Ejecutando FFmpeg en Automator/AppleScript

Una consideración importante cuando se programa es elaborar un plan para depurar su código. Así es como yo habría codificado el código para la depuración.

Es difícil depurar un controlador abierto. Añado un manejador en ejecución donde puedo manipular la entrada de una rutina común que se llama en ejecución y en abierto. Para tu información: Corregí cómo se procesaba la entrada de en abierto.

(* 
   AskDifferent question:
     https://apple.stackexchange.com/questions/366992/running-ffmpeg-in-automator-applescript
 Use log statements.

 It is easier to diagnose problems with debug information. I suggest adding log statements to your script to see what is going on.  Here is an example.

For testing, run in the Script Editor.
    1) Click on the Event Log tab to see the output from the log statement
    2) Click on Run

 *)
on run
    --  debug lines
    set desktopPath to (path to desktop) as string

    -- here is a log statment.
    log "desktopPath = " & desktopPath

    -- Be sure to select a file on your DESKTOP.
    set see to alias (desktopPath & "auto-show-2015.mp4")

    -- Simulate dropped items list.
    set dropped_items to {see}

    common(dropped_items)

end run

-- Gets invoked here when something is dropped on this AppleScript icon

on open dropped_items

    common(dropped_items)

end open

on common(dd)

    repeat with d in dd
        set d to d's contents
        log d
        tell application "Finder"
            --set seq1 to (d's file 1 as alias)  -- dropped items come in as an array of aliased items. 
            set seq1 to d
            set dparent to d's container as alias
            set mov to "" & dparent & (dparent's name) & ".mov"
            log "mov is " & mov
        end tell

        set toUnix to "d=" & d's POSIX path's quoted form & " /opt/local/bin/ffmpeg -r 25 -f image2 -i \"" & seq1 & "\" '*.JPG' -codec:v prores_ks -profile:v 0 \"" & dparent & ".mov\" && exit
    "
        log "toUnix is " & toUnix
        set fromUnix to do shell script toUnix
        log "fromUnix is " & fromUnix
    end repeat
end common