Advanced Encoding Using Avisynth
Avisynth is a frame-server. It takes a video file, processes it
as you want and then feeds it to other encoders as a pseudo-avi with
uncompressed video and audio (there is no actual avi file created).
It has some of the best filters for cleaning up/"improving"
videos and they work much faster than the ones in virtualdub.
It is a script written in notepad and saved as a avs file. If you have
ever used basic, this should be straightforward for you.
Virtualdub MOD is able to use templates for loading videos using
avisynth. It is much more complex to use than VirtualDub. We shall use
it only for creating avisynth scripts automatically.
Preliminary setup
Software needed
Avisynth 2.08 (Win 98,ME?)or 2.5.5(WinXP,2000?)-download from download
link at
http://www.avisyth.org
Run exe file to install.
Link to Virtualdub Mod
http://prdownloads.sourceforge.net/virtualdubmod/VirtualDubMod_1_5_10_1_All_inclusive.zip
Extract zip file into new folder and create a desktop shortcut
for the vdubmod exe file.
Download following plugins for Avisynth 2.08extract the dll files and
the help/settings files into your avisynth plugins folder. Other files
are source code and not needed.
http://www.avisynth.org/warpenterprises/files/convolution3d_20_dll_20021019.zip
http://www.avisynth.org/warpenterprises/files/greedyhma_20_dll_20011103.zip
http://www.avisynth.org/warpenterprises/files/mpasource_20_dll_20030415.zip
http://www.avisynth.org/warpenterprises/files/mpeg2dec_20_dll_20010816.zip
http://www.avisynth.org/warpenterprises/files/imagesequence_20_dll_20030507.zip
http://www.avisynth.org/warpenterprises/files/xlogo_20_dll_20030418.zip
or Download following plug-ins for avisynth2.5.5-extract the dll files
and the help/settings files into your avisynth plugins folder. Other
files are source code and not needed.
http://www.avisynth.org/warpenterprises/files/ac3source_25_dll_20030126.zip
http://www.avisynth.org/warpenterprises/files/greedyhma_25_dll_20030728.zip
http://www.avisynth.org/warpenterprises/files/imagesequence_25_dll_20030507.zip
http://www.avisynth.org/warpenterprises/files/mpasource_25_dll_20031214.zip
http://www.avisynth.org/warpenterprises/files/mpeg2dec_25_dll_20030107.zip
http://www.avisynth.org/warpenterprises/files/removedirt_25_dll_20040213.zip
http://www.avisynth.org/warpenterprises/files/xlogo_25_dll_20030630.zip
http://www.avisynth.org/warpenterprises/files/convolution3d_25_dll_20030422.zip
There are a lot of other plugins-the above will be sufficient for
this tutorial.
Click on auxsetup.exe either in your Virtualdub Mod folder or your
Virtualdub MPEGfolder-click on the install handler button and finish
process to enable frameserving from all versions of vdub you have!!
Also download following virtualdub plugins and extract the vdf files to
your virtualdub MPEG2 plugins folder (not in vdub mod!!)
http://neuron2.net/logo14.zip
http://eodvdf.narod.ru/AutoLevels.rar
Using Virtualdub Mod to create
avisynth files
1. File-Open Video File
2.To load a mpg or a vob select DirectShowSource from the dropdown box
as shown
and then select your mpg or vob.
The file will load as an avisynth file after creating the avs file. The
avs file will be in the same file as your video.
If your file is video.xxx, the avs file will be
video--DirectShowSource.avs.
Avis can be loaded using AviSource (some video codecs need
DirectShowSource).
Look in the Docs folder-English subfolder for the file
corefilters.html. It will give you details of all built-in filters of
avisynth.
Try practising scripting-by adding to the avs files generated above.
We will use two types of files-
avst files go into your templates folder of virtualdub mod
avsi files go into plugins folder of avisynth.
Download
Cleaningfunction
templateforcleaningavi
mpgcleaner
You will get avicleaner and mpgvobcleaner in the dropdown list of
avisynth templates in virtuaaldubmod.
Virtualdub plugins can be loaded via avisynth. Problem is that
they cause crash when used in my 98 with Avisynth 2.5.5(probably in ME
also). They work perfect in my XP (probably in 2000 as well). If
you want to use virtualdub plugins in 98 (ME?)-you need to use
2.08-problem with 2.08-can't load both video and audio from mpg
and vobs with DirectShowSource and can't load ac3 audio
(Dolby audio).
The following slightly roundabout way can use vdub plugins as well as
builtin filters of vdub but will slow down encoding with 2.5.5. If you
have 98(or ME) and a slow PC and want to use virtualdub plugins in
avisynth, you can, using avisynth 2.08 (downloadable from same site)
but procedure is not simple. You have to seperate the audio and the
video and load them in avisynth.
With XP you can use virtualdub plugins in Avisynth 2.5.5 and need not
adopt following complex route.
For details see
Advanced Avisynth
Intro to advanced encoding
with Avisynth:
1.Load your mpg or vob in Virtualdub MPEG2.
2.Click on Video-Filters to get dialog box as follows
3.If video looks washed out (faded colors) or too dark-highlight
Autolevels and click OK to get following dialog box
Click Show Preview. If vid is too bright, reduce MaxGain till
brightness is OK. Then if vid is too green/red, reduce Green/Red Color
temperature till color is OK. Click OK. Skip this step if vid color is
OK.
4.If you want to add a logo, you can use a 24bit bitmap file (to be
safe, load image file in Paint and save as a 24 bit bitmap). Built-in
logo filter is less flexible than the third party plugin.Leave it to you
to add the logo.
5.Next, In Virtualdub MPEG2-Load your file , then-File-Start
Frame-server-in the dialog box you get-click start. In the file save as
box you get, name it xxx.vdr and click OK.
6.Next Open Virtualdub Mod and open the vdr file with avicleaner
template to create an avs file-must if you are using Win98(ME?) and
Avisynth 2.5.5-even if you opt not to use either filter!!. If color of
original is OK and you do not want to put logo-open the mpg or
vob directly in Vdub Mod using mpgvobcleaner template if
you have XP(2000?) to generate avs file.
7.You can load the avs file in Virtualdub MPEG2(second window) and then
follow the tutorial as in
Tutorial on conversion to avi
or
Tutorial on Conversion to rmvb