Syntax Q - filter args as a variable

[DDogg]

Is it possible to use variables with internal quotes as a filter argument?

If this works:

LoadPlugin("Convolution3D.dll")
avisource("Clip 001.avi").ConvertToYV12().Convolution3d(preset="movieHQ")
Why would not this work? (it gives a "there is no function named "cvl")

LoadPlugin("Convolution3D.dll")
cvl="Convolution3d(preset=``movieHQ'')"
avisource("Tape 1 - Clip 001.avi").ConvertToYV12().cvl

[sh0dan]

Use Eval(string). From the docs:

You can use Eval for something like:

settings = "352, 288"
Eval( "BicubicResize(" + settings + ")" )

[DDogg]

Thanks for your reply. I tried many variations of that before wasting your time. Would you be kind enough to verify if TEX style quotes are broken in avisynth? I am becoming suspicious they may be. If not, I certainly cannot figure out how to use eval (it has never made sense to me). The following give a "unexpected character "'" :

s1="preset= "``moviehq''"
avisource("Tape 1 - Clip 001.avi").ConvertToYV12()
eval("Convolution3d(" + s1 +")")

[Guest]

Your s1= line does not have matching quotes. There are 3 " marks (odd number).

[DDogg]

Sharp eyed one, how is India? I think that was just a typo when I posted. Same error with this:

s1="preset= ``moviehq''"
avisource("Tape 1 - Clip 001.avi").ConvertToYV12()
eval("Convolution3d(" + s1 +")")

[Guest]

Now you've got me. Can't do any testing because this is not my PC. I'm sure the great sh0dan will come through for you. Try building up the eval string a step at a time and see if the results shed further light.

India is great, but the 90 deg F temp swing got me sick for a week. And it snowed 8 inches back home so every burglar in town knows my house is empty. Got a shovel? :(

[DDogg]

Ah HA! The tex style is broken or my use of the back quote (Non shifted tilde key) was incorrect. This subtitle line below showed the `` were not being replaced with ". (add: Maybe it would not show the replacement until the eval command?) I would be 100% sure of that if the script below would now work but it will not.

LoadPlugin("Convolution3D.dll")
s1="preset=''moviehq''"
avisource("Tape 1 - Clip 001.avi").ConvertToYV12()
Blackness.Subtitle(s1)
#eval("Convolution3d(" + s1 +")")

Further, this will work just fine, so I think this quote thing is a bug that has not been noticed before:

LoadPlugin("Convolution3D.dll")
cvl="Convolution3d(0, 3, 4, 3, 4, 2.8, 0)"
avisource("Tape 1 - Clip 001.avi").ConvertToYV12()
eval(cvl)

Where as this will not work:

LoadPlugin("Convolution3D.dll")
cvl="Convolution3d(preset=''movieHQ'')" # or ``movieHQ''
avisource("Tape 1 - Clip 001.avi").ConvertToYV12()
eval(cvl)

[DDogg]

@sh0dan, I know these type of things are not your favorite, but I wonder if you could aknowledge whether you think this may be a bug in the core code. If it is a problem, then NIC does not need to waste his time (if/when he has the time to even look at it)on changing the quote handling mechanism in the CALL command. If it is not a problem, then just call me a dummy and give me a few more of your cryptic one line hints :p

[sh0dan]

@DDogg: I see the problem. I think the issue is, that the " is being reinterpreted so that the finished line looks like this:

Eval("Convolution3d(preset="movieHQ")") #when it should look like this:

Eval("Convolution3d(preset=''movieHQ'')")

I can't give you any workaround, and I don't have the faintest clue on how to solve it. :(

[DDogg]

Bummer. I guess that means it is a bug duly reported. I wonder if whoever added all the string functions in 2.07 would add the old chr$() That was always a last resort - oldanddead$="+chr$(34)+back in the old days+chr$(34)+". (or something like that, hehheh)

Edit: Sneaking back to change the 13 to a 34 :o

[WarpEnterprises]

Attached maybe the smallest possible AviSynth plugin creating just a global (i.e. being known in functions too) variable chr34 which is set to "


loadplugin("c:\myprojects\chr\release\chr.dll")
version()
subtitle(chr34)


[edit: attachement deleted]

[DDogg]

WarpEnterprises, hey, thanks! I'll give it a shot when the attachment is approved. Eh, while you are at it, how 'bout a TIME, DATE and DAY variable? Yes, I am a shameless man :---)

Mentioned here:http://forum.doom9.org/showthread.php?s=&threadid=47377

[sh0dan]

Originally posted by WarpEnterprises
Attached maybe the smallest possible AviSynth plugin creating just a global (i.e. being known in functions too) variable chr34 which is set to.
Would it be too to ask, for you to extend this to all ASCII characters? Just for the sake of completion?

Someone might also find a 2.5 version great ;)

[bilu]

This works:


a="Convolution3d(preset=''movieHQ'')"
Eval("Subtitle(a)")


This doesn't:


a="Convolution3d(preset=''movieHQ'')"
Eval(a)


Nothing except chr can do it? :confused:


Bilu

[bilu]

@Ddogg

Well, this works :)

function c3(clip c,string p) {
pr=Convolution3d(c,preset=p)
return pr
}

c3("movieHQ")

Bilu

[DDogg]

x-post < never mind
@WarpEnterprises Not being picky at all, it is just that I am right in the middle of a 2.5 project I am working on. It has got a little complex so I don't want to change to 2.07. Any chance of a 2.5? AS sh0dan said, I think it would be very helpful, especially with a full chr set.

[bilu]

Originally posted by DDogg
x-post


I was referring to a workaround on the initial problem :o


Bilu

[DDogg]

Sorry, I had posted a query to you before you brought up the work around. I was going to go back and edit when I had digested the function. I have a lot of trouble understanding them so it takes me a while :) I should have put "thinking" instead of x-post (meaning crossing post)

[bilu]

OK :)

a="movieHQ"
c3(a)

also works, is it what you were looking for? :)


Bilu

[DDogg]

Bilu, thanks for the workaround(s)

I was really just using the example of convolution because it used quotes in a sub-argument. Trying to put something like that within a variable is supposed to work (if my reading is correct) using the syntax a = "main(``stuff'')" . My understanding is eval(a) is supposed to replace the ``'' with "" so that avisynth sees the statement as: main("stuff"). This is really going to cause some grief for anybody trying to do complex variable manipulation. I hope it gets fixed, (I don't even know who is running that area). Workarounds will have to do until/if then.

[WarpEnterprises]

Look here:

CHR.DLL (http://www.avisynth.org/~warpenterprises/)

(has a CHR and a TIME function)

2.0 + 2.5

For the possible time formatting codes look into chr.cpp.

[DDogg]

WarpEnterprises, thanks so much! I look forward to giving this a try tomorrow and will report back the reults and some more examples.

[WarpEnterprises]

Forgot to emphasize: the time is of course the LOAD TIME of the script (it cannot be used to imprint e.g. the current time on a video from start to the end, this would have to be done by a completely different function)

[DDogg]

WarpEnterprises, those time functions in chr really work well and are very comprehensive and thought out. Thanks!
http://forum.doom9.org/showthread.php?s=&postid=276597#post276597
Note: I do understand it is the start time. I used it in the script as a place holder until I can figure out how to get the end time.