"could not be opened for reading: open file error" on mkvmerge CLI

[naoto89]

I need to add two language audio tracks to several MKV files that already have their own original audio and several SRT subtitles.

I wrote this command line to run it in a batch file.

@ECHO OFF

chcp 65001

set mkvmerge=M:\FS\NF\mkvmerge.exe
set input=M:\FS\NF\Original
set AESP=M:\FS\NF\AESP
set AKOR2=M:\FS\NF\AKOR2
set output=M:\FS\NF\New
FOR %%f in ("%input%\*.mkv") DO (

	"%mkvmerge%" --output ^"%output%\%%~nf.mkv^"	--language 0:und --default-track 0:yes	--language 1:kor --track-name ^"1:Coreano ^(NF HK version^)^" --default-track 1:yes --language 2:ara --language 3:ger --language 4:eng --language 5:fre --language 6:tur --language 7:vie --language 8:chi --track-name 8:Simplified --language 9:chi --track-name 9:Traditional ^"^(^" ^"%%f^" ^"^)^" --language 0:spa ^"^(^" ^"%AESP%\%%~nf_ESP.flac^" ^"^)^" --language 0:kor --track-name ^"0:Coreano ^(TV version^)^" ^"^(^" ^"%AKOR2%\%%~nf_KOR.flac^" ^"^)^" --track-order 0:0,0:1,0:2,0:3,0:4,0:5,0:6,0:7,0:8,0:9,1:0,2:0
)
PAUSE>NUL
EXIT

However, I only get a message like this in CMD.

mkvmerge v75.0.0 ('Goliath') 32-bit
Error: The file 'M:\FS\NF\AKOR2\EP 01_KOR.flac' could not be opened for reading: open file error.

I don't understand what the problem is. The paths are correct and even the filenames are simple and barely have a single space in the name, that's why I'm using quotes.

[jagabo]

Remove the first line to help you see the problem.

[naoto89]

Remove the first line and you'll see the problem immediately.

Although I removed the @ECHO OFF to see the full paths It took me a while to notice that there was a problem with the Korean language audio files after I tried muxing one language per session instead of both together.

M:\FS\NF>set mkvmerge=M:\FS\NF\mkvmerge.exe

M:\FS\NF>set input=M:\FS\NF\Original

M:\FS\NF>set AESP=M:\FS\NF\AESP

M:\FS\NF>set AKOR2=M:\FS\NF\AKOR2

M:\FS\NF>set output=M:\FS\NF\New

M:\FS\NF>FOR %f in ("M:\FS\NF\Original\*.mkv") DO ("M:\FS\NF\mkvmerge.exe" --output "M:\FS\NF\New\%~nf.mkv" --language 0:und --default-track 0:yes      --language 1:kor --track-name "1:Coreano (NF HK version)" --default-track 1:yes --language 2:ara --language 3:ger --language 4:eng --language 5:fre --language 6:tur --language 7:vie --language 8:chi --track-name 8:Simplified --language 9:chi --track-name 9:Traditional "(" "%f" ")" --language 0:spa "(" "M:\FS\NF\AESP\%~nf_ESP.flac" ")" --language 0:kor --track-name "0:Coreano (TV version)" "(" "M:\FS\NF\AKOR2\%~nf_KOR.flac" ")" --track-order 0:0,0:1,0:2,0:3,0:4,0:5,0:6,0:7,0:8,0:9,1:0,2:0 )

M:\FS\NF>("M:\FS\NF\mkvmerge.exe" --output "M:\FS\NF\New\EP 01.mkv" --language 0:und --default-track 0:yes      --language 1:kor --track-name "1:Coreano (NF HK version)" --default-track 1:yes --language 2:ara --language 3:ger --language 4:eng --language 5:fre --language 6:tur --language 7:vie --language 8:chi --track-name 8:Simplified --language 9:chi --track-name 9:Traditional "(" "M:\FS\NF\Original\EP 01.mkv" ")" --language 0:spa "(" "M:\FS\NF\AESP\EP 01_ESP.flac" ")" --language 0:kor --track-name "0:Coreano (TV version)" "(" "M:\FS\NF\AKOR2\EP 01_KOR.flac" ")" --track-order 0:0,0:1,0:2,0:3,0:4,0:5,0:6,0:7,0:8,0:9,1:0,2:0 )
mkvmerge v75.0.0 ('Goliath') 32-bit
Error: The file 'M:\FS\NF\AKOR2\EP 01_KOR.flac' could not be opened for reading: open file error.

I had not noticed that in the file names there was a space in the middle of the number and underscore. Before opening this thread the files I was trying to mux had other longer names and even folders had other names, I made sure that everything could match to make it work and yet I had the same problem.

[naoto89]

Hello again. I want to come back to this thread because I have this problem again.

Unlike the previous case that was solved, now mkvmerge can open files despite having correctly assigned path variables and check that all files had the same names. I modified the batch file several times but still get the same error.

set extVID=.mkv
set extAUD=.flac
set mkvmerge=%~dpn1mkvmerge.exe
set invid=%~dp1.\MKV
set inaud=%~dp1.\AUDFLAC
set chap=%~dp1.\CHAPTERS
set outvd=%~dp1.\NEW
FOR %%f in ("%invid%\*%extVID%") DO (

	"%mkvmerge%" --output ^"%outvd%\%%~nf%extVID%^" ^
		--language 0:und ^
		^"^(^" ^"%%f^" ^"^)^" ^
		--language 0:und ^
		^"^(^" ^"%inaud%\%%~nf%extAUD%^" ^"^)^" ^
		--chapters ^"^(^" ^"%chap%\%%~nf.txt^" ^"^)^" ^
		--track-order 0:0,1:0
)

this appears when run it

mkvmerge v75.0.0 ('Goliath') 32-bit
Error: Could not open '(' for reading.

I made a batch file to mux with ffmpeg using similar variables and the file path (except add chapters because I don't know how to do it) is the same and it works.

set extVID=.mkv
set extAUD=.flac
set "ffmpeg=%~dpn1.\ffmpeg.exe"
set entradaVID=%~dp1.\MKV
set entradaAUD=%~dp1.\AUDFLAC
set chapter=%~dp1.\CHAPTERS
set salida=%~dp1.\NEW
FOR %%V in (%entradaVID%\*%extVID%) do %ffmpeg% ^
  -i "%%V" ^
  -i "%entradaAUD%\%%~nV%extAUD%" ^
  -strict experimental ^
  -c:v copy ^
  -c:a copy ^
  "%salida%\%%~nV%extVID%"

The code that I use in mkvmerge is the same as in the previous case, it cannot be that it doesn't work.