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it:techniques:alpha [2014/03/16 08:03] – carbat01 | it-it:9.0:techniques:alpha [2022/12/18 11:20] (current) – external edit 127.0.0.1 | ||
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- | ======Usare | + | ======Usare |
- | Video Canale Alpha e PicturesToExe | + | Video con canale alfa e PicturesToExe |
==== Spiegazione ==== | ==== Spiegazione ==== | ||
- | Let’s begin with an explanation of what a video with alpha channel is, and what might be done with videos or video effects using this technology. Since most users are familiar with gif and png files with transparency, were this transparency extended to video, | + | Cominciamo con una spiegazione di cosa sia un video con canale alfa, e di cosa sia possibile fare con i video o gli effetti video che utilizzano questa tecnologia. Poiché la maggior parte degli utenti conosce i file GIF e PNG con trasparenza, se questa trasparenza venisse estesa al video, |
==== Tecniche ==== | ==== Tecniche ==== | ||
- | Using these techniques, it is possible to produce effects such as three dimensional motion text, objects moving | + | Usando queste tecniche, è possibile produrre effetti come movimento di testo tridimensionale, oggetti che si muovono |
- | ==== Video Canale Alpha RGBA avi ==== | + | ==== Video RGBA avi con canale alfa ==== |
+ | {{ it-it: | ||
+ | Nell' | ||
- | Above we see the direct use of RGBA avi format alpha channel videos. The flaming asteroid video was created with a software product called ParticleIllusions which allows the user to create their own special effects such as flames, smoke, celestial objects, etc. This software is widely used by the movie industry and although relatively expensive, can be a valuable asset for those wishing to experiment with animation and special effects. The three dimensional animated text was created with a product called BluffTitler which is a relatively inexpensive but very useful software which allows, among other things, the creation of customized animated three dimensional text. Both of these products along the the Huffyuv 2.2.0 codec provide for output in RGBA avi format. At the end of this section are links to the actual YouTube video samples created with PicturesToExe and shown as screen captures above and later in the sample below. | ||
- | The third party generated | + | I video RGBA avi di terze parti sono stati inseriti direttamente |
- | ==== Video canale Alpha MOV o Flash FLV ==== | + | ==== Video MOV o Flash FLV con canale alfa ==== |
- | The following screen capture demonstrates the use of an MOV format alpha channel | + | L' |
- | The alpha matte is a pure black and white duplicate of the alpha channel | + | Il mascherino alfa è un duplicato in puro bianco e nero del video con canale alfa. Le aree di trasparenza nel canale alfa incorporato sono nere nel mascherino alfa e le aree del soggetto sono bianche. Pertanto quando il mascherino alfa è usato con PicturesToExe |
- | In the example below, the alpha matte for the plant in the foreground with flowers was used as the video mask. The color video was placed inside the mask container and this ensemble resides on the layer above the fall scene still image background. In this specific case, the alpha matte was not available from the source and was created by importing the original color MOV format video with embedded alpha channel into the freeware | + | Nell' |
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==== Esempi in Youtube ==== | ==== Esempi in Youtube ==== | ||
+ | {{youtube> | ||
+ | {{youtube> |
it-it/9.0/techniques/alpha.1394957003.txt.gz · Last modified: 2022/12/18 11:20 (external edit)