Capturing Lossless VHS Tape

[pandy]

What do you mean by "processing"? Most Avisynth and VirtualDub filters won't work with YUY2.

Most of modern filters works in YUY2 so i'm not sure which filters you are referring non YUY2 compliant - also there are some tricks to keep vertical chroma at maximum resolution. Anyway conversion YV12 to YUY2 is practically lossless and conversion from YUY2 to YV12 is always lossy as vertical number of samples is halved - also YV12 is sensitive to context (progressive/interlace) so processing path must be controlled from start to end carefully.
And always if there is some filter that work only in YV12 space it can be introduced later in chain.

Btw as YUY2 i'm referring to 4:2:2, not to particular sample organization (planar/interleaved).

[sanlyn]

By YUY2 I think you're rfeferr9ing to YUY2. Period.

Try running these plugins in YUY2. This is only a partial list. Other plugins and routines not shown will also include these as support files:

AAA
DAA
SangNom
SangNom2
SAA
FixChromaBleeding
GradFun2DBmod
Deblock_QED
SmoothD2
BlindDeHalo3
DeHalo_alpha
aWarpSharpDering
EdgeCleaner
HQDering
BlendBob
QTGMC (YUY2 only with mt_masktools-25.dll v2.0.45.0)
srestore
RemoveBlend
DeScratch
ChubbyRain2
Bifrost
CheckMate
DeCrawl
LUTDeCrawl
DCTFun
SmoothUV
TemporalDeGrain
Deen
DfftestMC
MCTemporalDenoise
RemoveDirtMC
RemoveSpotsMC
ColourLike
SmoothAdjust
Ylevels
FastLineDarken
FastLineDarkenMOD
mfToon
Toon
aWarpSharp
aWarpSharp2
LSFmod
FineSharp
MedianBlur
SeeSaw
MaskTools
MaskTools2

[pandy]

By YUY2 I think you're rfeferr9ing to YUY2. Period.

Try running these plugins in YUY2. This is only a partial list. Other plugins and routines not shown will also include these as support files:

.
.
.

Where i'm referring to YUY2 i'm referring to 4:2:2 not to internal byte/bits orientation due of some processing requirement (such as MMX or SSE) - period.

Most of those filters are outdated, some of them are really OK thus it is worth to play with tricks to use them in pseudo YUY2 space (i.e. YV12 but transparent from mathematical point of view) and YV12 limitations are obvious for video processing - display fully saturated red, sharp edge object over fully saturated blue background.

And most important for you - still capturing (analog source) in YUY2 you will not loose quality even after conversion to YV12 for further processing - this is why 4:2:2 is used in professional broadcast and 4:2:0 is consumer - low grade format.

[sanlyn]

I agree, capturing VHS to YUY2 is the way to go. None of those plugins is "dated", if by dated you mean non-operational. They're still in popular use. If they still work for a specific purpose, they're still useful.