如何为ffmpeg创建Powershell脚本或Windows .bat文件 [英] How to create a powershell script / or windows .bat file for ffmpeg

问题描述

因此，我想创建一个Powershell或Batch文件(最适合该任务的文件)，我可以将其粘贴到文件夹中，并在执行后将开始使用FFmpeg编码所有视频

So, I want to create a Powershell or Batch file (whichever works best for the task), that I can paste in a folder and after executing it, will start to use FFmpeg to encode all videos

有效的部分(在.bat中):

The part that works (in .bat):

for %%a in ("*.mkv") do(
  ffmpeg -i "%%a" -c:v libx265 -c:a copy -x265-params crf=25 "%%a [encoded].mkv"
   pause)

这可行，但是在某些文件夹中，我已经有[已编码]文件.我想让脚本跳过这些文件.我在reddit中询问并收到以下脚本:

This works, but in some folders, I already have [encoded] files. I'd like for the script to skip these files. I asked in reddit and received the following script:

for %%a in ("*.mkv") do (
if not exist "%%a [encoded].mkv" ffmpeg -i "%%a" -c:v libx265 -c:a copy -x265-params crf=25 "%%a [encoded].mkv"
pause)

我尝试了该脚本，但是每个文件都进行了编码，即使其中包含[encoded]也是如此.在我指出这一点之后，他们告诉我，我可能应该切换到PowerShell，并提供指向StackOverflow问题的链接:

I tried the script, but every file got encoded, even if it had the [encoded] in it. After I pointed that out, they told me that I should probably switch to PowerShell and gave a link to a StackOverflow question:

您可能需要切换到PowerShell查找不包含所选字符串的文件然后在返回的内容中执行一次foreach，以对其执行ffmpeg命令.

You probably need to switch to PowerShell Find files which does not contains selected string Then do a foreach in what is returned to execute the ffmpeg command on it.

但是我不知道如何在PowerShell中编码(以前从未使用过).bat文件甚至可以工作?如果可以，我该怎么写?而且，如果PowerShell脚本是更好的选择，我该如何编写代码?

but I don't know how to code in PowerShell (never used it before) Would a .bat file even work? If yes, how could I write it? And if a PowerShell script would be the better option, how would I code it?

感谢您的帮助和解答.

推荐答案

在 PowerShell 中，您可以使用以下内容(可以将此代码按原样粘贴到PowerShell控制台窗口中):

In PowerShell, you can use the following (you can paste this code as-is into a PowerShell console window):

Get-ChildItem *.mkv | where BaseName -notlike '*`[encoded]' | foreach {
  ffmpeg -i $_ -c:v libx265 -c:a copy -x265-params crf=25 "$($_.BaseName) [encoded].mkv"
  pause
}

• Get-ChildItem * .mkv 使用 Get-ChildItem 以获得当前目录中所有扩展名为( .mkv )的文件的信息(您可以添加 -File 来明确排除目录，但是带有扩展名的目录名称是).

  • Get-ChildItem *.mkv uses the Get-ChildItem to get information about all files with extension (.mkv) in the current directory (you could add -File to explicitly rule out directories, but directory names with extensions are are).

    其中BaseName-类似于'*`[encoded]'使用通配符， -like / -notlike 运算符进行操作.

    where BaseName -notlike '*`[encoded]' uses the Where-Object cmdlet (whose built-in alias is where) to weed out files whose base name (the name without the filename extensions) already ends in [encoded]. Note the ` before the opening [ in order to use it verbatim, because [ has special meaning in PowerShell's wildcard expressions, which the -like / -notlike operator operates on.

    foreach {...} 使用 ForEach-Object cmdlet(其内置别名为 foreach )对每个调用 ffmpeg 感兴趣的文件:

    foreach { ... } uses the ForEach-Object cmdlet (whose built-in alias is foreach) to invoke ffmpeg for each file of interest:

    • 在脚本块( {...} )中， System.IO代表输入文件的.FileInfo 实例.

    • Inside the script block ({ ... }), the automatic $_ variable refers to the pipeline (|) input object at hand, which in this case is a System.IO.FileInfo instance representing an input file.

    "$($ _.BaseName)[encoded] .mkv" 使用可扩展字符串 (字符串插值)，可通过输入文件的基本名称( $ _.BaseName )导出输出文件名.

    "$($_.BaseName) [encoded].mkv" uses an expandable string (string interpolation) to derive the output file name via the input file's base name ($_.BaseName).

    这篇关于如何为ffmpeg创建Powershell脚本或Windows .bat文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！