No YV12 decompressor?

[jnojr]

Sorry if this isn't the correct forum for this question... i tried to guess as best I could.

It's been suggested that I use DGMPGDec instead of DVD2AVI to creat .d2v projects. However, after using DGIndex, I try to open the resultant .avs script in VirtualDubMod 1.5.4.1 via AviSynth 2.5.4 and get an error:

Avisynth open failure:
AVISource: couldn't locate a decompressor for fourcc YV12

Just trying to open with VirtualDubMod results in:

"Couldn't locate decompressor for format 'YV12' (unknown). VirtualDun requires a Video for Windows (VFW) compatible codec to decompress video. DirectShow codecs, such as those used by Windows Media Player, are not suitable. Only 'Direct stream copy' is available for this video."

Where do I find this decoder? Googling turns up a lot of posts in foreign languages and nothing helpful in English.

[erratic]

The Helix YUV Codecs can decompress YV12, but after reading your message and gastorgrab's reply again I realize that's not really your problem. Sorry to have bothered you.

[gastorgrab]

The AviSynth script for DGIndex can include a line to change the colorspace. Its in the DGMPGDec documentation.

--------cut-----------
loadplugin ("C:\Ut\Video\DGMPGDec\DGDecode.dll")
mpeg2source ("",cpu=6)
YV12toRGB24 ()
FlipVertical ()
--------cut-----------

This is the "template.avs" file i use. ( "Flip Vertical ()" must accompany YV12toRGB24 () )

....but if you have XviD or DivX on your machine you could use one of them to decode YV12.

just add a new entry to your registry:

--------cut-----------
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32]
"vidc.yv12"="xvid.dll"
--------cut-----------

[Suntan]

Not sure as I haven't switched to DGMPGDec yet, but don't you need a newer version of AVIsynth to use DGMPGDec? Higher than 2.55 I believe.

-Suntan