Command line program NEEDS its name at start of parameters

[Seymour Clufley]

I'm using SoX on Windows to mix multiple audio files into one. The code is normal:

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prog = RunProgram(#Sox,param$,"P:\sox_exper\",#PB_Program_Open|#PB_Program_Read|#PB_Program_Error)

where param$ variable is:

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-m "|sound1.wav -p -v 1.00" "|sound2.wav -p -v 0.50" "P:\sox_exper\mix.wav"

The param$ uses pipes because I want to augment each file (changing its volume) before mixing them together.

Unfortunately, I'm getting a SoX error:

FAIL formats: can't open input pipe `|tophat.wav -p -v 0.50': premature EOF

Apparently this is happening because SoX requires the word "sox" at the start of each pipe.

I was aware that PB doesn't like that, but I tried it anyway. I changed the param$ variable to:

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-m "|sox sound1.wav -p -v 1.00" "|sox sound2.wav -p -v 0.50" "P:\sox_exper\mix.wav"

This results in the error message:

'sox' is not recognized as an internal or external command

I suspect this is to do with Windows vs. Linux. Does anyone have any ideas of a workaround?

[mrv2k]

Assuming that the command line works from a DOS prompt, you'd need to format it like this

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param$="-m "+#DOUBLEQUOTE$+"|sox sound1.wav -p -v 1.00"+#DOUBLEQUOTE$+" "+#DOUBLEQUOTE$+"|sox sound2.wav -p -v 0.50"+#DOUBLEQUOTE$+" "+#DOUBLEQUOTE$+"P:\sox_exper\mix.wav"+#DOUBLEQUOTE$

This gives me...

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-m "|sox sound1.wav -p -v 1.00" "|sox sound2.wav -p -v 0.50" "P:\sox_exper\mix.wav"

... as the parameter.

I've found it's best to test on a DOS prompt and mirror the command into Purebasic. Also having a console window running can help too.

[Seymour Clufley]

Thank you, Mrv2k, but the formatting you suggest is exactly the formatting that I'm trying, and which is raising the error:

'sox' is not recognized as an internal or external command

[Marc56us]

Try with escape sequence, like this:

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param$ = ~"-m \"|sound1.wav -p -v 1.00\" \"|sound2.wav -p -v 0.50\" \"P:\\sox_exper\\mix.wav\""

But IMHO this is the pipe (|) that cause problem to RunProgram() function.

Alternative: Create a batch file and run it with cmd / c

[pf shadoko]

I am not a great command line specialist but it seems to me that quotes are useful for words that may contain spaces,
so often the paths
I'd rather see this:
param$ = ~"-m| \"sound1.wav\" -p -v 1.00| \"sound2.wav\" -p -v 0.50 \"P:\\sox_exper\\mix.wav\""
or even, in this case, without quotes.

[infratec]

RunProgram() runs a program directly.

A pipe is a 'command' of the 'shell'.
It can only work if you run the 'shell'

You need to run
'cmd' with parameters '/C sox -m | ...| ..'

[kenmo]

Is #Sox a full path to the program?

Try this before the RunProgram()

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SetEnvironmentVariable("PATH", GetEnvironmentVariable("PATH") + ";" + GetPathPart(#Sox))

[ChrisR]

The volume must be specified before the audio file

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sox -m "|sox -v 1 Ring03.wav -p" "|sox -v 0.5 Ring08.wav -p" Ring.wav

It looks good with

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SetCurrentDirectory("E:\Temp\sox")
param$ = "-m  " + #DQUOTE$ + "|sox -v 1 Ring03.wav -p" + #DQUOTE$ + " " + #DQUOTE$  + "|sox -v 2 Ring08.wav -p"  + #DQUOTE$ + " Ring.wav"
RunProgram("Sox.exe",  param$, GetCurrentDirectory(), #PB_Program_Open|#PB_Program_Read|#PB_Program_Error)

It works also without pipe

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SetCurrentDirectory("E:\Temp\sox")
param$ = "-m -v 1 Ring03.wav -v 2 Ring08.wav Ring.wav"
RunProgram("Sox.exe",  param$, GetCurrentDirectory(), #PB_Program_Open|#PB_Program_Read|#PB_Program_Error)

[Seymour Clufley]

Thank you for everyone's help here. I was relieved to find (from ChrisR) that the job could be done without piping at all.