Playing transparent video layers

  • Hey everyone,

    I have a problem with Isadora video playback. I have prepared some still animation, which was rendered out from
    .png files to a .mov file with an alpha channel. Isadora does not seem to understand that the layers should only
    contain a figure data and no background. Changing the blending modes does not help neither, additive and transparent
    modes just create transparent figures and opaque just brings in a black background.
    Any help appreciated

  • Try different render options. I am sure there is something that in not right.

     I use transparencies a lot. Usually I render into PNG or ProRes or HAP with alpha(millions colors+). The most effective way to layer transparencies in Isadora is to set each Projector to different layer (0;1;2;3....0 being the bottom one). and blending to T.

  • So in the case of three layers (background, figure 1 and figure 2) you would use three movie players and three projectors?

  • Dear @vienastadas

    What codec did you use when exporting the movie files? Choose **Window > Show Movie Inspector** to see what codec it says there -- it will be next to the word "Format"

  • Hey Mark, I am running Isadora on Win, and I do not think there is a way to check codecs.

  • @vienastadas

    Yes, several movie players and projector pairs are one way to do this(I thought you are using this method). I recommend to try to re-encode the movies using PNG+ codec and see how this plays out. It should work on windows as well as on mac.
    There is very good codec for both platforms that Resolume developed - DXV that supports alpha as well.

  • Dear @vienastadas

    Are they WMV or AVI files? If so, here's a tool to do it:
    Otherwise, if they are QuickTime movies, the same command I listed previously is in the Windows version of QuickTime player.

Log in to reply

Looks like your connection to TroikaTronix Community Forum was lost, please wait while we try to reconnect.