python脚本中的ffmpeg
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ffmpeg in python script
提问by jawwe
I would like to run the following command in a python script, I also want to make it loop over several videos in a folder. This is the command I want to run.
我想在 python 脚本中运行以下命令，我还想让它循环播放文件夹中的多个视频。这是我要运行的命令。
ffmpeg -i mymovie.avi -f image2 -vf fps=fps=1 output%d.png
ffmpeg -i mymovie.avi -f image2 -vf fps=fps=1 output%d.png
I want to fit it in something like this:
我想把它放在这样的地方：
import ffmpy
import os
path = './Videos/MyVideos/'
for filename in os.listdir(path):
name = filename.replace('.avi','')
os.mkdir(os.path.join(path,name))
*ffmpeg command here*
I found a wrapper for ffmpeg called ffmpy, could this be a solution?
我找到了一个名为 ffmpy 的 ffmpeg 包装器，这可能是一个解决方案吗？
回答by ocelot
From a brief look at FFMPY, you could do this using ffmpy.FFmpeg, as that allows any and all FFMPEG command line options, including -f.-- Click the link for documentation.
简单地看一下 FFMPY，您可以使用 ffmpy.FFmpeg 来完成此操作，因为它允许任何和所有 FFMPEG 命令行选项，包括 -f。-- 单击文档链接。
You could do the FFMPEG command with os.system. You'll need to import OS anyway to iterate through the files.
您可以使用os.system. 无论如何，您都需要导入操作系统以遍历文件。
You would need to iterate through all the files in a directory though. This would be the more challenging bit, it's quite easy with a for loop though.
不过，您需要遍历目录中的所有文件。这将是更具挑战性的一点，尽管使用 for 循环很容易。
for filename in os.listdir(path):
if (filename.endswith(".mp4")): #or .avi, .mpeg, whatever.
os.system("ffmpeg -i {0} -f image2 -vf fps=fps=1 output%d.png".format(filename))
else:
continue
The above code iterates through the directory at path, and uses command prompt to execute your given FFMPEG command, using the filename (if it's a video file) in place of mymovie.avi
上面的代码遍历目录 at path，并使用命令提示符执行给定的 FFMPEG 命令，使用文件名（如果是视频文件）代替mymovie.avi
回答by Tee Jung
Try pydemux in https://github.com/Tee0125/pydemux. Pydemux module can extract video frames as in Pillow Image format
在https://github.com/Tee0125/pydemux 中尝试 pydemux 。Pydemux 模块可以像 Pillow Image 格式一样提取视频帧
from PyDemux import Video
v = Video.open('video.mov')
i = 0
while True:
im = v.get_frame()
if im is None:
break
im.save('output%d.png'%i)
i = i + 1
