lossless YV12 codecs (was: YV12 FAQ)

[Livesms]

I'm trying to find fast/efficient YV12 lossless codec.
I havea already tested AlparySoft Lossless Codec v 2.0 b9570.40607
Now I found here Lagarith lossless codec (supporting RGBs, YUY2 and YV12). Latest version v1.3.14
With my test sample 93 frames 512*384 i'got
ASLC 11153408
Lagarith 8089600

But after final encode and comparing encoded material (using ASLC and Lagarith) I found, that Lagarith do not give lossless encode with YV12
Here is MSU comparing graph

[foxyshadis]

Your comparison is broken. I assume you're using cartoons where every other frame is duplicated? You'll see that kind of pattern anytime you compare videos that are one frame off, for whatever reason. It's also possible but less likely that there's a colorspace conversion in there somewhere.

It is quite certainly lossless, though.

[IanB]

To visually compare near identical files

A=AviSource("File_A.avi")
B=AviSource("File_B.avi")
Subtract(A, B)
N=8 # Adjust sensitivity here
Levels(128-N, 1.0, 128+N, 0, 255)
StackHorizontal(A, Last, B)

[Livesms]

Originally Posted by foxyshadis

Your comparison is broken. I assume you're using cartoons where every other frame is duplicated?

No, just TV capture with MVDegrain2

Originally Posted by foxyshadis

It's also possible but less likely that there's a colorspace conversion in there somewhere.

I think it is, but where this colorspace conversion occures?

Originally Posted by foxyshadis

It is quite certainly lossless, though.

I've tests with
Alparysoft lossless codec
Loco
VBLE
All with real lossless results.
Only Lagarith gives some strange results for me.