Batch script to update Plex Pre Rolls to include all videos in specified locations.

Update_Plex_PreRolls.bat

@Echo off
SetLocal EnableExtensions DisableDelayedExpansion
GoTo :BEGIN
=================================================================================================
Update_Plex_PreRolls.bat
    Description: This script will include all video files in specified directories and update the
    registry value for Plex.
    
    Run by scheduled task. This needs to be executed by the user Plex Media Server is installed
	for. Arguments should be path locations of directories that include your Pre Roll videos.
	Must have atleast one argument.
    
    You can import the "Update_Plex_PreRolls.xml" file to Task Scheduler and modify as necessary.
    At a minimum you need to modify the command location (full path and file name of this file),
    arguments (full paths of pre roll directories), and working directory (full path excluding
    file name of this file).
    
    Example for single location:
    Update_Plex_PreRolls.bat "C:\Plex Media\Pre Rolls"
    
    Example for multiple locations:
    Update_Plex_PreRolls.bat "C:\Plex Media\Pre Rolls 01" "E:\Plex Media\Pre Rolls 02"
    
    Known Issues:
    -Network paths have not been tested.
-------------------------------------------------------------------------------------------------
Arguments: 
x. PreRoll Directories

-------------------------------------------------------------------------------------------------
Modification History
 Date    By         Description
------ ---------- -------------------------------------------------------------------------------
082620 Archer     Initial Version
082720 Archer     Support for ! in filenames added
082720 Archer     Removed txt file extension
=================================================================================================
:BEGIN
:---------------------------------------------------------------------------
:variables
:---------------------------------------------------------------------------
set "reg_data="
set extensions=3g2:3gp:avi:flv:h264:m4v:mkv:mov:mp4:mpg:mpeg:rm:swf:vob:wmv

:---------------------------------------------------------------------------
:arg_loop
:---------------------------------------------------------------------------
FOR %%a IN (%*) do (
	set "my_dir=%%a"
	for %%x in (%extensions::= %) do (
        set "my_ext=%%x"
        call :add_files_to_list
    )
)

call :update_reg
goto eof

:---------------------------------------------------------------------------
:functions!!!
:---------------------------------------------------------------------------

:---------------------------------------------------------------------------
:add_files_to_list
:---------------------------------------------------------------------------
cd /d %my_dir%
for %%G in ("*.%my_ext%") do (Echo "%%~fG"^|%%~xG
    if not defined reg_data (Set "reg_data=%%~fG") else (
        for /F "Tokens=1*Delims==" %%H in ('set reg_data'
        ) do set "reg_data=%%I;%%~fG"))
goto end_function

:---------------------------------------------------------------------------
:update_reg
:---------------------------------------------------------------------------
SetLocal EnableDelayedExpansion
set reg_path=HKEY_CURRENT_USER\Software\Plex, Inc.\Plex Media Server
set reg_key=CinemaTrailersPrerollID
set reg_type=REG_SZ
REG ADD "!reg_path!" /v "!reg_key!" /t !reg_type! /d "!reg_data!" /f
EndLocal
goto end_function

:---------------------------------------------------------------------------
:eof
:---------------------------------------------------------------------------
endlocal
exit /b 0

:---------------------------------------------------------------------------
:end_function
:---------------------------------------------------------------------------

Update_Plex_PreRolls.xml

<?xml version="1.0" encoding="UTF-16"?>
<Task version="1.4" xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task">
  <RegistrationInfo>
    <Date>2020-08-26T17:51:00.8955428</Date>
    <Author>ReenigneArcher</Author>
    <URI>\ReenigneArcher\Update_Plex_PreRolls</URI>
  </RegistrationInfo>
  <Triggers>
    <CalendarTrigger>
      <Repetition>
        <Interval>PT1H</Interval>
        <Duration>P1D</Duration>
        <StopAtDurationEnd>true</StopAtDurationEnd>
      </Repetition>
      <StartBoundary>2020-08-26T00:00:00</StartBoundary>
      <ExecutionTimeLimit>PT30M</ExecutionTimeLimit>
      <Enabled>true</Enabled>
      <ScheduleByDay>
        <DaysInterval>1</DaysInterval>
      </ScheduleByDay>
    </CalendarTrigger>
  </Triggers>
  <Principals>
    <Principal id="Author">
      <UserId>S-1-5-21-416373151-1271962822-2142307910-93376</UserId>
      <LogonType>InteractiveToken</LogonType>
      <RunLevel>LeastPrivilege</RunLevel>
    </Principal>
  </Principals>
  <Settings>
    <MultipleInstancesPolicy>IgnoreNew</MultipleInstancesPolicy>
    <DisallowStartIfOnBatteries>false</DisallowStartIfOnBatteries>
    <StopIfGoingOnBatteries>true</StopIfGoingOnBatteries>
    <AllowHardTerminate>true</AllowHardTerminate>
    <StartWhenAvailable>true</StartWhenAvailable>
    <RunOnlyIfNetworkAvailable>false</RunOnlyIfNetworkAvailable>
    <IdleSettings>
      <StopOnIdleEnd>true</StopOnIdleEnd>
      <RestartOnIdle>false</RestartOnIdle>
    </IdleSettings>
    <AllowStartOnDemand>true</AllowStartOnDemand>
    <Enabled>true</Enabled>
    <Hidden>true</Hidden>
    <RunOnlyIfIdle>false</RunOnlyIfIdle>
    <DisallowStartOnRemoteAppSession>false</DisallowStartOnRemoteAppSession>
    <UseUnifiedSchedulingEngine>true</UseUnifiedSchedulingEngine>
    <WakeToRun>false</WakeToRun>
    <ExecutionTimeLimit>PT1H</ExecutionTimeLimit>
    <Priority>7</Priority>
    <RestartOnFailure>
      <Interval>PT1M</Interval>
      <Count>3</Count>
    </RestartOnFailure>
  </Settings>
  <Actions Context="Author">
    <Exec>
      <Command>E:\Scripts\Update_Plex_PreRolls.bat</Command>
      <Arguments>"E:\Pre Roll"</Arguments>
      <WorkingDirectory>E:\Scripts</WorkingDirectory>
    </Exec>
  </Actions>
</Task>