list: modified_time_str = datetime.datetime.fromtimestamp(modified_time).strftime("%Y-%m-%d %H:%M:%S") index = self.file_list_ctrl.InsertItem(self.file_list_ctrl.GetItemCount(), filename) self.file_list_ctrl.SetItem(index, 1, "待获取") self.file_list_ctrl.SetItem(index, 2, str(file_size)) self.file_list_ctrl.SetItem(index, 3, modified_time_str) # 搜索视频文件 def search_video_files(self, directory): video_extensions = ['.mp4', '.avi', '.mkv', '.mov', '.wmv', '.flv', '.webm'] file_list = [] for root, dirs, files in os.walk(directory): for file in files: if os.path.splitext(file)[1].lower() in video_extensions: file_path = os.path.join(root, file) file_size = os.path.getsize(file_path) modified_time = os.path.getmtime(file_path) file_list.append((file, file_path, file_size, modified_time)) return file_list
这里我们通过遍历用户选择的路径,查找所有视频文件,并将其添加到列表控件中。视频文件的时长将在用户点击时获取。
我们使用 ffmpeg
提供的功能来获取视频文件的时长。
# 处理文件选择事件 def on_file_selected(self, event): selected_item = event.GetItem() file_name = selected_item.GetText() file_path = os.path.join(self.current_path, file_name) duration = self.get_video_duration(file_path) self.file_list_ctrl.SetItem(selected_item.GetId(), 1, duration) # 获取视频时长 def get_video_duration(self, file_path): cmd = [ 'ffmpeg', '-i', file_path, '-hide_banner', '-loglevel', 'error', '-show_entries', 'format=duration', '-of', 'default=noprint_wrappers=1:nokey=1' ] result = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True) duration = float(result.stdout.strip()) return str(datetime.timedelta(seconds=int(duration)))
在用户选择视频文件时,on_file_selected
事件被触发,应用会调用 ffmpeg
命令获取视频时长并显示在列表中。
用户可以通过双击视频文件来播放视频。我们使用默认的媒体播放器来实现播放功能:
# 处理播放事件 def on_play(self, event): selected_item = self.file_list_ctrl.GetFirstSelected() if selected_item != -1: file_name = self.file_list_ctrl.GetItemText(selected_item) file_path = os.path.join(self.current_path, file_name) if sys.platform.startswith('win'): subprocess.Popen(['start', '', file_path], shell=True) elif sys.platform.startswith('darwin'): subprocess.Popen(['open', file_path]) elif sys.platform.startswith('linux'): subprocess.Popen(['xdg-open', file_path]) else: wx.MessageBox("请先选择要播放的文件", "提示", wx.OK | wx.ICON_INFORMATION)
通过调用系统命令,我们让视频文件可以使用系统默认的播放器进行播放。
用户可以设置时间间隔,并对视频进行截图。截图将保存到以视频文件名命名的文件夹中:
# 处理截图事件 def on_capture(self, event): selected_item = self.file_list_ctrl.GetFirstSelected() if selected_item != -1: file_name = self.file_list_ctrl.GetItemText(selected_item) file_path = os.path.join(self.current_path, file_name) interval = int(self.interval_textctrl.GetValue()) thread = threading.Thread(target=self.capture_screenshots, args=(file_path, interval)) thread.start() else: wx.MessageBox("请先选择要截图的视频文件", "提示", wx.OK | wx.ICON_INFORMATION) # 截取视频截图 def capture_screenshots(self, file_path, interval): # 生成以视频名称命名的文件夹 output_dir = os.path.join(self.current_path, os.path.splitext(os.path.basename(file_path))[0]) if not os.path.exists(output_dir): os.makedirs(output_dir) # 构造 ffmpeg 命令 cmd = [ 'ffmpeg', '-i', file_path, '-vf', f'fps=1/{interval}', os.path.join(output_dir, 'screenshot_%03d.jpg') ] # 执行命令 subprocess.run(cmd, check=True) # 截图完成后,自动打开文件夹 if sys.platform.startswith('win'): subprocess.Popen(['explorer', output_dir]) elif sys.platform.startswith('darwin'): subprocess.Popen(['open', output_dir]) elif sys.platform.startswith('linux'): subprocess.Popen(['xdg-open', output_dir])
最后,添加主函数以启动应用:
if __name__ == "__main__": app = wx.App(False) frame = FileListFrame() frame.Show() app.MainLoop()
在这篇博客中,我们使用 wxPython 和 ffmpeg 创建了一个视频文件管理器。它不仅能管理和播放视频,还能生成视频截图,并将截图存放到特定的文件夹中。你可以根据需要进一步扩展这个应用程序,例如增加视频剪辑、视频合并等功能。希望这篇博客能帮助你更好地理解 wxPython 和 ffmpeg 的使用方法,并激发你在项目中应用这些技术的兴趣。
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