OpenVINO 无法通过在 Windows 7 OS 中使用 PowerShell 执行来安装 OpenCV

Question

我正在尝试用 Windows 7 台旧电脑安装 openvino_2021.4.689 版本。

我的项目需要使用OpenCV，所以我必须使用PowerShell在openvino_2021.4.689的opencv文件夹中执行ffmpeg-download.psl like this.

如果我在命令提示符下通过 pip install opencv-python 安装我自己的 OpenCV 而不是通过 OpenVINO 的 ffmpeg-download.psl 文件安装，我的项目 cv2 库将无法成功运行。

具体来说，我的YOLOv4框架没有任何错误信息就无法显示，我使用cv2绘制图像的方法无法工作。

但是如果我用鼠标右键单击 ffmpeg-download.psl 并由 PowerShell 执行 select，我将收到一条错误消息，如image。（与系统管理员一起执行。）

FATAL: Unable to write with elevated privileges: bin\opencv_videoio_ffmpeg45364.dll

此外，这一步在我的Windows10或Windows11OS中总是很顺利，它只发生在Windows7过时的PC上。

下面是ffmpeg-download.psl.

中的内容

$url = "https://raw.githubusercontent.com/opencv/opencv_3rdparty/213fcd5d4897319a83207406036c4a5957fba010/ffmpeg/opencv_videoio_ffmpeg_64.dll"
$expected_md5 = "ac99f9767a83103c31709628af685924"
$output = "$PSScriptRoot\bin\opencv_videoio_ffmpeg453_64.dll"

Write-Output ("=" * 120)
try {
    Get-content -Path "$PSScriptRoot\etc/licenses\ffmpeg-readme.txt" -ErrorAction 'Stop'
} catch {
    Write-Output "Refer to OpenCV FFmpeg wrapper readme notes about library usage / licensing details."
}
Write-Output ("=" * 120)
Write-Output ""

if(![System.IO.File]::Exists($output)) {
    try {
        [io.file]::OpenWrite($output).close()
    } catch {
        Write-Warning "Unable to write: $output"
        if (!([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) {
            Write-Warning "Launching with 'Administrator' elevated privileges..."
            Pause
            Start-Process powershell.exe "-NoProfile -ExecutionPolicy Bypass -File `"$PSCommandPath`"" -Verb RunAs
            exit
        } else {
            Write-Output "FATAL: Unable to write with elevated privileges: $output"
            Pause
            exit 1
        }
    }

    try {
        Write-Output ("Downloading: " + $output)
        Import-Module BitsTransfer
        $start_time = Get-Date
        Start-BitsTransfer -Source $url -Destination $output -ErrorAction 'Stop'
        Write-Output "Downloaded in $((Get-Date).Subtract($start_time).Seconds) seconds"
    } catch {
        $_ # Dump error
        try {
            Write-Output ("Downloading (second attempt): " + $output)
            $start_time = Get-Date
            Invoke-WebRequest -Uri $url -OutFile $output
            Write-Output "Downloaded in $((Get-Date).Subtract($start_time).Seconds) seconds"
        } catch {
            Write-Output ("Can't download file: " + $output)
            Write-Output ("URL: " + $url)
            Write-Output "You need to download this file manually. Stop"
            Pause
            Exit
        }
    }
} else {
    Write-Output ("File exists: " + $output)
    Write-Output ("Downloading is skipped. Remove this file and re-run this script to force downloading.")
}

if(![System.IO.File]::Exists($output)) {
    Write-Output ("Destination file not found: " + $output)
    Write-Output "Stop"
    Pause
    Exit
}

try {
    $hash = Get-FileHash $output -Algorithm MD5 -ErrorAction 'Stop'

    if($hash.Hash -eq $expected_md5) {
        Write-Output "MD5 check passed"
    } else {
        Write-Output ("MD5     : " + $hash.Hash.toLower())
        Write-Output ("Expected: " + $expected_md5)
        Write-Output "MD5 hash mismatch"
    }
} catch {
    $_ # Dump error
    Write-Output "Can't check MD5 hash (requires PowerShell 4+)"
}
Pause
Write-Output "Exit"

Answer 1

英特尔® Distribution of OpenVINO™ Toolkit 为 Windows 验证和支持的操作系统是 Windows 10，64 位。使用旧 Windows 版本可能会导致意外问题。

如果仅查看您当前遇到的错误，可能是由于 Windows PowerShell 兼容版本。正如 ffmpeg-download.psl 中提到的那样，它需要 PowerShell 4+。 Windows 7 使用默认版本安装，Windows PowerShell 2.0.

OpenVINO 无法通过在 Windows 7 OS 中使用 PowerShell 执行来安装 OpenCV

OpenVINO cannot install OpenCV by executing with PowerShell in Windows 7 OS

python

powershell

opencv

ffmpeg

openvino