PowerShell Scripts for Downloading Channel 9 Videos

Channel9Downloader.ps1

# --- settings ---
$feedUrl = $Args[0]

$url = New-Object System.Uri($feedUrl)
$overwrite = $false
$destinationDirectory = join-path "C:\Channel9\" $url.Segments[-2]
 
# Download filter options
# "_high_ch9\.mp4"               - High quality mp4
# "_low_ch9\.mp4"                - Low quality mp4
# "_2MB_ch9\.wmv"                - High quality wmv (default)
# "^((?>(?!_2MB).)*)_ch9\.wmv"   - Low quality wmv (excluding high quality wmv)
# "_ch9\.wma"                    - WMA (audio)
# "_ch9\.mp3"                    - MP3
$downloadFilter = "_2MB_ch9\.wmv"
 
# --- locals ---
$webClient = New-Object System.Net.WebClient
 
# --- functions ---
function DownloadEntries {
 param ([string]$feedUrl) 
 $feed = [xml]$webClient.DownloadString($feedUrl)
 $progress = 0
 $pagepercent = 0
 $entries = $feed.rss.channel.item.Length
 $invalidChars = [System.IO.Path]::GetInvalidFileNameChars()
 $feed.rss.channel.item | foreach {
    $url = New-Object System.Uri(($_.group.content | where {$_.url -match $downloadFilter}).url)
    $name = $_.title
    $extension = [System.IO.Path]::GetExtension($url.Segments[-1])
    $fileName = $name + $extension

    $invalidchars | foreach { $filename = $filename.Replace($_, ' ') }
    $saveFileName = join-path $destinationDirectory $fileName
    $tempFilename = $saveFilename + ".tmp"
    $filename
    if ((-not $overwrite) -and (Test-Path -path $saveFileName)) 
    {
        write-progress -activity "$fileName already downloaded" -status "$pagepercent% of current page complete" -percentcomplete $pagepercent
    }
    else 
    {
        write-progress -activity "Downloading $fileName" -status "$pagepercent% of current page complete" -percentcomplete $pagepercent
       $webClient.DownloadFile($url, $tempFilename)
       rename-item $tempFilename $saveFileName
    }
    $pagepercent = [Math]::floor((++$progress)/$entries*100)
  }
}  
 
# --- do the actual work ---
 
# if dest dir doesn't exist, create it
if (!(Test-Path -path $destinationDirectory)) { New-Item $destinationDirectory -type directory }
 
DownloadEntries $feedUrl

Channel9Downloader.ps1 Channel9FeedUrl

Make sure you changed the basepath of the $destingationDirectory to your needs