I simply want to open an AVI file with AviSynth and feed it into VirtualDub. However, when I open my .avs script (consisting of just one AviSource() call), I get the following error:

Avisynth open failure:
AVISource: Couldn't locate a decompressor for fourcc dvds
(H:\Videos\QTGMC\test.avs, line 1)

The required dvsd codec seems to be installed, according to software called GSpot (which identifies a video file's required codec's). Does anyone know why I can't open this file and how to fix it?

  • The error message would indicate your codec doesn't have the correct functionality. Maybe it is faulty. You could try reinstalling.
    – Dr Mayhem
    Aug 21, 2018 at 17:28
  • @DrMayhem I must have come pre-installed, since I never installed it. And I can't find it anywhere.
    – user22994
    Aug 22, 2018 at 1:03

1 Answer 1


In case anyone has the same issue in the future, I solved it by installing Cedocida codec: http://www.cithraidt.de/cedocida/index.html#download.

Using DirectShowSource() instead of AviSource() also works.

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