使用MoviePy的time_mirror反转视频报错求助（MacOS环境）

问题详情 #

在MacOS系统中，尝试通过MoviePy的vfx.time_mirror方法反转视频，代码如下：

from moviepy.editor import *
import moviepy.video.fx.all as vfx
# Load the video
video = VideoFileClip("/videos/uncut/videogames/other/001.mp4")

popreversed_video = video.fx(vfx.time_mirror)

# Save the reversed video
reversed_video.write_videofile("videos/cut/videogames/other/001_rev.mp4")

print("done")

执行后反复出现读取帧失败错误：

MoviePy error: failed to read the first frame of video file /videos/uncut/videogames/other/001.mp4. That might mean that the file is corrupted. That may also mean that you are using a deprecated version of FFMPEG. On Ubuntu/Debian for instance the version in the repos is deprecated. Please update to a recent version from the website.
  File "/Shorts Project/codefiles/video_play_and_rewinde_test_001.py", line 11, in <module>
    popreversed_video = video.fx(vfx.time_mirror)
OSError: MoviePy error: failed to read the first frame of video file /videos/uncut/videogames/other/001.mp4. That might mean that the file is corrupted. That may also mean that you are using a deprecated version of FFMPEG. On Ubuntu/Debian for instance the version in the repos is deprecated. Please update to a recent version from the website.

已执行过以下操作，但问题未解决：

• pip install moviepy
• pip uninstall moviepy
• pip install ffmpeg
• pip install ffmpeg-python
• brew install ffmpeg
• pip uninstall ffmpeg
• pip install --upgrade moviepy

所有工具均为最新版本。

解决步骤 #

1. 校验视频路径与权限

   • 代码中视频路径为绝对路径/videos/uncut/videogames/other/001.mp4，在终端执行ls /videos/uncut/videogames/other/001.mp4，确认文件存在且当前用户有读取权限。
   • 如果是相对路径，需去掉开头斜杠，改为videos/uncut/videogames/other/001.mp4，确保路径相对于脚本运行目录有效。

2. 验证视频文件完整性

   • 用QuickTime等播放器打开原视频，确认能正常播放。若文件损坏，重新获取或修复视频。
   • 在终端执行ffmpeg -i /videos/uncut/videogames/other/001.mp4，若FFmpeg能输出完整的视频参数，说明文件正常；若报错，需处理文件编码或损坏问题。

3. 指定MoviePy使用的FFmpeg二进制文件

   • MacOS通过brew安装的FFmpeg路径通常为/usr/local/bin/ffmpeg，先在终端执行which ffmpeg确认路径。
   • 在代码开头添加以下代码，强制MoviePy使用brew安装的FFmpeg：

     import os
     os.environ["FFMPEG_BINARY"] = "/usr/local/bin/ffmpeg"  # 替换为which ffmpeg的输出结果
     

   • 执行python -c "from moviepy.config import get_setting; print(get_setting('FFMPEG_BINARY'))"，确认输出为brew安装的FFmpeg路径。

4. 修正代码变量错误

   • 代码中定义了popreversed_video，但保存时调用的是reversed_video，会触发NameError，先修正变量名：

     reversed_video = video.fx(vfx.time_mirror)
     reversed_video.write_videofile("videos/cut/videogames/other/001_rev.mp4")
     

5. 尝试降级MoviePy版本

   • 最新版本可能存在兼容性问题，执行pip install moviepy==2.0.0安装指定版本后再测试代码。

内容的提问来源于stack exchange，提问作者stelidakis