Virtualdub does not have a dedicated fast-preview option. The only way to fast-preview, without giving up on normal preview, is to hold down the arrow key. I find this a little inconvenient and slow.
Here is an Autohotkey script to simulate fast-forward and fast-rewind in Virtualdub. It uses the aforementioned key hold-down method but Autohotkey seems to be capable of sending keystrokes much faster than the physical keyboard; at least it does on my computer.
SingleInstance
#MaxThreadsPerHotkey 2
#NoEnv ; Recommended for performance and compatibility with future AutoHotkey releases.
SendMode Input ; Recommended for new scripts due to its superior speed and reliability.
vdubLeftDown:=false
vdubRightDown:=false
#IfWinActive, ahk_class VirtualDub
;fast forward toggle
e::
global vdubLeftDown
global vdubRightDown
vdubLeftDown:=false
vdubRightDown:=!vdubRightDown
while vdubRightDown
{
if (WinActive("ahk_class VirtualDub"))
send, {Right down}
else
break
;Sleep, 50
}
send, {Right Up}
return
;fast backward toggle
q::
vdubRightDown:=false
vdubLeftDown:=!vdubLeftDown
while vdubLeftDown
{
If (WinActive("ahk_class VirtualDub"))
send, {Left down}
else
break
;Sleep, 50
}
send, {Left Up}
return
w::
vdubLeftDown:=false
vdubRightDown:=false
return
#IfWinActive
How to use
Shortcut | Function |
---|---|
e | Toggle fast-forward |
q | Toggle fast-rewind |
w | Stop fast-preview |
The script will preview as fast as your computer allows. If you are in the happy situation where the preview is too fast, comment out the Sleep function and add an appropriate delay.