How do I make a video play backwards on virtual dub?

[Hiku]

I've tried most settings and options I could think of, but I never got it to work.

Also, I'd like to know if there is a way to make only a specific section of the clip run backwards, and not all of it?

Thanks in advance.

[jaxxboss]

Turn ur screen upside down

[Hiku]

Not upside down, but backwards.

For example, if bullets are shot at a wall in a scene, I'd like to make the bullets fly back out of the wall and into the gun.

[Safesurfer]

Not possible with VDub. You can however do it with AviSynth and import the script into VDub. The command is Reverse().

[Hiku]

Okay thanks. I'll try that then.

[jaxxboss]

LOL, I know. If you turn ur screen upsidedown then the action moves the opposite way. Nevermind, u missed the rimshot and baddabing on it.

Heres a long convoluted way to do it, altho there is prolly an easier way that someone will come up with.

Burn to disc, play on ur dvd player thru ur vcr while taping it. Then play the tape in reverse while capturing it on ur computer.

[Hiku]

Hmm okay. Is there any easier way than AviSynth?
I tried it, and I can't really understand what to do. *_*

Is thjere a program where I can run the actual video file while making it go reverse, rather than editing scripts in text format and such?

[Baldrick]

Install avisynth.
open notepad
type

DirectShowSource("c:\video.avi")
Reverse()

save as video.avs

open it in Virtualdub

[Hiku]

Thanks, I got it to work now. Though the frame rate seems a bit jumpy. Maybe it'll be normal once I save the avi clip.

[Baldrick]

maybe use avisource("file.avi") instead of directshowsource
or specify the framerate in directshowsource("video.avi",25fps)


i'm no avisynth expert......just guessing...

[Hiku]

Where exactly in the text do I put in the framerate? Could you insert it here as an example?

DirectShowSource("C:\Documents and Settings\Hiku\My Dokuments\Media Test\Clip 1.avi")

[redwudz]

DirectShowSource("C:\Documents and Settings\Hiku\My Dokuments\Media Test\Clip 1.avi", 25fps)

And if you go to their site, there are tutorials. I'm just learning about the program also.

http://www.avisynth.org/

[gadgetguy]

There may not be a problem at all with the framerate. Keep in mind that VDub is not designed to be a player and the "Reverse" command in AviSynth takes more "effort" than any of the more linear commands. Go ahead and save the avi (or a segment of it) and see how it plays.

[Safesurfer]

Reversing the video will also reverse the Field order which may account for the jerkiness. I would download the following plugin ReverseFieldDominance and place it in the Plugins folder under AviSynth. Your script should then be:-

AviSource("C:\Documents and Settings\Hiku\My Dokuments\Media Test\Clip 1.avi")
Reverse() # This reverses the video via AviSynth
ReverseFieldDominance() # The default is Shift up one line

[gadgetguy]

I usually use AssumeTFF() to correct the field order, but my source is usually DV from my camcorder (so I know my source is BFF).

[celtic_druid]

You will also want to look up the trim() command since you only want to reverse part of the clip.

part1 = trim(video,0,500).reverse()
part2 = trim(video,501,0)
return part1+part2
etc.