剪切與另一個同名視頻相同長度的視頻

我錄制了一些相同長度為 40 秒的視頻。我有同名的舊視頻，但長度在 28-38 秒之間變化。我希望將新視頻剪輯成與舊視頻相同的長度。新舊同名。是否可以使用 ffmpeg 撰寫腳本？

獲取舊視頻的長度，然后將具有相同名稱的新視頻剪切為與舊視頻相同的長度。Windows powershell 或命令 bat 檔案。

只需要剪掉視頻的結尾

uj5u.com熱心網友回復：

如果您在 PATH 環境變數中ffprobe.exe有路徑 （如），則可以使用以下代碼：ffmpeg.exe
'C:\Program Files\ffmpeg\bin\'

# the folders where the old and the new videos can be found
$oldVideoPath = 'X:\path\to\OLD\videos'
$newVideoPath = 'X:\path\to\NEW\videos'

# get a list of the old video files; filenames only
$oldVidNames = (Get-ChildItem -Path $oldVideoPath -File).Name
# get the new video files and loop over them
(Get-ChildItem -Path $newVideoPath -File) | 
    Where-Object { $oldVidNames -contains $_.Name } | ForEach-Object {
        # construct the full path to the old video from which we take the duration
        $oldVideo = Join-Path -Path $oldVideoPath -ChildPath $_.Name
        # construct the full path to the trimmed output file (append '_trimmed')
        $trimmedVideo = Join-Path -Path $newVideoPath -ChildPath ('{0}_trimmed{1}' -f $_.BaseName, $_.Extension)

        # get the duration of the old video in format HH:mm:ss.ffffff
        $oldDuration = ffprobe -i "$oldVideo" -show_entries format=duration -v quiet -of csv="p=0" -sexagesimal
        Write-Host "Trimming '$($_.FullName)' to duration $oldDuration"

        # now trim the new video to the same length, overwriting the original by using switch '-y'
        ffmpeg -y -ss 00:00:00 -i "$($_.FullName)" -to $oldDuration -c:v copy -c:a copy "$trimmedVideo" -loglevel quiet
    }

如果您沒有該 PATH 環境變數，則需要使用包含 ffprobe 和 ffmpeg 的完整路徑和檔案名的變數，如下所示：

# the file paths to both ffprobe and ffmpeg if you do not have the path to the bin folder in your PATH environment variable
$ffprobe = 'C:\Program Files\ffmpeg\bin\ffprobe.exe'
$ffmpeg  = 'C:\Program Files\ffmpeg\bin\ffmpeg.exe'

# the folders where the old and the new videos can be found
$oldVideoPath = 'X:\path\to\OLD\videos'
$newVideoPath = 'X:\path\to\NEW\videos'

# get a list of the old video files; filenames only
$oldVidNames = (Get-ChildItem -Path $oldVideoPath -File).Name
# get the new video files and loop over them
(Get-ChildItem -Path $newVideoPath -File) | 
    Where-Object { $oldVidNames -contains $_.Name } | ForEach-Object {
        # construct the full path to the old video from which we take the duration
        $oldVideo = Join-Path -Path $oldVideoPath -ChildPath $_.Name
        # construct the full path to the trimmed output file (append '_trimmed')
        $trimmedVideo = Join-Path -Path $newVideoPath -ChildPath ('{0}_trimmed{1}' -f $_.BaseName, $_.Extension)

        # get the duration of the old video in format HH:mm:ss.ffffff
        $oldDuration = & $ffprobe -i "$oldVideo" -show_entries format=duration -v quiet -of csv="p=0" -sexagesimal
        Write-Host "Trimming '$($_.FullName)' to duration $oldDuration"

        # now trim the new video to the same length, overwriting the original by using switch '-y'
        & $ffmpeg -y -ss 00:00:00 -i "$($_.FullName)" -to $oldDuration -c:v copy -c:a copy "$trimmedVideo" -loglevel quiet
    }

ffmpeg 開關：

-y               overwrite output file if exists
-i               specifies the input file
-ss              the startposition in the input file (here `00:00:00` to start from the very beginning)
-to              specifies duration from start to end (this value is taken from the old file with the same name)
-c:v copy        trim video via stream copy (fast)
-c:a copy        trim audio via stream copy (fast)
-loglevel quiet  do not send output via error stream to console

ffprobe 開關：

-i                              specifies the input file
-show_entries format=duration   set list of entries to show, in this case we only want duration
-v quiet                        do not send output via error stream to console
-of csv="p=0"                   set output printing format to csv; do not print section name
-sexagesimal                    Use sexagesimal format HH:MM:SS.MICROSECONDS for time values.

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