Kivy VideoPlayer无法运行：ffpyplayer被忽略问题排查求助

我正在用Kivy开发第一个应用，但VideoPlayer组件无法正常运行。出现错误提示：Provider: ffpyplayer(['video_ffmpeg'] ignored)，这似乎是问题根源。我已通过pip安装了ffpyplayer及Pillow。

运行以下代码：

import kivy
print(kivy.kivy_options['VIDEO'])

得到输出：('gstplayer', 'ffmpeg', 'ffpyplayer', 'null')

最小可复现示例代码 #

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.videoplayer import VideoPlayer


class VideoPlayerWindow(Widget):

    def __init__(self, **kwargs):
        super(VideoPlayerWindow, self).__init__(**kwargs)
        self.player = VideoPlayer(
            source=r"D:\kivy-thelab\resources\commercial_free\videos\pilates1.mp4",
            state='play',
        )

class MainApp(App):
    def build(self):
        return VideoPlayerWindow()

if __name__ == "__main__":
    MainApp().run()

完整调试输出 #

[INFO   ] [Logger      ] Record log in C:\Users\Home\.kivy\logs\kivy_23-05-08_10.txt
[INFO   ] [deps        ] Successfully imported "kivy_deps.angle" 0.3.3
[INFO   ] [deps        ] Successfully imported "kivy_deps.glew" 0.3.1
[INFO   ] [deps        ] Successfully imported "kivy_deps.sdl2" 0.4.5
[INFO   ] [Kivy        ] v2.1.0
[INFO   ] [Kivy        ] Installed at "C:\Users\Home\miniconda3\envs\kivy_env\lib\site-packages\kivy\__init__.py"
[INFO   ] [Python      ] v3.9.0 | packaged by conda-forge | (default, Nov 26 2020, 07:53:15) [MSC v.1916 64 bit (AMD64)]
[INFO   ] [Python      ] Interpreter at "C:\Users\Home\miniconda3\envs\kivy_env\python.exe"
[INFO   ] [Logger      ] Purge log fired. Processing...
[INFO   ] [Logger      ] Purge finished!
[INFO   ] [Factory     ] 189 symbols loaded
[INFO   ] [ImageLoaderFFPy] Using ffpyplayer 4.5.0
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_pil, img_ffpyplayer 
[INFO   ] [Text        ] Provider: sdl2
[INFO   ] [VideoFFPy   ] Using ffpyplayer 4.5.0
[INFO   ] [Video       ] Provider: ffpyplayer(['video_ffmpeg'] ignored)
[INFO   ] [Window      ] Provider: sdl2
[INFO   ] [GL          ] Using the "OpenGL" graphics system
[INFO   ] [GL          ] GLEW initialization succeeded
[INFO   ] [GL          ] Backend used <glew>
[INFO   ] [GL          ] OpenGL version <b'4.6.0 - Build 27.20.100.8682'>
[INFO   ] [GL          ] OpenGL vendor <b'Intel'>
[INFO   ] [GL          ] OpenGL renderer <b'Intel(R) HD Graphics 620'>
[INFO   ] [GL          ] OpenGL parsed version: 4, 6
[INFO   ] [GL          ] Shading version <b'4.60 - Build 27.20.100.8682'>
[INFO   ] [GL          ] Texture max size <16384>
[INFO   ] [GL          ] Texture max units <32>
[INFO   ] [Window      ] auto add sdl2 input provider
[INFO   ] [Window      ] virtual keyboard not allowed, single mode, not docked
[INFO   ] [Base        ] Start application main loop
[ERROR  ] [Image       ] Error loading <D:\kivy-thelab\resources\commercial_free\videos\pilates1.mp4>
[INFO   ] [GL          ] NPOT texture support is available

请问我哪里操作出错了？

• 核心问题：未将VideoPlayer添加到界面布局
  你在VideoPlayerWindow的__init__方法中实例化了self.player，但没有调用self.add_widget(self.player)将其添加到Widget的子控件列表中，导致播放器组件不会被渲染显示。

• 关于video_ffmpeg被忽略的提示
  这个提示只是说明ffmpeg视频提供者不可用，但日志显示Kivy已经成功加载了ffpyplayer作为视频提供者（[VideoFFPy ] Using ffpyplayer 4.5.0），因此该提示不是视频无法播放的直接原因。

• 修改后的可运行代码

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.videoplayer import VideoPlayer


class VideoPlayerWindow(Widget):

    def __init__(self, **kwargs):
        super(VideoPlayerWindow, self).__init__(**kwargs)
        self.player = VideoPlayer(
            source=r"D:\kivy-thelab\resources\commercial_free\videos\pilates1.mp4",
            state='play',
            size_hint=(1, 1)  # 设置尺寸适配，让播放器占满窗口
        )
        self.add_widget(self.player)  # 关键：将播放器添加到界面

class MainApp(App):
    def build(self):
        return VideoPlayerWindow()

if __name__ == "__main__":
    MainApp().run()

• 额外排查步骤
  1. 验证视频文件路径是否正确，可尝试将视频移到更简单的路径（如D:\test.mp4）测试。
  2. 确认视频格式为ffpyplayer支持的编码（推荐H.264编码的MP4文件），若不确定可转换格式后重试。
  3. 更新ffpyplayer到最新版本：pip install --upgrade ffpyplayer。
  4. 避免conda与pip混合安装依赖，可尝试在纯pip环境中测试，排除环境冲突问题。

内容的提问来源于stack exchange，提问作者jamesB