The next two tests will look exactly the same
as the YUY2 test except they will test decoding in YV12 and then RGB32
colourspaces. They should appear just like this YUY2 image except they
will say "YV12 Test" and "RGB32 Test" respectively. If any of the
outputs don't look the way they should then read the troubleshooting
If, however, everything is working fine you can move on to learning
about some of these programs.
Troubleshooting the Tests
The way the installer is written should mean that there should be no
problem whatsoever in the tests, but it is possible that problems could
occur. Read through the descriptions and see if there is anything that
solves your particular problem. If not, please report the error in the
Video Software Forum (a screenshot may be useful if it's a visible
problem) and hopefully someone will be able to help you.
1) A different version of Avisynth is being reported than the
one I tried to install!
This should be particularly noticeable if
the Version test reports 1.x or 2.0x version of Avisynth. You should
look in both your Windows (or WINNT) "System" and "System 32" folders
for avisynth.dll and delete them - you may even want to search your C
directory for this file too. After you have cleaned this up, go to the
AMVapp/Installed Files folder and re-run the Avisynth installer. Try
the test again and see if the version has changed.
2) I get an Avisynth error saying "There is no such command:
This means that there has been a problem during the
avisynth filters installation. Go to the AMVapp/Installed Files
directory and try installing the Avisynth filters again. Look in the
installation folder to see if the filters are actually installing. The
one you want installed is "mpeg2dec3dg.dll"
3) The display looks like garbage in some of the tests.
happen in all sorts of varieties and will depend greatly on a) What
video codecs are installed or registered and b) The drivers and overlay
capability of your graphics card. Particularly if you installed the
AMVapp and did not install FFDShow, it is unlikely that you will get an
accurate YV12 display (you may get two images and a load of garbage at
the bottom). The first advice I'd give to these playback problems is to
install FFDShow as contained in the AMVapp and in the Start Menu select
FFDShow/Configuration. In the left-hand frame, choose Codecs (at the
very top) and then in the right frame scroll down to the bottom:
installer enables YV12 decoding using the Helix YUV codecs but only if
you installed them. If not, you can try enabling FFDShow to handle the
You can select a variety of options for
FFDShow to decode - all supported will try all types of Raw video, "all
YUV" might fix YUY2 and YV12 problems and "all RGB" might fix all RGB
display issues - or you can choose the colourspaces individually.
There is a further possible problem that can occur that FFDShow can
compensate for and this is related to your graphics card's display
abilities. On the left hand menu you scroll to the bottom you can
choose the "Output" menu. In this there will be a list of output modes
and at the bottom there will be an option called "Use Overlay Mixer".
Try selecting or deselecting that as required to see if it fixes your
If you still have display issues, take a screencap from Windows Media
Player by selecting the player window, pressing Alt + PrtScn and then
pasting in an image editing tool to save to show people on the Video
Help Forums. Hopefully someone there will be able to help you out.
Also, right-click the media player window, choose "Properties" and then
click the "Advanced" tab to see what the video renderer is - that will
be useful information. If it just says "Video Renderer" then it means
it is probably using a Video For Windows decoder to display the file
which could mean you have a codec being used that can't handle the
streams correctly or possibly your graphics card is to blame.
4) I get an "Unrecognized Exception" error.
Oh dear - I
thought we'd seen the last of these. This error appears when either the
avisynth or DEDecode.dll finds a problem with processing the source
but it's a problem that hasn't had an error code written for it. This
can mean anything and if it is happening on the AppTests then it's not
good. Make sure the Version test is correct and the Avisynth Filters
have been installed correctly. Also double-check to see if your
Avisynth 'Plugins' directory - there should be a file called
DGDecode.dll and NO files called mpeg2dec.dll or mpeg2dec3.dll etc. In
the 'Plugins' directory
there may be versions of these files but that is fine - subdir files
should not affect the plugin autoloading.
5) I get a "Cannot playback file - format is not supported"
This means that Avisynth has not been installed or has been
installed incorrectly. Try installing again, see if the avisynth
installer gives you any errors. You will probably administrator access
to install avisynth, so check that you do.