在 PowerShell 中处理视频文件可能不是最常见的任务,但在某些场景下非常有用。本文将介绍一些实用的视频处理技巧。
首先,让我们看看基本的视频操作:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
| function Get-VideoInfo { param( [string]$VideoPath ) try { $ffmpeg = "C:\ffmpeg\bin\ffmpeg.exe" $info = & $ffmpeg -i $VideoPath 2>&1 $duration = [regex]::Match($info, "Duration: (\d{2}):(\d{2}):(\d{2})") $size = (Get-Item $VideoPath).Length return [PSCustomObject]@{ FileName = Split-Path $VideoPath -Leaf Duration = [TimeSpan]::new( [int]$duration.Groups[1].Value, [int]$duration.Groups[2].Value, [int]$duration.Groups[3].Value ) FileSize = $size Info = $info } } catch { Write-Host "获取视频信息失败:$_" } }
|
视频格式转换:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
| function Convert-VideoFormat { param( [string]$InputPath, [string]$OutputPath, [ValidateSet("mp4", "avi", "mkv", "mov")] [string]$TargetFormat ) try { $ffmpeg = "C:\ffmpeg\bin\ffmpeg.exe" switch ($TargetFormat) { "mp4" { & $ffmpeg -i $InputPath -c:v libx264 -c:a aac -preset medium $OutputPath } "avi" { & $ffmpeg -i $InputPath -c:v libxvid -c:a libmp3lame $OutputPath } "mkv" { & $ffmpeg -i $InputPath -c copy $OutputPath } "mov" { & $ffmpeg -i $InputPath -c:v libx264 -c:a aac -f mov $OutputPath } } Write-Host "视频转换完成:$OutputPath" } catch { Write-Host "转换失败:$_" } }
|
视频剪辑:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
| function Split-Video { param( [string]$InputPath, [string]$OutputPath, [TimeSpan]$StartTime, [TimeSpan]$Duration ) try { $ffmpeg = "C:\ffmpeg\bin\ffmpeg.exe" $start = $StartTime.ToString("hh\:mm\:ss") $duration = $Duration.ToString("hh\:mm\:ss") & $ffmpeg -i $InputPath -ss $start -t $duration -c copy $OutputPath Write-Host "视频剪辑完成:$OutputPath" } catch { Write-Host "剪辑失败:$_" } }
|
视频压缩:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
| function Compress-Video { param( [string]$InputPath, [string]$OutputPath, [ValidateSet("high", "medium", "low")] [string]$Quality = "medium" ) try { $ffmpeg = "C:\ffmpeg\bin\ffmpeg.exe" $crf = switch ($Quality) { "high" { "23" } "medium" { "28" } "low" { "33" } } & $ffmpeg -i $InputPath -c:v libx264 -crf $crf -preset medium -c:a aac -b:a 128k $OutputPath Write-Host "视频压缩完成:$OutputPath" } catch { Write-Host "压缩失败:$_" } }
|
这些技巧将帮助您更有效地处理视频文件。记住,在处理视频时,始终要注意文件大小和编码质量。同时,建议在处理大型视频文件时使用流式处理方式,以提高性能。