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ls *.txt -recurse | get-filehash | group -property hash | where { $_.count -gt 1 } | % { $_.group | select -skip 1 } | del

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From:
Date: Wed, 12 Jun 2019 16:30:29 +0200
Subject: Testing
Message-Id: <E6LNNA8BR7U4.Y5T2RHW5THP41@localhost.localdomain>
To: Coductivity <stefan.seeland@gmail.com>
X-Unsent: 1
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8

Hello World!

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Param([String]$path)
[convert]::ToBase64String((get-content $path -encoding byte))

#Onelineversion:
#[convert]::ToBase64String((get-content C:\Windows\Temp\aria-debug-708.log -encoding byte))

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.\ffmpeg.exe -i <source> -c:v libx265 -crf 28 -an <destination>

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$Lookup = @{
    378389 = [version]'4.5'
    378675 = [version]'4.5.1'
    378758 = [version]'4.5.1'
    379893 = [version]'4.5.2'
    393295 = [version]'4.6'
    393297 = [version]'4.6'
    394254 = [version]'4.6.1'
    394271 = [version]'4.6.1'
    394802 = [version]'4.6.2'

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#http://askubuntu.com/questions/221026/how-can-i-batch-extract-audio-from-mp4-files-with-ffmpeg-without-decompression#221069
mkdir -p output
# current directory has to contain at least one .mp4 file 
for vid in *.mp4; do
   codec="$(ffprobe -v error -select_streams a:0 -show_entries stream=codec_name -print_format csv=p=0 "$vid")"
   case "$codec" in
    mp3    ) filetype=mp3 ;;
    vorbis ) filetype=ogg ;;
    aac    ) filetype=m4a ;;
    *      ) filetype= ;;

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#http://askubuntu.com/questions/221026/how-can-i-batch-extract-audio-from-mp4-files-with-ffmpeg-without-decompression#221069
mkdir -p outputmp3
# current directory has to contain at least one .mp4 file 
for vid in *.mp4; do
   codec="$(ffprobe -v error -select_streams a:0 -show_entries stream=codec_name -print_format csv=p=0 "$vid")"
   case "$codec" in
    mp3    ) filetype=mp3 ;;
    *      ) filetype= ;;
   esac

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$packages = Get-Package -Provider Programs -IncludeWindowsInstaller
foreach (${package} in ${packages}) {  if ($package.Name -match "Microsoft .NET Core SDK") { Write-Output $package.Name  }}

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wget http://downloads.verapdf.org/rel/verapdf-installer.zip
unzip verapdf-installer.zip
cd verapdf-green*
./verapdf-install
echo run "java -jar ~/verapdf/bin/greenfield-apps-1.14.8.jar"

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ffmpeg -i source.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" destination.mp4