Support forum for DG Tools

Hi,
Maybe I am missing something, but PVBob (standalone) seems to require that the picture height must be mod8, otherwise the bobbed picture gets messed up.
I didn't find the mod8 requirement in the documentation of DGDecodeNV, so maybe it is a driver issue on my side only.
Any thoughts? Thanks.

Windows 10
GeForce GTX 1050Ti
Driver Version: 26.21.14.3630 (GeForce 436.30)

Close to zero chance of a driver issue or of you missing something. I'll check it after I get DGDemux squared away for THD. Thank you for your report, Sharc.

My initial attempt to duplicate this didn't show any problems. Can you please provide a sample file, your script, and a screenshot of the problem? Thanks!

Does it fail the same way with bundled DGBob() also?

Sample and screenshot:
https://www.mediafire.com/file/6or2nege ... 2.zip/file

Script: The problem depends on the horizontal and vertical cropping values

Thank you, Sharc! That is super weird. Investigating...

Probably a width versus pitch bug, given there is a crop in the picture (get it?). Who would code like that?

Daddy taught me all about puns. Bullwinkle is really good at word mirroring. For example, "me meanie", "take over while he takes cover". He's brilliant. And I am not just saying that because I want to be Moose Approved.

When you learn C/C++ you'll figure it out.

Thanks Natasha. I don't believe a word they say about you.

Mr Peabody is teaching me binary right now.

The thing about puns is you should never say "get it?". You got it?

Got it, Bullwinkle! Cuz if you have to say "get it?" the pun wasn't good enough. Stupid people won't get it, right?

If you chose one out of 8 dresses how many yes/no questions would I need to ask to know which one you are wearing?

Nice try. I don't wear dresses, Sherman. Still wanna be Moose Approved?

Oh, right, sorry Bullwinkle.

In case you didn't know, the answer is 3. That's log base 2 of 8!

Do I get credit for a workaround? The user could crop after PVBob().

Partial credit. We don't want people to have to work around our bugs. Go for perfection!

Mr Peabody said we're gonna go back in time and meet George Boole. Not only did he invent Boolean numbering and logic but he also anticipated some of the Bell inequalities, at least the simple 3-term ones, the ones without auxiliary hypotheses. They're tautologies, really. Later inequalities involve locality assumptions, etc. Like CH and CHSH.

Stick to Sharc's problem until you solve it. Don't get sidetracked.

Sherman wrote: ↑

Sun Apr 26, 2020 5:04 pm

Oh, right, sorry Bullwinkle.

In case you didn't know, the answer is 3. That's log base 2 of 8!

Do I get credit for a workaround? The user could crop after PVBob().

The user could also add black borders back after cropping. Do I get credit for this workaround?

Full credit Sharc, you've been Moose Approved for donkeys' years.

Sherman's gonna fix it for sure.

It's not just about alliteration. Look for the deeper structure. Singing from the heart, as our dear friend Levi might say. Rest in peace all dear departed.

https://youtu.be/mxhIK7rUeqI?t=190

Divine energy will flow through you, if you allow it.

Making good progress. I understand for loops now but pointers are blowing my mind.

Don't give up! You're almost there.

I don't see any obvious coding errors. It's really interesting.

Crop only the sides:

crop(0,4,-0,-8) # NO PROBLEM
PVBob()

Crop only the top/bottom:

crop(16,0,-24,-0) # NO PROBLEM
PVBob()

Crop all around:

crop(16,4,-24,-8) # FAILS
PVBob()

Here's the kicker. We can try to eliminate width/pitch issues by sourcing with BlankClip():

blankclip(240,640,576,pixel_type="YV12",color=$0000ff) # NO PROBLEM
PVBob()

blankclip(240,680,576,pixel_type="YV12",color=$0000ff) # FAILS
PVBob()

Everything is mod8 for both of them.

Still investigating...

Guys, I might have found something!

The code that uploads the U and V planes to the VPP on the GPU assumes that the UV pitch is half the Y pitch. Well, in tracing I find that is not true for the failing cases. Gonna try fixing it...

Does the VPP even allow for UV pitch != Y pitch / 2 ? We'll see.

BTW, I'm a bit confused about modulo. What is 256 mod 0?

If the VPP is limited as you suggest, you'll have to re-pack things on the way up.

If you write:

int x = 256, y;
y = x % 0;

Your computer will explode. Don't do it!

Sherman wrote: ↑

Fri May 01, 2020 9:43 am

BTW, I'm a bit confused about modulo. What is 256 mod 0?

It is not what they call a singularity in quantum mechanical...?

You could be right, jpsdr. I haven't learned quantum mechanics yet, maybe next week.

I'm shopping for a new PC...Curly was right.