Bash shell script to pull video frame

[felle]

Hi guys.

I have this faulty script with a "Run Applescript (calculated):
"do shell script \"ffmpeg -i\" & videofile_field & \" -filter:v select=\"eq(n\,500)\" -vframes 1 thumbnail.jpg"

I can successfully run the command in Terminal (without the filemaker field entry off)
It extract frame number 500 of any video file and makes a jpg of it. I use my home directory for this because its easier.

I'm hoping you can help me with my script. I think its difficult to make bash commands in filemaker but thats life i guess.
(i'm running Filemaker Pro 13 on MacOS 10.12)

 

Edited October 13, 2016 by felle

[normanicus]

I used this:

BE_ExecuteSystemCommand

Which is provided by the Base Elements free plugin. Description here:

https://baseelementsplugin.zendesk.com/hc/en-us/articles/205350557-BE-ExecuteSystemCommand