Runwait comspec problem escaping characters

[kakashi524]

It's been a while since I've been back, mostly because I haven't been scripting much. But now I find myself trying to convert quite a few movies and I finally decided to script a process to save some time. The problem I find myself in, is that I try to do the conversion using FFMPEG but I get errors while trying to run the commands using RUNWAIT and COMSPEC.

The line of code that's giving me a hard time is:

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audioLn:=RunWait %comspec% /c ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "F:\Audio.mp3"

The code outside of AHK is:

Code: Select all

ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "F:\Audio.mp3"

What this code do is retrieve the Length of a media file in seconds, and store it in the audioLn variable. For example 1253.78. I need that number so I can either straight mux the video and audio OR, if needed, stretch or shrink the audio to match the video length.

I either get errors at the : or at the =1

I tried to use ":" but the I get error at =1, if I try "=1" I still get errors. How do I escape those characters or is there any other way to run that code and get the time?

[swagfag]

Code: Select all

CMD = %A_ComSpec% /q /c ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "F:\Audio.mp3"
MsgBox % ComObjCreate("WScript.Shell").Exec(CMD).StdOut.ReadAll()

[Jovannb]

Hi,

that does the trick:

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; ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "F:\Audio.mp3"

shellstring:="ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 " chr(34) "F:\Audio.mp3" chr(34)
run, %comspec% /c %shellstring%,,hide

Debug that "shellstring", than you see whats in there...

J.B.

[kakashi524]

Thanks for the quick replies to my cry for help:

@Jovannb, I tried your approach and it does not cause any error, but it didn't work for me. Maybe I made a mistake somewhere along the way. I would still like to thank you for taking your time.
@swagfag, I adapted your code and it worked, thanks.

Code: Select all

audioLn = %A_ComSpec% /q /c ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "%audio%"
audioLn := ComObjCreate("WScript.Shell").Exec(audioLn).StdOut.ReadAll()