Hi

I have a video going through a motion blur actor and I want to be able to control the amount of accumulation (within set parameters) and also switch the actor bypass on and off using a single control watcher (effectively a MIDI controller knob). I'm using a limit scale value actor to give limited control of the accum amt input on the blur actor and that's good, but I need to be able to switch the effect off (ie switch on the bypass on the actor) when the control knob goes under a certain value (8) and switch the bypass off when it goes over that value. 

Is there a way to do this? I've tried playing with trigger and value actors but can't figure it out.

I'm using Isadora 4 on a Mac.

Cheers

Emma

@mark_m

It is high on our list of things to work on next; Isadora 4.x released, and IzzyCast allowing us to spent time on other plans.

Audio is really high on the list.

@juriaan said:

You can not capture audio from a live capture device and use the audio as a 'channel' or 'signal' within Isadora at the moment.

 Wow. I never knew that. I've never needed to do it, but that's good to know. 
I can imagine how frustrating that would have been for @Patufet
Is this likely to change?

@abahmer

to create a 2667 wide image from 2 1920 wide projectors, you will have a 1,173 overlap. 

Have you tried adjusting the blend curve?

If you click on the distance value for the blend area in the stage setup, it will open a side panel with curve adjustments for the blend. So using the example of the image I included above, you click on '384' and a side panel on the right will open allowing you to adjust the blend curves.

Also, if you click the display tabs (in the case of my example image, you click the '2' or '3' tab located right of the 'DISP 3' tab) you will get the display settings, there you ca re-assign wich display is used for the section of the blend. This will allow you to swap the displays you have linked.

@dusx Thanks. I did use the blend maker and saw that initial 300+ px overlap. However, two things then happened.

1. The movie I placed in cue was smaller than that stage, so I had to make the stage smaller.
2. Due to physical constraints, my projector connections place them as displays 3 & 2 instead of 2 & 3. When I drag them to the correct sides so the image is [ ] instead of ][, that overlap changes.

I will go back and see if I can overcome #1 above.

@abahmer

Have you tried the 'blend maker'?
Using it with your projector resolution, setup in a horizontal 2x1 format as you have show, the blend maker creates a 3456x1200 px output by default. This has a 384 pixel blend area. 

@goodiebags

This seemed like an interesting project to tackle... so I made a demo file using a different approach.
I created a feedback loop into a Matte++ actor using a freeze actor. I think this approach is very flexible. Currently it has a random shape from a shapes actor as the 'brush' but you can use any image (alpha around will help :)
I might expand this a bit and make it a new User Actor offering on the Add-Ons page, what do you think?
Hope you like it!  

Brush Drawing

Hi all, 

You can not capture audio from a live capture device and use the audio as a 'channel' or 'signal' within Isadora at the moment.

You can analyze the audio stream and do sound frequency analysis on it, but the Live Camera actor only provides a video-output.

There are workarounds:

- On apple you can utilize the 'AU' actors, which are basically actors that go around the native Isadora API. That you can use an AUSoundInput and a AUSoundOutput actor

- You can utilize something as 'Loopback' where you can basically create a stream from your input to the output and 'couple' them again.

I have two matching projectors (1920x1200) set apart not quite at the center of their respective shares of a 48'x18' cyclorama -- they are pointing slightly outwards from center.

I have set up a stage in Isadora at 2667x1200 as this comes closest to matching the image size of 2400x1080 resized to 1200v pixels.

Isadora calculates the overlap at 1173px -- which is too much and it is causing distortion (repetition) of parts of the image in the blend.

Adjusting the displays only limits the output, so the problem lies in the amount of blend overlap. Take a look at these images to see the extent of the distortion.

RAW PROJECTIONS

Although not disturbing to this image, this shows the size difference between the actual overlap and the calculated stage overlap. The problem is more evident in this image (I have the blend settings set to extremes so the images are visible):

Since Isadora assumes the projector width overlaps by an overly wide amount, it takes the image portion calculated by that overlap and assigns those to the two projectors. In reality, that portion of the image is then compressed into the actual projection. With this happening on both projectors, there is a wide range of unintended image overlap.

I think the solution is to tell Isadora the actual amount of visual overlap. That should provide the proper portion of the image to each projector, thereby allowing the blend (when those controls are turned on) to function properly.

So HOW do I adjust that overlap? Thanks!

Hi Mark, sorry but english is not my first language so I may not explaining the issue clearly enough.

Live Capture Settings is configured as follows, and the meter under the channel 1 minipreview shows that audio is being received:

I tried adding the Capture Control actor with an enter scene trigger with both audio and audio+video selected, no luck.

I understand that I should get audio without any further action, so I'm starting to suspect that there is something not working correctly with my Decklink when using Isadora, as I'm also having video issues (as per my previous post), but I don't know what; all drivers are updated and changing settings at BM Desktop Video don't seem to solve anything. The exact same signal path using vMix (laptop -> BlackMagic HDMI-SDI Microconverter -> Decklink Duo -> vMix) works flawlessy, I get video and audio.

If there is nothing obvious that I may be missing I will try uninstalling/reinstalling all BM software and drivers, and if that doesn't work I will change the Decklink PCI-E slot as last resort.

Many thanks for your help!