StdoutRead not working for me

[fraizor]

Hello

i am trying to run image magick then get the result of the compare process 

 

#include <AutoItConstants.au3>
#include <Array.au3>

; Compare
$iPID = Run("magick compare -metric RMSE 1.jpg 2.jpg NULL:","", @SW_SHOW, $STDOUT_CHILD)

; Wait until the process has closed using the PID returned by Run.
ProcessWaitClose($iPID)

; Read the Stdout stream
$ScreenOutput = StdoutRead($iPID)

MsgBox(0,0,$ScreenOutput)

 

i have 2 questions:

1- why the console (logs) is always writing the result even that i didn't used  console write function 

2- why msg box is empty ? 

Edited July 14, 2022 by fraizor

[water]

Please provide more information:

• Post the output you get when you run "magick" in a DOS window
• @SW_SHOW isn't a valid flag  for the Run statement
• Check for error after each function. Run sets @error
•  Check the length of $ScreenOutput using StringLen to make sure the string is empty

[fraizor]

Hello

thank you for fast response 

1- 

 

2- Okay what i should use ? i don't really care if it is showed or hidden 

 

3- sorry i don't know how to do that .. can you please edit my example to teach me how ? 

 

4- string len returns 0

[fraizor]

52 minutes ago, water said:

Please provide more information:

• Post the output you get when you run "magick" in a DOS window
• @SW_SHOW isn't a valid flag  for the Run statement
• Check for error after each function. Run sets @error
•  Check the length of $ScreenOutput using StringLen to make sure the string is empty

Actually the strange thing that it is working but in an unexpected way !

 

it is showing the correct output in the console , but not showing in msgbox ! 

 

[water]

Modified Script: 

#include <AutoItConstants.au3>

; Compare
Global $iPID = Run("magick compare -metric RMSE 1.jpg 2.jpg NULL:", "", Default, $STDOUT_CHILD)
If $iPID = 0 Then Exit ConsoleWrite("Error running Magick! @error=" & @error & ", @extended=" & @extended & @CRLF)

; Wait until the process has closed using the PID returned by Run.
Global $iWait = ProcessWaitClose($iPID)
If $iWait = 0 Then Exit ConsoleWrite("Error returned by ProcessWaitClose! @error=" & @error & ", @extended=" & @extended & @CRLF)

; Read the Stdout stream
Global $sScreenOutput = StdoutRead($iPID)
If @error Then Exit ConsoleWrite("Error returned by StdOutRead! @error=" & @error & ", @extended=" & @extended & @CRLF)

MsgBox(0, 0, $sScreenOutput)

 

Edited July 14, 2022 by water

[fraizor]

4 minutes ago, water said:

Modified Script: 

#include <AutoItConstants.au3>

; Compare
Global $iPID = Run("magick compare -metric RMSE 1.jpg 2.jpg NULL:", "", Default, $STDOUT_CHILD)
If $iPID = 0 Then Exit ConsoleWrite("Error running Magick! @error=" & @error & ", @extended=" & @extended & @CRLF)

; Wait until the process has closed using the PID returned by Run.
Global $iWait = ProcessWaitClose($iPID)
If $iWait = 0 Then Exit ConsoleWrite("Error returned by ProcessWaitClose! @error=" & @error & ", @extended=" & @extended & @CRLF)

; Read the Stdout stream
Global $sScreenOutput = StdoutRead($iPID)
If @error Then Exit ConsoleWrite("Error returned by StdOutRead! @error=" & @error & ", @extended=" & @extended & @CRLF)

MsgBox(0, 0, $sScreenOutput)

 

Thank you @water

 

actually now i get the issue 

 

for some reason the imagemagick is returning the result in form of error ! 

 

 

 

even in CMD i tried to write the output to a file but it have me empty file , when i write the error to a file it will show the result there in output.err

 

[water]

Replace $STDOUT_CHILD with $STDERR_MERGED to get both streams when you read Stdout.

[fraizor]

3 minutes ago, water said:

Replace $STDOUT_CHILD with $STDERR_MERGED to get both streams when you read Stdout.

I love you @water thank you very much , $STDERR_MERGED  did solve the issue 

[water]