Audio analyse

tin3tin · 30th June 2007, 13:12

I've added support for avisynth post effects to DVD slideshow GUI. And through avisynth support for Free Frame plugins.

Now I wonder is there a way to analyse the audio in avisynth-script in a way that the current frame can be manipulated through the values of the current volume/frequency ect.?

tin3tin · 1st July 2007, 09:50

[Double post - sorry - please delete this post]

tin3tin · 1st July 2007, 09:51

This is what I have come up with so far:

I guess that a combination of FrameEvaluate and a new Runtime Function could be the best way to value/volume ect. return values into ex. a Free Frame plugin. Unfortunately I don't know how to code this kind of stuff...

Alternatively another way could be to get sox to analyse a wav file and export to a .dat file. I have to figure out if it is possible to export a value pr. frame, matching the framerate and then use ConditionalReader to read the .dat file into a variable which can be used in ex. a the Free Frame plugin.

Any other idears or ways to get sound to manipulate images?

tin3tin · 2nd July 2007, 11:27

Hmm I just came across the audiograph plugin. If I just knew a bit about this c stuff... I guess it wouldn't be that hard to make it return a max value of the waveform of the current frame instead of a clip...

Can anyone help me with this?

Wilbert · 2nd July 2007, 17:14

Histogram(mode="audiolevels") returns the maximal value on a frame. So the math is already there. It doesn't look that hard to add this to conditional_functions.cpp, but i have no time for it coming two weeks.

Matrixbob · 7th July 2007, 14:54

Interesting link:
I need to realize 1 "cut audio"!

Wilbert · 10th July 2007, 14:13

Quote:

Hmm I just came across the audiograph plugin. If I just knew a bit about this c stuff... I guess it wouldn't be that hard to make it return a max value of the waveform of the current frame instead of a clip...

Can anyone help me with this?

If you are still interested, try this avisynth.dll:

Syntax:
AudioMax(channel) # maximal volume in channel (framewise)
AudioMin(channel) # minimal volume in channel (framewise)
AudioRMS(channel) # root mean square volume in channel (framewise)
# channel = 0 means that the max/min/rms is taken over all samples in all channels (framewise)

Usage:

Code:

v = BlankClip(pixel_type="YV12")
a = Tone(type="Triangle", frequency=2, level=0.4)
w = AudioDub(v,a) #.Histogram(mode="audiolevels")
w = ScriptClip(w, "Subtitle(String(AudioMax(1)))")
#w = ScriptClip(w, "Subtitle(String(AudioRMS(0)))")
#w = ScriptClip(w, "Subtitle(String(AudioMin(1)))")
w = w #.ConvertToRGB32.AudioGraph(20)
return w

Note that the values are given in decibels (see also histogram docs for an explanation).

tin3tin · 11th July 2007, 10:31

Thank you! It works very well with your scripted example, however when I import som music it gives me an "CAVIStreamSynth: System exception - Access violation at 0x0, reading from 0x0" error.

I'll have to check if this is the case with AudioGraph as well... it might be.

Wilbert · 11th July 2007, 10:46

Could you upload the audio somewhere that causes problems?

tin3tin · 11th July 2007, 12:20

It's properly not avisynth which is causing the problem. It's Media Player Classic(even the latest builds). It' doesn't matter if I throw audiograph, histogram or your new functions at it, then it gives me the access violation error mentioned above. And also with your tone instead of music there's the error.

But AvsP is showing the script without problems(with the slider). Quenc render without problems.

So in my eyes must this be Media Player Classic related and no problems with your new functions. Thanks alot!!!

I guess I'll have to find another player as external player for AvsP now...

tin3tin · 13th July 2007, 09:25

Will these functions be added to the next avisynth version? :-)

Btw. does anyone else get these errors in MPC(or is it something with my set-up(ffshow - whatever)))?

Wilbert · 13th July 2007, 22:10

Quote:

It's properly not avisynth which is causing the problem. It's Media Player Classic(even the latest builds). It' doesn't matter if I throw audiograph, histogram or your new functions at it, then it gives me the access violation error mentioned above.

I forgot to ask. Does this also happen with older versions of AviSynth, or only the latest official alpha?

tin3tin · 15th July 2007, 13:35

Yes it seems so. Histogram actually works, but normalize doesn't.

But I'm affraid it might be something in my set-up. Resently Directshowsource doesn't load mp3 anymore properly. FFshow doesn't fix it.

But is it only here these errors with MPC happen?

tin3tin · 15th July 2007, 18:06

Here's some crazy stuff I did with your new functions, DVD slideshow GUI, freeframe.dll and the freeframeplugin: Petebloom.dll.

Audio effects in FLV player

Still haven't found the reason why MPC crashes, when using those sound functions...

Wilbert · 23rd August 2007, 20:45

@tin3tin,

I created a plugin out of it:

http://www.geocities.com/wilbertdijk...xAudio_v01.zip

The reason that it will not be included in the core (for now) is stability, but IanB is able to explain that better.

tin3tin · 4th September 2007, 17:26

Great I'll give it a try.

Hmmm. I can't load it with LoadPlugin...

Wilbert · 4th September 2007, 21:37

Quote:

Great I'll give it a try.

Hmmm. I can't load it with LoadPlugin...

I forgot to export it as a dll

I will post a new version tomorrow.

Wilbert · 9th September 2007, 12:53

New version: http://www.wilbertdijkhof.com/MinMaxAudio_v02.zip

Gavino · 18th October 2008, 22:26

A slight confusion in the documentation of MinMaxAudio

Quote:

Computes the root mean square, maximal or minimal value over all samples in all channels, or just over all samples in channel, and outputs the value (in decibels) as a string.

Actually the functions return a float.

tin3tin · 13th March 2009, 09:18

Wilbert, your site links to version 01(not working) and not the 02 from above(working).

30th June 2007, 13:12	#1 \| Link
tin3tin Registered User Join Date: Mar 2005 Posts: 366	Audio analyse I've added support for avisynth post effects to DVD slideshow GUI. And through avisynth support for Free Frame plugins. Now I wonder is there a way to analyse the audio in avisynth-script in a way that the current frame can be manipulated through the values of the current volume/frequency ect.? __________________ DVD slideshow GUI(Freeware).

1st July 2007, 09:50	#2 \| Link
tin3tin Registered User Join Date: Mar 2005 Posts: 366	[Double post - sorry - please delete this post] __________________ DVD slideshow GUI(Freeware). Last edited by tin3tin; 1st July 2007 at 10:01.

1st July 2007, 09:51	#3 \| Link
tin3tin Registered User Join Date: Mar 2005 Posts: 366	This is what I have come up with so far: I guess that a combination of FrameEvaluate and a new Runtime Function could be the best way to value/volume ect. return values into ex. a Free Frame plugin. Unfortunately I don't know how to code this kind of stuff... Alternatively another way could be to get sox to analyse a wav file and export to a .dat file. I have to figure out if it is possible to export a value pr. frame, matching the framerate and then use ConditionalReader to read the .dat file into a variable which can be used in ex. a the Free Frame plugin. Any other idears or ways to get sound to manipulate images? __________________ DVD slideshow GUI(Freeware). Last edited by tin3tin; 1st July 2007 at 09:53.

2nd July 2007, 11:27	#4 \| Link
tin3tin Registered User Join Date: Mar 2005 Posts: 366	Hmm I just came across the audiograph plugin. If I just knew a bit about this c stuff... I guess it wouldn't be that hard to make it return a max value of the waveform of the current frame instead of a clip... Can anyone help me with this? __________________ DVD slideshow GUI(Freeware).

7th July 2007, 14:54	#6 \| Link
Matrixbob Registered User Join Date: Apr 2007 Location: Italy Posts: 35	Interesting link: I need to realize 1 "cut audio"! __________________ Aiuta la ricerca col tuo PC: >>Calcolo distribuito BOINC.Italy: unisciti anche tu<< Più largo è il sorriso, più affilato è il coltello.

2nd July 2007, 17:14	#5 \| Link
Wilbert Moderator Join Date: Nov 2001 Location: Netherlands Posts: 6,356	Histogram(mode="audiolevels") returns the maximal value on a frame. So the math is already there. It doesn't look that hard to add this to conditional_functions.cpp, but i have no time for it coming two weeks.

11th July 2007, 10:31	#8 \| Link
tin3tin Registered User Join Date: Mar 2005 Posts: 366	Thank you! It works very well with your scripted example, however when I import som music it gives me an "CAVIStreamSynth: System exception - Access violation at 0x0, reading from 0x0" error. I'll have to check if this is the case with AudioGraph as well... it might be. __________________ DVD slideshow GUI(Freeware). Last edited by tin3tin; 11th July 2007 at 11:48.

11th July 2007, 10:46	#9 \| Link
Wilbert Moderator Join Date: Nov 2001 Location: Netherlands Posts: 6,356	Could you upload the audio somewhere that causes problems?

11th July 2007, 12:20	#10 \| Link
tin3tin Registered User Join Date: Mar 2005 Posts: 366	It's properly not avisynth which is causing the problem. It's Media Player Classic(even the latest builds). It' doesn't matter if I throw audiograph, histogram or your new functions at it, then it gives me the access violation error mentioned above. And also with your tone instead of music there's the error. But AvsP is showing the script without problems(with the slider). Quenc render without problems. So in my eyes must this be Media Player Classic related and no problems with your new functions. Thanks alot!!! I guess I'll have to find another player as external player for AvsP now... __________________ DVD slideshow GUI(Freeware).

13th July 2007, 09:25	#11 \| Link
tin3tin Registered User Join Date: Mar 2005 Posts: 366	Will these functions be added to the next avisynth version? :-) Btw. does anyone else get these errors in MPC(or is it something with my set-up(ffshow - whatever)))? __________________ DVD slideshow GUI(Freeware).

15th July 2007, 13:35	#13 \| Link
tin3tin Registered User Join Date: Mar 2005 Posts: 366	Yes it seems so. Histogram actually works, but normalize doesn't. But I'm affraid it might be something in my set-up. Resently Directshowsource doesn't load mp3 anymore properly. FFshow doesn't fix it. But is it only here these errors with MPC happen? __________________ DVD slideshow GUI(Freeware).

15th July 2007, 18:06	#14 \| Link
tin3tin Registered User Join Date: Mar 2005 Posts: 366	Here's some crazy stuff I did with your new functions, DVD slideshow GUI, freeframe.dll and the freeframeplugin: Petebloom.dll. Audio effects in FLV player Still haven't found the reason why MPC crashes, when using those sound functions... __________________ DVD slideshow GUI(Freeware).

23rd August 2007, 20:45	#15 \| Link
Wilbert Moderator Join Date: Nov 2001 Location: Netherlands Posts: 6,356	@tin3tin, I created a plugin out of it: http://www.geocities.com/wilbertdijk...xAudio_v01.zip The reason that it will not be included in the core (for now) is stability, but IanB is able to explain that better.

4th September 2007, 17:26	#16 \| Link
tin3tin Registered User Join Date: Mar 2005 Posts: 366	Great I'll give it a try. Hmmm. I can't load it with LoadPlugin... __________________ DVD slideshow GUI(Freeware). Last edited by tin3tin; 4th September 2007 at 17:31.

9th September 2007, 12:53	#18 \| Link
Wilbert Moderator Join Date: Nov 2001 Location: Netherlands Posts: 6,356	New version: http://www.wilbertdijkhof.com/MinMaxAudio_v02.zip Last edited by Wilbert; 8th September 2015 at 15:02. Reason: corrected url

13th March 2009, 09:18	#20 \| Link
tin3tin Registered User Join Date: Mar 2005 Posts: 366	Wilbert, your site links to version 01(not working) and not the 02 from above(working). __________________ DVD slideshow GUI(Freeware).

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