[MEncoder-users] Encoding iPhone MOV into MPEG-2 -- Video framerate is super fast!?

[L Lee]

On 11/11/09 10:08 AM, "Jarred Nicholls" <jarred.nicholls at gmail.com> wrote:

> I'm on debian/ubuntu, but I run os x on my dev box.  I can convert any
> script to a bash/ruby/python/etc. script so maybe just having the workflow
> would be helpful, thanks!  I am unfamiliar with the ffmpeg/sox workflow, I
> wasn't on the list until yesterday.  What was the subject titled?  I can
> search for it in the archives.

Separating each of the 6 channels of ac3 file into separate wav files
http://thread.gmane.org/gmane.comp.video.mencoder.user/10568/focus=10574

The AppleScript droplet requires that you have recent versions of ffmpeg,
sox, and mediainfo cli executables installed. It will require reworking to
adjust anything but tempo because it calculates the sox tempo adjustment
factor by subtracting the inappropriate delay observed near the conclusion
of the source video from the actual duration and then dividing the actual
duration by the difference. The factor for sox tempo adjustment is larger
than 1 for audio that needs to be sped up.

property newline : ASCII character 10
property tmpfile : "/tmp/execme.command"

on open filelist
    set afile to item 1 of filelist
    set targetstring to (quoted form of POSIX path of afile)
    set initval to (word -1 of (do shell script "/usr/local/bin/mediainfo -f
" & targetstring & " | grep -m 1 Duration")) as text
    set adjustval to text returned of (display dialog "How much too long is
the original audio in milliseconds?" default answer 1000)
    set calcval to initval / (initval - adjustval)
    set i to afile as alias
    tell application "Finder" to set P to i's container as text
    set n to (info for i)'s name
    my replace_chars(n, ".ac3", "_adjusted.ac3")
    set output_file to POSIX path of (P & result)
    set outputfile to (quoted form of output_file)
    set theShellScript to "ffmpeg -v 0 -i" & space & targetstring & space &
"-f sox - | /usr/local/bin/sox -S -V -p -p tempo" & space & calcval & space
& "| /usr/local/bin/ffmpeg -v 0 -i - -acodec ac3 -ab 448000 -y" & space &
outputfile
    delay 1
    do shell script "echo " & quoted form of theShellScript & " > " &
tmpfile
    repeat
        try
            do shell script "chmod +x " & tmpfile
            do shell script "open -a Terminal.app" & space & tmpfile
            exit repeat
        on error
            delay 1
        end try
    end repeat
end open

on replace_chars(this_text, _bad, _good)
    set AppleScript's text item delimiters to the _bad
    set the item_list to every text item of this_text
    set AppleScript's text item delimiters to the _good as string
    set this_text to the item_list as string
    set AppleScript's text item delimiters to ""
    return this_text
end replace_chars

--
Laine Lee