how to lower other audio track volume depends on video track - script?

marcinzm wrote on 7/30/2018, 9:02 AM

Hello,

I would like to create the script which let me lower audio track volume depends on video track.

Let me explain it to you in details.

For example...

I have one audio track with 5 songs (let me call it "a").

I have also one video track with many video cut videoclips with their original audio tracks (let me call it "b"). Some parts of the video clips contain original sound ("b") (volume on). Some other parts of the video clips have muted their audio tracks ("b").

I would like to create a Vegas Pro 15 script which

- lower volume of songs ("a") to (10% level volume) but only when corresponded audio track ("b") of its video clip is not muted. When corresponded audio track ("b") of the video clips is muted, then audio track of songs ("a") should have maximum volume.

In these cases script should also cut the songs in these parts where volume of the cut video clips are being changed.

Is it possible to do it in Vegas Pro 15 Suite?
Can you provide me some sample example for cutting video cipds depending on the conditions of volume of corresponded video clips of video track?

I hope you know what I mean.

I really apprieciate your help.

Regards
Marcin

Comments

john_dennis wrote on 7/30/2018, 2:11 PM

I suspect you might be trying to avoid the tedium of repetitive actions, but do you use volume envelopes?

marcinzm wrote on 7/30/2018, 2:42 PM

Yes, I want to add some automatic processing on every project I create. It is tedium of repetitive action. I have never used volume envelopes. Can I achieve the goal I want with volume envelopes? Can you show me some video example or something like that?

Former user wrote on 7/30/2018, 2:44 PM

It's commonly called auto ducking. I asked a similar question & was linked to this plugin

http://www.db-audioware.com/sidechain-compressor

It does do what you want it to do, but others may have more options for you

marcinzm wrote on 7/30/2018, 2:57 PM

Thank your help. I am a programmist so I would like to write script which let me do so.

marcinzm wrote on 7/30/2018, 2:57 PM

Do you know some script Vegas Pro 15 tutorial / manual which current available functions etc.

Former user wrote on 7/30/2018, 3:12 PM

Here is a quick video I did on using Volume envelopes. It is not automatic, but might give you some ideas.

john_dennis wrote on 7/30/2018, 3:34 PM

Here's another...

Former user wrote on 7/30/2018, 8:32 PM

@marcinzm

Vegasaur's Voice Over function does what you want.

https://vegasaur.com/Vegasaur

@altarvic

marcinzm wrote on 7/31/2018, 2:12 AM

Thank you @Former user. It would be a good choice, but it can do it only for one audio track and it is not free.
I thought I would like to create such plugin by my own.
I a am developer. It would be a good start for me with programming such plugins.
That`s why I have small request to you all.

Can you write me some links to tutorial how to create plugins in Visual Studio for Vegas Pro 15?

I would like to read some tutorial/manual for a good start. I know Visual Studio 2015 and 2017, I have been creating many desktop application but only stand-alone Windows applications.

Please help me.
Thank you in advance
Marcin

marcinzm wrote on 7/31/2018, 6:03 AM

1) I have read something about OpenFX plugins, but if I am right, it is only possible to write such OFX plugin only in C++. Unfortunately I know C#.

2) I found out that auto audio ducking is available in Audacity software for free. It is much better than any other non Vegas Pro solutions, because it can handle also multiple tracks (I hope). I will use this software in this case. It will enhance my efficienty. I am very happy that you call it "auto ducking", because it was easy for me to search it.

Red Prince wrote on 7/31/2018, 9:29 AM

1) I have read something about OpenFX plugins, but if I am right, it is only possible to write such OFX plugin only in C++.

You are not right. 😎 For example, my Koliba plugins (there is a thread about them somewhere on this forum) are written mostly in assembly language with a C shell (yes, C, not C++, I profoundly hate C++).

marcinzm wrote on 7/31/2018, 11:19 AM

Red Prince thank You for your answer, but What about C#. Is it possibile to write a openfx plugin in C#? Is there any documentation for it?

Red Prince wrote on 7/31/2018, 1:35 PM

I have never used C#, so I cannot tell. That said, the official OFX specs are written using the C syntax, which is traditionally the generic syntax that is supposed to be easy to port to any modern language. Judging by the name C#, it looks like a language derived from and similar to C, so, in principle, it should be possible to write OFX plugins in it.

The reason you may get the impression that OFX requires C++ is that the sample code from the Open Effects Association is in C++. But the basic principles of OFX are so simple that really you should be able to use any language. Essentially you mostly pass some text strings between the plugin and the host (e.g., Vegas).

All the information needed to create OFX plugins can be found on the Open Effects Association web site.

I should point out, however, that OFX plugins are for video only, as they have no access to the audio. So, for what you have asked initially, you probably need a script.

marcinzm wrote on 7/31/2018, 1:43 PM

Ok Thank you again for full explanation. You have just mentioned that OFX plugins doesn`t have access to audio track content. So please write to me whether it is possible to write any other plugin, not OFX plugin, which will be compatible with Vegas Pro 15 and have access to audio track content.

Red Prince wrote on 7/31/2018, 2:51 PM

So please write to me whether it is possible to write any other plugin, not OFX plugin, which will be compatible with Vegas Pro 15 and have access to audio track content.

I don’t know, but maybe someone else can answer that question. I would actually be quite interested in that because I would love to write a video plugin that can react to the sound.

marcinzm wrote on 7/31/2018, 3:42 PM

Autoduck in Audacity software works perfectly. I wonder because Vegassaur (Voice Over) is able to process audio and video track so as you can see it is possible, but maybe the script does the processing. What do you think about it? Take a look at Vegassaur (Voice Over) plugin screenshot on their page.