diff --git a/scripts/dev-env.ps1 b/scripts/dev-env.ps1
index 39698ea..b81a539 100644
--- a/scripts/dev-env.ps1
+++ b/scripts/dev-env.ps1
@@ -15,7 +15,7 @@ $edgeDir = (Resolve-Path (Join-Path $controlDir "..\safesight-edge")).Path
 
 # ── paths ──────────────────────────────────────────────
 $mediamtx = "C:\Software\mediamtx\mediamtx.exe"
-$mediamtxConf = "C:\Software\mediamtx\mediamtx.yml"
+$mediamtxDir = "C:\Software\mediamtx"
 $ffmpeg   = "ffmpeg"
 $minio    = "C:\Users\Tellme\minio\minio.exe"
 $minioData = "C:\Users\Tellme\minio\myminio"
@@ -37,7 +37,7 @@ function Write-Banner {
 }
 
 function Start-Detached {
-    param([string]$Name, [string]$Exe, [string[]]$Args, [switch]$Visible)
+    param([string]$Name, [string]$Exe, [string[]]$Args, [switch]$Visible, [string]$WorkDir)
     $exePath = $Exe
     if (-not (Test-Path $Exe)) {
         $cmd = Get-Command $Exe -ErrorAction SilentlyContinue
@@ -49,11 +49,10 @@ function Start-Detached {
     }
     Write-Host "  [START] $Name ($exePath)" -ForegroundColor Green
     $style = if ($Visible) { "Normal" } else { "Minimized" }
-    if ($Args -and $Args.Count -gt 0) {
-        $proc = Start-Process -FilePath $exePath -ArgumentList $Args -WindowStyle $style -PassThru
-    } else {
-        $proc = Start-Process -FilePath $exePath -WindowStyle $style -PassThru
-    }
+    $procArgs = @{FilePath=$exePath; WindowStyle=$style; PassThru=$true}
+    if ($WorkDir) { $procArgs.WorkingDirectory = $WorkDir }
+    if ($Args -and $Args.Count -gt 0) { $procArgs.ArgumentList = $Args }
+    $proc = Start-Process @procArgs
     Start-Sleep -Milliseconds 500
     return $proc
 }
@@ -73,7 +72,7 @@ function Stop-ByName {
 function Invoke-Start {
     # 1. RTSP server
     Write-Banner "1/5 RTSP Server (mediamtx)"
-    Start-Detached "mediamtx" $mediamtx @($mediamtxConf)
+    Start-Detached "mediamtx" $mediamtx -WorkDir $mediamtxDir
     Write-Host "  [WAIT] 等待 RTSP 服务就绪..." -ForegroundColor DarkGray
     $ready = $false
     for ($i = 0; $i -lt 10; $i++) {