Author Topic: Import video with alpha channel?  (Read 6024 times)

davedancer90

    Reputation: 1
Import video with alpha channel?
« on: May 15, 2013, 05:50:05 pm »
May 15, 2013, 05:50:05 pm
Hi guys,

Lumion is really awesome and jaw dropping...

We recently filmed a guy on a treadmill in front of a green screen
and would really like to import the keyed footage (e.g. his silhouette) into Lumion.

How could we do it? Can Lumion handle Videos with alpha channels. We would really like to have his movements in the project!!!

Thanks for your help!!!!!!!!!!   ::)  ::)

gonzohot

    Reputation: 37

davedancer90

    Reputation: 1
Re: Import video with alpha channel?
« Reply #2 on: May 15, 2013, 06:56:53 pm »
May 15, 2013, 06:56:53 pm
Thank you so much!! unfortunately i can't open your link. I am a student and we are trying to use lumion for a film project (experimental)..

Is it because I am not registered as commercial user???? I don't own a licence myself...

gonzohot

    Reputation: 37
Re: Import video with alpha channel?
« Reply #3 on: May 15, 2013, 07:38:07 pm »
May 15, 2013, 07:38:07 pm
Well, I forgot that this part of the forum is a restricted area...
Feel free to contact me by PM and maybe i can help you with your project.

Re: Import video with alpha channel?
« Reply #4 on: May 16, 2013, 12:57:31 am »
May 16, 2013, 12:57:31 am
Lumion only support use of MP4 as a video texture.

As such MP4 does not provide for an alpha channel for chroma keying.

Thanks gonzohot for your offer of assistance. +5


Gilson Antunes

    Reputation: 123
Re: Import video with alpha channel?
« Reply #5 on: May 16, 2013, 01:41:57 am »
May 16, 2013, 01:41:57 am
Could have a selection of color and sensitivity to enable transparency.
That would be great.
Surely this has already been requested. :)
Gilson Antunes
GTX 1080Ti / GTX Titan X / Win7 / (TM) i7-6700K CPU @ 4,00GHz / RAM 64Gb DDR-4 / SSD 1,5Tb

Re: Import video with alpha channel?
« Reply #6 on: May 16, 2013, 10:44:29 am »
May 16, 2013, 10:44:29 am
Yes, there has been various requests for transparency or some form of color keying, on the Wishlist   :)

actually, just thinking aloud, then it would be possible to do in-place presentations - live footage with 3d model designs,  :-9

davedancer90

    Reputation: 1
Re: Import video with alpha channel?
« Reply #7 on: May 16, 2013, 11:17:06 am »
May 16, 2013, 11:17:06 am
Yeah keying in Lumion hahah...

We are going to key the green screen footag in After Effects so gonzos solution might be working for us... thank you guys!    :) :) :)

gonzohot

    Reputation: 37
Re: Import video with alpha channel?
« Reply #8 on: May 16, 2013, 01:21:03 pm »
May 16, 2013, 01:21:03 pm
We are going to key the green screen footag in After Effects so gonzos solution might be working for us... thank you guys!    :) :) :)

Keep us informed about your project: what i saw on viméo is very promising ! keep going !

davedancer90

    Reputation: 1
Re: Import video with alpha channel?
« Reply #9 on: May 16, 2013, 06:54:49 pm »
May 16, 2013, 06:54:49 pm
Gonzohot! I was watching your tutorial yesterday... We are stupid  |:( |:(

I just wanted to know what file format you choose when you export your models to lumion?

--> do you have to do something in lumion?

And do you have to use .dds or can we use pngs ?


Thanks man!!!!!!!!!!!  :) :) I would like to share the first test with you today ;)

gonzohot

    Reputation: 37
Re: Import video with alpha channel?
« Reply #10 on: May 16, 2013, 10:04:51 pm »
May 16, 2013, 10:04:51 pm
Gonzohot! I was watching your tutorial yesterday... We are stupid  |:( |:(

I just wanted to know what file format you choose when you export your models to lumion?

--> do you have to do something in lumion?

And do you have to use .dds or can we use pngs ?


Thanks man!!!!!!!!!!!  :) :) I would like to share the first test with you today ;)


The file format for export is regular FBX with animation (just let standard autodesk options by default). For your images you can use any alpha compatible format: TGA, PNG, DDS but it will results in different lumion library's file size. The better choice for me is DX1 with 1bit alpha: it gave me the smaller files with less videoRAM used for display it and calculate in Lumion...

davedancer90

    Reputation: 1
Re: Import video with alpha channel?
« Reply #11 on: May 16, 2013, 10:51:58 pm »
May 16, 2013, 10:51:58 pm
Yeah we got the alpha to work...!!!

Still some glitches with video though (flickering)... do you use a specific framerate?   |:(


davedancer90

    Reputation: 1
Re: Import video with alpha channel?
« Reply #12 on: May 17, 2013, 11:39:36 am »
May 17, 2013, 11:39:36 am
We had the issue that we sometimes see the planes moving up or down.... i don't know how you solved that..

gonzohot

    Reputation: 37
Re: Import video with alpha channel?
« Reply #13 on: May 17, 2013, 01:24:36 pm »
May 17, 2013, 01:24:36 pm
We had the issue that we sometimes see the planes moving up or down.... i don't know how you solved that..

It is not solved at the moment.

About framerate you have to use 30

naderwanis

    Reputation: 0
Need help to put a green screen shot on lumion
« Reply #14 on: February 07, 2014, 10:29:35 am »
February 07, 2014, 10:29:35 am
Hi
Kindly help me to put a green screen shot on lumion ...
to show the result without the green
will be waiting for your kind reply

you can send the reply to naderwanis at gmail.com