AviSynth+ thread Vol.2

[DTL]

As users tried to use output of ColorBars() for resamplers testing ( https://forum.doom9.org/showthread.p...58#post1947958 ) it is recommended to add 'mode' parameter to ColorBars() internal function with at least 3 values:
1. 'pixel-art' (as today ColorBar() ouput)
2. 'film-look' ( I think it is default for real prof color bar generator)
3. 'video-look'

Possible processing is suggested in https://forum.doom9.org/showthread.p...74#post1947974 .

And may be at least put a note to Avisynth wiki about non-compatibility of current ColorBar() output for testing of 'film/video' motion pictures data processing software for quality and results of levels transition processing.

Linked wiki .pdf https://www.arib.or.jp/english/html/...B28v1_0-E1.pdf also notes about correct levels transitions preparation:

Annex A5: A.5 Transient
Ringing may occur when the stripe level of this color bar is suddenly changed, then this may possibly
cause operational inconvenience. Therefore, it is necessary to carry out design while limiting
bandwidths for leading edge and falling edge.
The number of samples to be used for the transient shall be 6 to 9, in the case of 1920
horizontal samples, although it may depend upon the scale of hardware, process performance
and the so-called “make up”.

Also the older ITU recs describes some valid forms of levels transition in details:
https://www.itu.int/dms_pubrec/itu-r...0-W!!PDF-E.pdf
Rec. ITU-R BT.801-1 (for SDTV)
Test signals for digitally encoded colour television signals conforming
with Recommendations ITU-R BT.601
and ITU-R BT.656
These digital waveforms are made up of pulses in uniform ranges, ramps between two uniform
ranges, and transitions between two uniform ranges, shaped by a filter whose impulse response R(t)
is defined as a function of time t as follows:
– for –3T < t < 3T, R(t) = 0.42 + 0.50 cos(π t/ 3T) + 0.08 cos(2π t/ 3T)
– otherwise R(t) = 0
(R(t): Blackman window).
The value of T is 74 ns for digital waveforms A1, A2, A3 and A4

And Rec. ITU-R BT.1729 https://www.itu.int/dms_pubrec/itu-r...4-I!!PDF-E.pdf (for HDTV)
Rise and fall times of bar transitions
The 10% to 90% rise time and 90% to 10% fall time of the colour bars should be identical to each
other and should be consistent with the frequency response specifications in Recommendations
ITU-R BT.601, ITU-R BT.1358, ITU-R BT.1847, ITU-R BT.1543 or ITU-R BT.709, as
appropriate to the format2. The shape of the leading and trailing edges should be similar to a raised
cosine function.

[Dogway]

Just wanted to report that for some time I have been having issues with variables that start with the same letter:

        mode == "edgeW"  ? "                                              y[0,0] I@ y[0,1]  B@ - abs I y[0,-1] G@ - abs max BB^ "                                    \
                          +"I y[1,1] C@ - abs I y[-1,-1] F@ - abs max CC^        I  y[-1,0] D@ - abs I y[1,0]  E@ - abs max DD^ "                                    \
                          +"I y[-1,1] A@ - abs I y[1,-1] H@ - abs max BB min CC min DD min "                                                                         \
                          +"DI@ DD == x D E dup1 dup1 min I min swap2 max I max clip DI BB == x B G dup1 dup1 min I min swap2 max I max clip "                       \
                          +"DI  CC == x C F dup1 dup1 min I min swap2 max I max clip          x A H dup1 dup1 min I min swap2 max I max clip ? ? ?"                : \

If I change the DI variable to S, everything is fine again.

[wonkey_monkey]

Another little note, not on Expr per se but on Format and String, which are useful in preparing Expr expressions. They only expand floats to six decimal digits after the point, which could cause some unnecessary inaccuracy. I think you need around 9 or 10 significant digits to guarantee hitting the true closest floating point number. Could consideration be given to a higher-precision flag or variations of those functions?

Or even allow %a format: https://stackoverflow.com/questions/...-in-c/10128764

[cretindesalpes]

I’m just installing AVS+ for the first time and suddenly I feel like a total newbie… So I have a question I cannot find the answer on the official website nor on the wiki:

What are the host applications compatible with 64-bit AVS+ ? For:
– Editing and previewing
– Piping
– Encoding

Also, maybe the installer should be a bit more clear that you can also keep intact your existing 32-bit AviSynth 2.5 just by unchecking the 32-bit dll. I needed to keep my 32-bit AVS 2.6 because I found incompatibilities with my existing plug-in set and the 32-bit AVS+.

[Sharc]

Originally Posted by cretindesalpes

Also, maybe the installer should be a bit more clear that you can also keep intact your existing 32-bit AviSynth 2.5 just by unchecking the 32-bit dll. I needed to keep my 32-bit AVS 2.6 because I found incompatibilities with my existing plug-in set and the 32-bit AVS+.

You may find Groucho's Universal Avisynth Installer useful for easy switching between versions:
https://forum.doom9.org/showthread.php?t=172124

[Boulder]

Originally Posted by cretindesalpes

What are the host applications compatible with 64-bit AVS+ ? For:
– Editing and previewing
– Piping
– Encoding

Editing and previewing : VirtualDub2 (https://sourceforge.net/p/vdfiltermod/wiki/Home/)
Piping : Avs2yuv64 (https://github.com/MasterNobody/avs2yuv/releases)
Encoding : f.ex. x264, x265 64-bit builds

[real.finder]

Originally Posted by Boulder

Editing and previewing : VirtualDub2 (https://sourceforge.net/p/vdfiltermod/wiki/Home/)

and/or AvsPmod https://forum.doom9.org/showthread.php?t=175823

Originally Posted by cretindesalpes

maybe the installer should be a bit more clear that you can also keep intact your existing 32-bit AviSynth 2.5 just by unchecking the 32-bit dll. I needed to keep my 32-bit AVS 2.6 because I found incompatibilities with my existing plug-in set and the 32-bit AVS+.

the installer can keep the old 32 avs if you uncheck the avs+ 32, I always did this, my 32 avs always avs 2.6 MT by SEt, but I often use 64 so it's last avs+

[kedautinh12]

Megui
https://sourceforge.net/projects/megui/

[LigH]

StaxRip (github / VideoHelp)

[Dogway]

Use avpsmod by gispos. Works fine with latest AVS+ 3.7.1.
For encoding I use avs2pipemod64 as always and x264_r2935_x64(Ligh).
To debug I find avsmeter and AVSInfoTool great tools too. I also had issues on the past and this tells you what is set on the register.

[cretindesalpes]

Thank you all very much for your replies!

[FranceBB]

Wow! @Cretindesalpes, you're back!
It's nice to see the creator of Dither Tools getting Avisynth+ for the very first time.
You won't ever feel the need to go back to the normal Avisynth, I can tell you that, you'll love AVS+

[kedautinh12]

Originally Posted by FranceBB

Wow! @Cretindesalpes, you're back!
It's nice to see the creator of Dither Tools getting Avisynth+ for the very first time.
You won't ever feel the need to go back to the normal Avisynth, I can tell you that, you'll love AVS+

And he will port fmtconv to avs
https://forum.doom9.org/showthread.p...78#post1948178

[FranceBB]

Originally Posted by kedautinh12

And he will port fmtconv to avs
https://forum.doom9.org/showthread.p...78#post1948178

Nice!

[qyot27]

Originally Posted by cretindesalpes

I’m just installing AVS+ for the first time and suddenly I feel like a total neebie… So I have a question I cannot find the answer on the official website nor on the wiki:

What are the host applications compatible with 64-bit AVS+ ? For:
– Editing and previewing
– Piping
– Encoding

Also, maybe the installer should be a bit more clear that you can also keep intact your existing 32-bit AviSynth 2.5 just by unchecking the 32-bit dll. I needed to keep my 32-bit AVS 2.6 because I found incompatibilities with my existing plug-in set and the 32-bit AVS+.

FFmpeg and mpv as well, so long as FFmpeg was configured with --enable-avisynth (which itself checks for the presence of AviSynth+'s headers in the system includes).

On all the other OSes* and CPU arches** AviSynth+ can now be used on natively, FFmpeg (and thus anything built against it, like mpv or VLC or kdenlive) and DJATOM's fork of avs2yuv are the direct points of contact.

*Linux, macOS, and BSD (since 3.5.0), Haiku (3.7.0)
**ARM (3.6.0), PowerPC (3.7.0), RISC-V and SPARC (git)

[StainlessS]

– Editing and previewing

Gispos did lots of work on AvsPMod:- https://forum.doom9.org/showthread.php?t=175823
And the old dead VirtualDub is reborn, VirtualDub2:- https://forum.doom9.org/showthread.php?t=172021
[VD2 not seem an update since about beginnning of pandemic, but its great and has AVS script editor, similar to old VDubMod].

[GAP]

Can you have AVISynth and AVISynth + on the same computer? It seems like you can only have one or other but some programs such as AVSMod can only use AVISynth vanilla.

[real.finder]

Originally Posted by GAP

Can you have AVISynth and AVISynth + on the same computer? It seems like you can only have one or other but some programs such as AVSMod can only use AVISynth vanilla.

you mean avspmod? it work with avs+, seems you use outdated one

anyway, you can have AVISynth and AVISynth+ on the same computer by temporarily switch the dll of AVISynth or AVISynth+ with MPP, avspmod can do it too, and some programs/tools can use the AVISynth.dll that in same folder with it

[GAP]

So when I install AVISynth + and it asks me to override AVISynth files, I just select that option?

[LigH]

Yes, the core DLL(s) need to be in the system folder to be registered systemwide, and additional files get in their carefully planned locations. Switching is easy, using the Universal Avisynth Installer by Groucho2004. But when you intend to just be and stay up-to-date, just run the official installer once and agree.