Encoding in reverse direction

[Someguy2]

Does anyone know of a encoder or program that will encode a WMV in reverse? I would like to take a 30 second wmv and reverse it at the end to make it a total of 60 seconds long. I want to do this so it can be looped and used as a dreamscene in Windows Vista.

[guns1inger]

You need to use an editor to do this, not an encoder. Windows Movie Maker will do it. Add the video to the timeline twice, and reverse the second instance.

[pcspeak]

I had a try. And it worked. These were the steps.
Download and install Virtualdub.
Download and install AVISynth.

This next bit will probably be different for your clip.

Create an AVS script 'clip.avs', containing the following line and open it in Virtualdub.
directshowsource("clip.wmv", fps=25, convertfps=true, audio=true)

'File/Save as AVI' 'forward.avi'.

Create a script file, 'reverse.avs' containing the following 2 lines and open it in Virtualdub.
AVISource("forward.avi")
Reverse()

'File/Save as AVI' 'reverse.avi'.

Now you have the two files, one playing forward and the other playing in backwards.

Open forward.avi in Virtualdub. Go to the menu 'File/Append AVI segment'.
Locate and open reverse.avi.
'File/Save as AVI' 'bothways.avi'

This is it. Shortest WMV clip I had. No apologies for the content.
[
Edit: Some of my post slightly redundant. So I deleted it.

bothways-xvid.avi

[manono]

You can do that in one script (and without encoding the 2nd part twice), but I would guess that Someguy2 doesn't know the first thing about AviSynth:

A=directshowsource("clip.wmv", fps=25, convertfps=true, audio=true)
B=A.Reverse()
A+B

I don't have any WMV stuff on which to test, but it (or some variation of it) should work.

[pcspeak]

Yes. It works. It's elegant. I'm slightly in awe.
Thanks

[guns1inger]

Yes. It works. It's elegant. I'm slightly in awe.
Thanks

He tends to do that to people - the bastard !

[Someguy2]

You need to use an editor to do this, not an encoder. Windows Movie Maker will do it. Add the video to the timeline twice, and reverse the second instance.

What version of Windows Movie Maker are you refering to? I can not fiqure out how to reverse the clip with the version of Windows Movie Maker that Vista Ultimate comes with.

[guns1inger]

Looks like Movie Maker wont do it after all. What I thought was a reverse effect is only a mirror on the y axis.

Use Manono's avs script instead. Much quicker.

[ks47]

If you need further help using the Avisynth, especially someone new to the program, how to script for reverse or play backwards in video tutorial form, you can find it here:

http://www.youtube.com/watch?v=6uNMSQRNK0Y

TS