AviSynth Q&A

[Fjord]

Is there a filter/function/script in Avisynth that will take the average of an entire clip? That is, to create a single frame from a clip, where each pixel in the result frame is the average of all pixels in that position in the clip. The result could be a clip containing 1 frame (ie 32-bit float), or to write the result to a file, fx TIFF in 32-bit float format?

I am only aware of temporal filters that return the average of 3 to 7 frames at a time, for each frame in a clip (TemporalDegrain(), MedianBlurTemporal(), ex_median(), etc.).

The next question will be if this can be done with other statistics, for example maximum, minimum, median?

My objective for this is to create a single-frame mask for a clip that isolates specific areas according to the statistic - for example the areas of an image that are consistently dark for the whole scene. (assuming the clip contains a single scene)

[Reel.Deel]

Originally Posted by Fjord

Is there a filter/function/script in Avisynth that will take the average of an entire clip?

ClipBlend:

#Or to get a single frame average of all frames in a clip:
AviSource("blah.avi")
ClipBlend()
Trim(FrameCount-1,-1)

Float is not supported only 8-bit and 16-bit stacked.

[Fjord]

Thanks @Reel.Deel. Spot on!

Given that I have 10-bit source (YUV442P10), I assume I should use source.ConvertToStacked() as input to ClipBlend16(), to use all 10 bits in the process (assuming no overflow in the accumulator). Do I need to convert to YUV444P16 first?

I'll add my vote for HBD support for ClipBlend, and option for running maximum or minimum. Internal 64-bit float accumulator would also be nice.

[FranceBB]

Originally Posted by Fjord

Thanks @Reel.Deel. Spot on!

Given that I have 10-bit source (YUV442P10), I assume I should use source.ConvertToStacked() as input to ClipBlend16()

Almost, you need ConvertBits(16) first 'cause ConverttoStacked() only accepts 16bit planar as input as it will divide it in 8bit MSB and 8bit LSB.
Using the Reel.Deel example, in your case it would be like:

#Indexing the 10bit planar source
LWLibavVideoSource("whatever.mov")

#Going to 16bit planar
ConvertBits(16)

#Go to 16bit stacked (MSB and LSB)
ConverttoStacked()

#Work with 16bit stacked precision
ClipBlend16()

#Go back to 16bit planar
ConvertFromStacked()

#Final result with 16bit planar precision
Trim(FrameCount-1,-1)

Originally Posted by Fjord

I'll add my vote for HBD support for ClipBlend

Just in case, if/when they'll add 16bit planar support, make sure not to remove 16bit stacked support in the meantime as otherwise it won't be possible for legacy Avisynth versions like 2.6.1 to work in high bit depth and also filters that might depend on it.


Cheers,
Frank

[Fjord]

Thanks Frank! Got it.

[Reel.Deel]

Originally Posted by Fjord

I'll add my vote for HBD support for ClipBlend, and option for running maximum or minimum. Internal 64-bit float accumulator would also be nice.

Maybe StainlessS will see this. I've been on the his waiting list for almost 2 yearssS

If you need 32-bit you can do it with expr but you will have to modify the AvgAll_16 script.

[kedautinh12]

Waiting for Staindroid

[Dogway]

Originally Posted by Fjord

Is there a filter/function/script in Avisynth that will take the average of an entire clip?
...
The next question will be if this can be done with other statistics, for example maximum, minimum, median?

That's basically the purpose of SceneStats. Generally it's for scenes, but you can also run ClipStats to get global statistics (min, max, median, mean, etc). ClipStats usually hangs AVS+ though (AvsPmod maybe?).

[GAP]

Originally Posted by Emulgator

Modify the Universal Groucho setavs.cmd to

::Batch script for fast switching of Avisynth versions
::Initial idea and work by Groucho2004
::Modified by jones1913
::Modified and extended by Groucho2004
::Updated for AVSPLUS373 folders by Emulgator

@echo off
cls
setlocal

:Check administrative privileges
fsutil dirty query %systemdrive% > nul
if errorlevel 1 goto :noAdmin


::  ########################## Start Configuration #########################

::   The variable "AVS_SRC_DIR" must be set according to the location of
::   this batch file.

::   The simplest way to have this up and running is to copy the "AvisynthRepository"
::   directory to a location of your choice (avoid "Program Files" or "Program Files (x86)")
::   and create a shortcut to the "setavs.cmd" batch file in the root of "AvisynthRepository".

::   If you want to run the batch file from a different directory
::   (i.e. a directory to which the "PATH" environment variable points),
::   remove the "%~dp0" and use a fully qualified path to the source directory.
::   Example: "set AVS_SRC_DIR=E:\VideoTools\AvisynthRepository"
set AVS_SRC_DIR=%~dp0


::   Default plugin directories
::   If you leave them blank, the respective "plugin" directories within
::   the "AvisynthRepository" source directories will be used.
set PLUGDIR32=
set PLUGDIR64=


::   Additional plugin directories (works only with Avisynth+)
::   If you leave them blank, only the default plugin directories (see above)
::   will be used.
set PLUGDIR32PLUS=
set PLUGDIR64PLUS=


::  **IMPORTANT:
::  If you have customized any of the above directories and their names contain
::  special characters such as '&', '(' or ')', enclose the variable and path
::  in double quotes and use the escape character '^' before the special character(s).
::  
::  Example 1:
::  set "AVS_SRC_DIR=C:\Program Files ^(x86^)\Avisynth"
::  
::  Example 2:
::  set "PLUGDIR32=C:\Program Files ^(x86^)\Avisynth\Plugins ^& avsi"


::  ########################### End Configuration ##########################



if "%AVS_SRC_DIR%" == "" (
  echo.
  echo The source directory ^(AVS_SRC_DIR^) is not defined.
  echo Please read the instructions above.
  echo.
  goto :end
)

if /i %PROCESSOR_ARCHITECTURE%==x86 if not defined PROCESSOR_ARCHITEW6432 set winarch=x32

:: Remove trailing backslash if present
if "%AVS_SRC_DIR:~-1%"=="\" SET AVS_SRC_DIR=%AVS_SRC_DIR:~0,-1%

echo.
echo  Installed Avisynth version(s):
echo.
if defined winarch (
	"%AVS_SRC_DIR%\Tools\AVSVersion32.exe"
) else (
	"%AVS_SRC_DIR%\Tools\AVSVersion32.exe"
	echo.
	"%AVS_SRC_DIR%\Tools\AVSVersion64.exe"
)
echo.

echo.
echo  Select the Avisynth version you want to install/uninstall:
echo.
echo    1 = Avisynth      2.5.8
echo    2 = Avisynth      2.6.0
echo    3 = Avisynth      2.6.1 (Alpha)
echo    4 = Avisynth      2.6.0 (SEt's multi-threaded build)
echo.

echo    5 = Avisynth+     0.1.0 (x86, r2772)
echo    6 = Avisynth+     0.1.0 (x64, r2772)
echo    7 = Avisynth+ XP  3.7.0 (x86, r3382)
echo    8 = Avisynth+ XP  3.7.0 (x64, r3382)
echo    9 = Avisynth+     3.7.3 (x86, r3825)
echo   10 = Avisynth+     3.7.3 (x64, r3825)

echo.
echo   13 = Uninstall Avisynth x86
echo   14 = Uninstall Avisynth x64
echo.
echo   NOTE: 64 bit versions can be installed alongside 32 bit versions.
echo.
echo.
set no=
set /p no=  [1-12] (leave blank and [Enter] to exit): 
if [%no%]==[] goto :cancel


if %no%==1 set avs=AVS258
if %no%==2 set avs=AVS260
if %no%==3 set avs=AVS261_Alpha
if %no%==4 set avs=AVS260_MT

if %no%==5  (set avs=AVSPLUS010_x86) & set avspl=true
if %no%==6  (set avs=AVSPLUS010_x64) & set avspl=true
if %no%==7  (set avs=AVSPLUS370_x86_XP) & set avspl=true
if %no%==8  (set avs=AVSPLUS370_x64_XP) & set avspl=true
if %no%==9  (set avs=AVSPLUS373_x86) & set avspl=true
if %no%==10 (set avs=AVSPLUS373_x64) & set avspl=true


if %no%==13 (set avs=AVSx86) & goto :uninstall
if %no%==14 (set avs=AVSx64) & goto :uninstall
echo.
if [%avs%]==[] (echo Invalid input...
	goto :menu)

if %avs%==AVSPLUS010_x64 set x64=true
if %avs%==AVSPLUS370_x64 set x64=true
if %avs%==AVSPLUS370_x64_XP set x64=true
if %avs%==AVSPLUS373_x64 set x64=true

:install

:: Remove trailing backslash if present
if "%AVS_SRC_DIR:~-1%"=="\" SET AVS_SRC_DIR=%AVS_SRC_DIR:~0,-1%

if "%PLUGDIR32%" == "" (
  set REGPLUGDIR32=%AVS_SRC_DIR%\%avs%\plugins
) else (
  set REGPLUGDIR32=%PLUGDIR32%
)

if "%PLUGDIR64%" == "" (
  set REGPLUGDIR64=%AVS_SRC_DIR%\%avs%\plugins
) else (
  set REGPLUGDIR64=%PLUGDIR64%
)

if "%PLUGDIR32PLUS%" == "" (
  set REGPLUGDIR32PLUS=%AVS_SRC_DIR%\%avs%\plugins
) else (
  set REGPLUGDIR32PLUS=%PLUGDIR32PLUS%
)

if "%PLUGDIR64PLUS%" == "" (
  set REGPLUGDIR64PLUS=%AVS_SRC_DIR%\%avs%\plugins
) else (
  set REGPLUGDIR64PLUS=%PLUGDIR64PLUS%
)

:: Remove trailing backslash if present
if "%REGPLUGDIR32PLUS:~-1%"=="\" SET REGPLUGDIR32PLUS=%REGPLUGDIR32PLUS:~0,-1%
if "%REGPLUGDIR64PLUS:~-1%"=="\" SET REGPLUGDIR64PLUS=%REGPLUGDIR64PLUS:~0,-1%
if "%REGPLUGDIR32:~-1%"=="\" SET REGPLUGDIR32=%REGPLUGDIR32:~0,-1%
if "%REGPLUGDIR64:~-1%"=="\" SET REGPLUGDIR64=%REGPLUGDIR64:~0,-1%

echo Installing %avs%...
echo.
if defined winarch (
	echo setup for 32bit windows system...
	echo.

	if defined x64 ( echo Attempt to install x64 AVS on x32 Windows.
		goto :cancel )

	echo copying %avs% files to "%WINDIR%\System32"...
	copy /y "%AVS_SRC_DIR%\%avs%\avisynth.dll" "%WINDIR%\System32"
	copy /y "%AVS_SRC_DIR%\%avs%\devil.dll" "%WINDIR%\System32"
	if errorlevel 1 ( echo Failed to copy files to "%WINDIR%\System32"
		goto :error )
	echo.
	echo Writing "HKLM\SOFTWARE\Avisynth" /v "" /d "%AVS_SRC_DIR%\%avs%"
	reg add "HKLM\SOFTWARE\Avisynth" /v "" /d "%AVS_SRC_DIR%\%avs%" /f
	echo.

	echo Writing "HKLM\SOFTWARE\Avisynth" /v "PluginDir2_5" /d "%REGPLUGDIR32%"
	reg add "HKLM\SOFTWARE\Avisynth" /v "PluginDir2_5" /d "%REGPLUGDIR32%" /f
	if errorlevel 1 ( echo Error on importing registry keys!
		goto :error )

	if "%REGPLUGDIR32PLUS%" GTR "" (
		echo.
		echo Writing "HKLM\SOFTWARE\Avisynth" /v "PluginDir+" /d "%REGPLUGDIR32PLUS%"
		reg add "HKLM\SOFTWARE\Avisynth" /v "PluginDir+" /d "%REGPLUGDIR32PLUS%" /f
		if errorlevel 1 ( echo Error on importing registry keys!
			goto :error )
	)

	call :regWin
) else (
	echo setup for 64bit windows system...
	echo.
	if defined x64 (
		echo copying %avs% files to "%WINDIR%\System32"...
		copy /y "%AVS_SRC_DIR%\%avs%\avisynth.dll" "%WINDIR%\System32"
		copy /y "%AVS_SRC_DIR%\%avs%\devil.dll" "%WINDIR%\System32"
		if errorlevel 1 ( echo Failed to copy files to "%WINDIR%\System32"
			goto :error )
		echo.
		echo Writing "HKLM\SOFTWARE\Avisynth" /v "" /d "%AVS_SRC_DIR%\%avs%"
		reg add "HKLM\SOFTWARE\Avisynth" /v "" /d "%AVS_SRC_DIR%\%avs%" /f
		echo.

		echo Writing "HKLM\SOFTWARE\Avisynth" /v "PluginDir2_5" /d "%REGPLUGDIR64%"
		reg add "HKLM\SOFTWARE\Avisynth" /v "PluginDir2_5" /d "%REGPLUGDIR64%" /f
		if errorlevel 1 ( echo Error on importing registry keys!
			goto :error )

		if "%REGPLUGDIR64PLUS%" GTR "" (
			echo.
			echo Writing "HKLM\SOFTWARE\Avisynth" /v "PluginDir+" /d "%REGPLUGDIR64PLUS%"
			reg add "HKLM\SOFTWARE\Avisynth" /v "PluginDir+" /d "%REGPLUGDIR64PLUS%" /f
			if errorlevel 1 ( echo Error on importing registry keys!
				goto :error )
		)

		call :regWin
	) else (
		echo copying %avs% files to "%WINDIR%\SysWow64"...
		echo copy /y "%AVS_SRC_DIR%\%avs%\avisynth.dll" "%WINDIR%\SysWow64"
		copy /y "%AVS_SRC_DIR%\%avs%\avisynth.dll" "%WINDIR%\SysWow64"
		copy /y "%AVS_SRC_DIR%\%avs%\devil.dll" "%WINDIR%\SysWow64"
		if errorlevel 1 ( echo Failed to copy files to "%WINDIR%\SysWow64"
			goto :error )
		echo.
		echo Writing "HKLM\SOFTWARE\Wow6432Node\Avisynth" /v "" /d "%AVS_SRC_DIR%\%avs%"
		reg add "HKLM\SOFTWARE\Wow6432Node\Avisynth" /v "" /d "%AVS_SRC_DIR%\%avs%" /f
		echo.

		echo Writing "HKLM\SOFTWARE\Wow6432Node\Avisynth" /v "PluginDir2_5" /d "%REGPLUGDIR32%"
		reg add "HKLM\SOFTWARE\Wow6432Node\Avisynth" /v "PluginDir2_5" /d "%REGPLUGDIR32%" /f
		if errorlevel 1 ( echo Error on importing registry keys!
			goto :error )

		if "%REGPLUGDIR32PLUS%" GTR "" (
			echo.
			echo Writing "HKLM\SOFTWARE\Wow6432Node\Avisynth" /v "PluginDir+" /d "%REGPLUGDIR32PLUS%"
			reg add "HKLM\SOFTWARE\Wow6432Node\Avisynth" /v "PluginDir+" /d "%REGPLUGDIR32PLUS%" /f
			if errorlevel 1 ( echo Error on importing registry keys!
				goto :error )
		)

		call :regWow64
	)
)
goto :end

:regWin
echo.
echo adding more registry entries...
reg add "HKLM\SOFTWARE\Classes\AVIFile\Extensions\AVS" /ve /d "{E6D6B700-124D-11D4-86F3-DB80AFD98778}" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\CLSID\{E6D6B700-124D-11D4-86F3-DB80AFD98778}" /ve /d "AviSynth" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\CLSID\{E6D6B700-124D-11D4-86F3-DB80AFD98778}\InProcServer32" /ve /d "AviSynth.dll" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\CLSID\{E6D6B700-124D-11D4-86F3-DB80AFD98778}\InProcServer32" /v "ThreadingModel" /d "Apartment" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\Media Type\Extensions\.avs" /v "Source Filter" /d "{D3588AB0-0781-11CE-B03A-0020AF0BA770}" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\.avs" /ve /d "avsfile" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\.avsi" /ve /d "avs_auto_file" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\avsfile" /ve /d "AviSynth Script" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\avsfile\DefaultIcon" /ve /d "%WINDIR%\System32\AviSynth.dll,0" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\avs_auto_file" /ve /d "AviSynth Autoload Script" /f >nul 2>&1
if defined avspl (reg add "HKLM\SOFTWARE\Classes\avs_auto_file\DefaultIcon" /ve  /d "%WINDIR%\System32\AviSynth.dll,1" /f
	) else reg add "HKLM\SOFTWARE\Classes\avs_auto_file\DefaultIcon" /ve /d "%WINDIR%\System32\AviSynth.dll,0" /f
goto :eof

:regWow64
echo.
echo adding more registry entries (wow64 mode)...
reg add "HKLM\SOFTWARE\Classes\AVIFile\Extensions\AVS" /ve /d "{E6D6B700-124D-11D4-86F3-DB80AFD98778}" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Wow6432Node\Classes\CLSID\{E6D6B700-124D-11D4-86F3-DB80AFD98778}" /ve /d "AviSynth" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Wow6432Node\Classes\CLSID\{E6D6B700-124D-11D4-86F3-DB80AFD98778}\InProcServer32" /ve /d "AviSynth.dll" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Wow6432Node\Classes\CLSID\{E6D6B700-124D-11D4-86F3-DB80AFD98778}\InProcServer32" /v "ThreadingModel" /d "Apartment" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Wow6432Node\Classes\Media Type\Extensions\.avs" /v "Source Filter" /d "{D3588AB0-0781-11CE-B03A-0020AF0BA770}" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\.avs" /ve /d "avsfile" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\.avsi" /ve /d "avs_auto_file" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\avsfile" /ve /d "AviSynth Script" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\avsfile\DefaultIcon" /ve /d "%WINDIR%\SysWow64\AviSynth.dll,0" /f >nul 2>&1
reg add "HKLM\SOFTWARE\Classes\avs_auto_file" /ve /d "AviSynth Autoload Script" /f >nul 2>&1
if defined avspl (reg add "HKLM\SOFTWARE\Classes\avs_auto_file\DefaultIcon" /ve /d "%WINDIR%\SysWow64\AviSynth.dll,1" /f
	) else reg add "HKLM\SOFTWARE\Classes\avs_auto_file\DefaultIcon" /ve /d "%WINDIR%\SysWow64\AviSynth.dll,0" /f
goto :eof

:uninstall
echo.
echo Remove %avs% .dll and registry entries from this system?
set /p rm=[y/n]: 
if /i not [%rm%]==[y] goto :cancel
echo.
if defined winarch (
	if /i %avs%==AVSx64 ( echo Attempt to remove x64 AVS from x32 Windows.
		goto :cancel )
	echo removing %avs% files from "%WINDIR%\System32"...
	del "%WINDIR%\System32\avisynth.dll"
	del "%WINDIR%\System32\devil.dll"
	call :unregWin all
) else (
	if /i %avs%==AVSx64 (
		echo removing %avs% files from "%WINDIR%\System32"...
		del "%WINDIR%\System32\devil.dll"
		del "%WINDIR%\System32\avisynth.dll"
		if exist "%WINDIR%\SysWow64\avisynth.dll" (call :unregWin) else (
			call :unregWin all )
	) else (
		echo removing %avs% files from "%WINDIR%\SysWow64"...
		del "%WINDIR%\SysWow64\avisynth.dll"
		del "%WINDIR%\SysWow64\devil.dll"
		if exist "%WINDIR%\System32\avisynth.dll" (call :unregWow64) else (
			call :unregWow64 all )
	)
)
goto :end
	
:unregWin
echo.
echo removing registry entries...
reg delete "HKLM\SOFTWARE\Avisynth" /f
reg delete "HKLM\SOFTWARE\Classes\CLSID\{E6D6B700-124D-11D4-86F3-DB80AFD98778}" /f
reg delete "HKLM\SOFTWARE\Classes\Media Type\Extensions\.avs" /f
if [%1]==[all] call :unregAll
goto :eof

:unregWow64
echo.
echo removing registry entries (wow64 mode)...
reg delete "HKLM\SOFTWARE\Wow6432Node\Avisynth" /f
reg delete "HKLM\SOFTWARE\Wow6432Node\Classes\CLSID\{E6D6B700-124D-11D4-86F3-DB80AFD98778}" /f
reg delete "HKLM\SOFTWARE\Wow6432Node\Classes\Media Type\Extensions\.avs" /f
if [%1]==[all] call :unregAll
goto :eof

:unregAll
echo.
echo removing more avs registry entries...
reg delete "HKLM\SOFTWARE\Classes\AVIFile\Extensions\AVS" /f
reg delete "HKLM\SOFTWARE\Classes\.avs" /f
reg delete "HKLM\SOFTWARE\Classes\.avsi" /f
reg delete "HKLM\SOFTWARE\Classes\avsfile" /f
reg delete "HKLM\SOFTWARE\Classes\avs_auto_file" /f
goto :eof

:noAdmin
echo  This batch file must run with elevated privileges, so:
echo.
echo  Right click on it and chose "Run as administrator"
goto :end

:error
echo.
echo something went wrong...
echo.

:cancel
echo.
echo cancelled...
echo.

:end
endlocal
echo.
pause

Do you change the name of the folders as well?

[Emulgator]

Yes, you would match these folder names as given in script.
Or choose your own folder names and match script.

[LeXXuz]

I have another syntax question.

Is there any difference between these 3 script snips:

1)

PRE1=filter1()
PRE2=filter2(PRE1)
filter3(PRE2)

2)

filter1().filter2().filter3()

3)

filter1()
filter2()
filter3()

If so, I'd appreciate a thorough explanation.
It would help me to understand some of the more advanced scripts any better.

[DTL]

With 1) you keep 'last' unchanged untill 3rd line.

3) overwrite 'last' in each line.

[LeXXuz]

Originally Posted by DTL

With 1) you keep 'last' unchanged untill 3rd line.

3) overwrite 'last' in each line.

I see. So, if I'm only interested in what happens at the very end of those scripts after the last line, the output of all 3 is equivalent?

[VoodooFX]

Originally Posted by DTL

With 1) you keep 'last' unchanged untill 3rd line.

3) overwrite 'last' in each line.

I think there are other unseen "differences", like in caching behavior.

Anyway, why this thread is treated like "Ask any question about AvS" thread, when it's about AvS wiki?

[LeXXuz]

Originally Posted by VoodooFX

Anyway, why this thread is treated like "Ask any question about AvS" thread, when it's about AvS wiki?

My apologies. I misunderstood this thread. Will post questions about AVS somewhere else in future.

[Jawed]

Avisynth.org links in this post go to a host page, i.e. are no longer valid. Shouldn't they be fixed?

[Emulgator]

You may want to PM Wlbert https://forum.doom9.org/member.php?u=2705

[szabi]

I have multiple video in one avs and lots of trim.
I would like to identify which scene belongs to which video.
Is tere any syntax to display source's filmename?

[VoodooFX]

Originally Posted by szabi

I have multiple video in one avs and lots of trim.
I would like to identify which scene belongs to which video.
Is tere any syntax to display source's filmename?

Do NOT use this thread for discussion of specific Avisynth problems you may have. Post those in a separate thread. This thread is for suggesting new FAQs and discussing existing ones.