Vertical Video - makes my head hurt

[mark_m]

I have a video camera that I will turn on its side to capture in portrait (vertical) orientation.

I will feed that into Isadora via HDMI capture. The image will be HD (1920 x 1080) and in landscape orientation.
So I need to rotate that image 90 degrees so that it matches the orientation of the camera. I will use this image across lots of scenes.

I thought I would go:

1. video in watcher to projector to a virtual stage. 
2. Make the virtual stage 1080 x 1920 px
3. Spin the projector 90 degrees
4. Use Get Stage Image of virtual stage to bring the rotated image in the correct orientation into my scenes.

However, my camera input on the virtual stage does not fill that 1080 x 1920 px stage: I have to zoom in to 175% on the virtual stage's projector to make it do so.
I think this is affecting the image quality.

I tried this:

1. video in watcher to projector to a virtual stage. 
2. Make the virtual stage 1080 x 1920 px
3. Spin the projector 90 degrees.
4. In the projector turn OFF keep aspect
5. change height to 55% and width to 178
6. Use Get Stage Image of virtual stage to bring the rotated image in the correct orientation into my scenes.

So this works better, but is this having an effect on image quality too? 

OR am I missing something very, very obvious?!

Here's the  project file for anyone curious...

vertical-video.zip

Or a link to the Isadora file in Dropbox:

https://www.dropbox.com/scl/fi...


Thank you all! 

Mark (no....)

[dbini]

Hi Mark, yeah, vertical video is a pain. i think you can fix the scaling issue in Izzymap. Set up a Virtual Stage with resolution 1080x1920, feed your video capture into this. Open IzzyMap in the virtual stage and change the output (bottom right) to Custom: 1080x1920, and rotate your output slice. It should then give you a full res vertical unscaled output from Get Stage Image. 

[jfg]

@mark_m

I have tried this too and  I think, you don't lost so much quality  as if you zoom in. But you don't need to change the Stage setting to 1080x1920. So you have only to reduce the zoom to 57%.

Best regards

Jean-François  Guiton 

[jfg]

@mark_m said:

tried this:
video in watcher to projector to a virtual stage. 
Make the virtual stage 1080 x 1920 px
Spin the projector 90 degrees.
In the projector turn OFF keep aspect
change height to 55% and width to 178
Use Get Stage Image of virtual stage to bring the rotated image in the correct orientation into my scenes.

 I have made a new essay with your patch and a virtual scene. I haven't seen before that your output is 1200 and not 1080.
Even so, it works with a slight adjustment:

video in watcher to projector to a virtual stag
Make the virtual stage 1920x1200px
Spin the projector 90 degrees.
In the projector turn OFF keep aspect
change zoom to ± 62%
Use Get Stage Image of virtual stage to bring the rotated image in the correct orientation into my scenes.