View source for Script examples

Here are some examples of AviSynth scripts, grouped in categories of increasing complexity. First download and install AviSynth, then save these scripts with the file extension ".avs" and load them in your favorite video player or editor.

== Simple examples ==

=== Example 1: Cutting out sections ===
<code>
 # This is a comment.  All lines starting with a '#' symbol are comments
 # and are ignored by AviSynth.
 
 # load the file "somevideo.avi" from the same directory as the script
 [[AviSource|AVISource]]("somevideo.avi")
 
 # Trim specifies what frames to KEEP.  The following line keeps frames
 # [0, 12000], [20000, 32000], [44000, end] and then splices them
 # together, effectively removing frames [12001, 19999] and
 # [32001, 43999]
 #
 # NOTE: the interval notation [a, b] means all frames from a through b,
 #       inclusive.
 #
 [[Trim]](0, 12000) ++ Trim(20000, 32000) ++ Trim(44000, 0)
</code>

=== Example 2: Resizing ===
<code>
 AVISource("somevideo.avi")
 
 # resize the dimensions of the video frame to 320x240
 [[Resize|LanczosResize]](320, 240)
</code>

=== Example 3: Dubbing audio ===
<code>
 video = AVISource("somevideo.avi")
 
 # we can load WAV files too
 audio = [[AviSource|WAVSource]]("music.wav")
 
 # mux the video and audio tracks together
 [[AudioDub]](video, audio)
</code>

=== Example 4: Adjusting brightness, removing noise, fading ===
<code>
 AVISource("somevideo.avi")
 
 # TemporalSoften is one of many noise-reducing filters
 [[Soften|TemporalSoften]](4, 4, 8, scenechange=15, mode=2)
 
 # increase the gamma (relative brightness) of the video
 [[Levels]](0, 1.2, 255, 0, 255)
 
 # fade-in the first 15 frames from black
 [[Fade|FadeIn]](15)
 
 # fade-out the last 15 frames to black
 [[Fade|FadeOut]](15)
</code>

== More complex examples ==

=== Example 5: poptones' [[Layer]] example ===
<code>
 [[LoadPlugin]]("MPEG2DEC.dll") 
 clip1 = [[DGDecode/MPEG2Source|Mpeg2Source]]("combine.d2v").[[Crop]](16, 0, 688, 576).ConvertToRGB32
 noise = AviSource("noise.avs").[[ConvertToRGB32]]
 clip1 = clip1.[[Layer]](noise, "add", 8, 0, 0, use_chroma=true)
 
 clip2 = clip1.[[Trim]](125766, 0)
 clip = clip1.Layer(clip2, "add", 128, 0, 0, use_chroma=true).Trim(9180, \
     86780).[[AssumeFrameBased]].[[ComplementParity]].[[Bob]]
 
 # build de-logo mask
 logosrc = AviSource("nologo.avi").[[Weave]].ConvertToRGB32.[[Resize|BilinearResize]](59, 13)
 masklogo = AviSource("whitelogo.avi").ConvertToRGB32
 logo = logosrc.[[Layer|Mask]](masklogo).BilinearResize(60, 27)
 
 # now cover up that ugly white logo...
 clip = clip.Layer(logo, "add", 255, 582, 36, use_chroma=true)
 
 blur = clip.[[GeneralConvolution]](0,
                  "10 10 10 10 10 
                  10 10 10 10 10
                  10 10 16 10 10
                  10 10 10 10 10
                  10 10 10 10 10")
 # sobel edge detection... the power of the matrix!
 hor = clip.GeneralConvolution(0,
                  "-1  0  1
                   -2  0  2
                   -1  0  1")
 vert = clip.GeneralConvolution(0,
                  "-1  -2  -1
                   0  0  0
                   1  2  1")
 edgemask = hor.Layer(vert,"lighten",255,0,0,1)
 
 # now sharpen up just the edges of the blurred image...
 clip = clip.Mask(edgemask)
 clip = blur.Layer(clip, "add", 128, 0, 0)
 
 return clip
</code>


=== Example 6: Write  pictures with flash to images from full video ===
==== params.avs ====

<code>
 filename="somefile.avi"
 logfile="output.txt" 
 path="P:\ath\To\Files\" 
 lumathresh=80 
 imageprefix="prefix_" 
</code>

==== FindFlash.avs ====
<code>
 Import("Params.avs")
 AviSource(path+filename).ConvertToYV12 
 WriteFileIf(path+logfile, "(AverageLuma>lumathresh) && (YDifferenceToNext() > 0)", "current_frame","space", "current_frame")
</code>

==== SaveFlash.avs ====
<code>
 Import("Params.avs")
 AviSource(path+filename) 
 ScriptClip(""" ImageWriter(path+imageprefix,myvar, myvar, "bmp",false) """)
 ConditionalReader(path+logfile, "myvar", false) 
</code>

== See Also: ==

* See [[External plugins|shared functions]] (and external plugins) written and contributed by the AviSynth community

[[Category:AviSynth_Usage]]