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View Full Version : using an external editor to invert a frame sequence



Rogue (Flat Earth)
07-30-2009, 03:24 AM
Is it possible? I know Virtual Dub doesn't let me (but it's a simplistic editor, granted)....

does anyone here have an external editor that can take a sequence of frames and invert their order (so that, basically, the scene plays from end to start)?

Uber
07-30-2009, 03:28 AM
well, i know windows movie maker lets the video clip run backwards.

Rogue (Flat Earth)
07-30-2009, 03:32 AM
but does it SAVE it as such? I don't need to see it backwards... I need to save it so and paste it that way into the movie

Uber
07-30-2009, 03:47 AM
of course, saves as a wmv file

Rogue (Flat Earth)
07-30-2009, 04:04 AM
Awesome
ummm
I hate to sound like an idiot but... how do I make it play backwards?

Uber
07-30-2009, 04:29 AM
maybe you should look at the video effects for the one that says backwards.

Rogue (Flat Earth)
07-30-2009, 04:44 AM
Actually, my WMM doesn't offer that effect for some reason :(

thebiz
07-30-2009, 09:09 AM
You are correct, WMM has no reverse functionality. Heres a way to do it frame by frame...

http://www.youtube.com/watch?v=O4NBP0UFm3c

There seems to be some free software out there that will do it but watch out for malicious downloads. Might be better off grabbing some decent software fro less than $50 (theres somethreads floating about) that can do a multitude of nifty tricks. Im mildly happy with magix.

Rogue (Flat Earth)
07-30-2009, 09:22 AM
was hoping to avoid doing it frame by frame... we're talking a specific 11 seconds long clip... you do the math 11X24.... urgh... I hate math *hits head against the wall*

Is anyone out here with a program capable of doing this willing to reverse a clip for me?

thebiz
07-30-2009, 09:27 AM
If noone hooks you up in the next 7 hours I'll try to help you out tonight. Shoot me a pm later today with your email address if your still in need.

rileyman
07-30-2009, 04:19 PM
Actually, you can do this in VirtualDUB... it's just that you might not like the way you have to do it.

If you think you're up to it:


Download and install AviSynth (http://avisynth.org/mediawiki/Main_Page).
Open up any old text editor (eg. Notepad) and type:

DirectShowSource("C:\pathtoyourvideo.avi")
Reverse()
Save this out to a file with a *.avs extension. (In the "files of type" drop-down, choose "All Files (*.*); if you don't, Notepad will try to save it as a *.txt file)
Open the aforementioned *.avs file in VirtualDUB
Set the compression options as you want them, and save out to AVI again

Rogue (Flat Earth)
07-30-2009, 04:35 PM
It actually wasn't hard to follow but I got a "Video DeSync" error on V-Dub and the movie is stuck on the first frame

rileyman
07-30-2009, 06:17 PM
That's likely to do with the compression format in the original AVI file. (It is an AVI you're working with, right?)

Either replace "DirectShowSource" with "AVISource" in the script, and see if that does it.
Or you'll first need to convert the original AVI into a compression format that compresses on a per-frame basis (or just raw uncompressed).

Rogue (Flat Earth)
07-30-2009, 06:41 PM
Doing both things together (replacing the script with AVISource and using a raw uncompressed version) did the trick :)

Thank you ever so much, Riley :D