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Thread: Invisible Backgrounds

  1. #11
    Join Date
    Oct 2004
    Location
    UK - Milton Keynes
    Posts
    807
    Quick message to say thanks for all the info - just finished the fashion show and all went well - got all the required images invisible using a mix of all the suggestions...

    Got some good results with inverse tint too - but a little bit stuttery on some playback... where invisible white or black didn't as much...

  2. #12
    Quote Originally Posted by Mr_P
    but a little bit stuttery on some playback...
    how many layers?

    what discs?

    Which computer?

    where you using your g4 with the delta audio card?

  3. #13
    Join Date
    Oct 2004
    Location
    UK - Milton Keynes
    Posts
    807
    Using 1 x layer as animated background - cloud loop (feedback video - 006 SD_Cloud010.mov)
    + 1 x layer as tiff object with either embedded invisible background (see attached) or invtint on the white background (depending upon picture) - object then moved from L to R of screen with x,y posn
    (ie a shoe flying through the clouds!)

    Noticed a slow down of the background as the 'shoe' moved across the screen - normal playback resumed as soon as the shoe disappeared

    Using a G5 2G mac with 2GRam - clean up-to-date hired machine - think it was a SATA drive, but might have been a fast SCSI one (wasn't my G4! - I only use it for pre-production)

    Incidentally - are there any issues concerning xfade between a PAL and NTSC clips? Is it recommended to stick to one format - or doesn't it matter?
    Attached Files Attached Files

  4. #14
    Quote Originally Posted by Mr_P
    Using 1 x layer as animated background - cloud loop (feedback video - 006 SD_Cloud010.mov)
    + 1 x layer as tiff object with either embedded invisible background (see attached) or invtint on the white background (depending upon picture) - object then moved from L to R of screen with x,y posn
    (ie a shoe flying through the clouds!)

    Noticed a slow down of the background as the 'shoe' moved across the screen - normal playback resumed as soon as the shoe disappeared
    this image isnt huge - there should not have been any change in graphics speed.
    Quote Originally Posted by Mr_P
    Using a G5 2G mac with 2GRam - clean up-to-date hired machine - think it was a SATA drive, but might have been a fast SCSI one (wasn't my G4! - I only use it for pre-production)
    Disc speed wont make any difference if all you had was a still moving over an animated background.
    Is that all you had?
    Quote Originally Posted by Mr_P
    Incidentally - are there any issues concerning xfade between a PAL and NTSC clips? Is it recommended to stick to one format - or doesn't it matter?
    None issues whatsoever except they are slightly different sizes, and in the real world the pixel aspect ratio is different. NTSC and PAL might have different native gammas.
    NTSC is 720x480 PAL is 720x576
    as far as catalyst is concerned it doesnt matter. I dont take any notice of the frame rate.

  5. #15
    Quote Originally Posted by Mr_P
    Noticed a slow down of the background as the 'shoe' moved across the screen - normal playback resumed as soon as the shoe disappeared

    You can use the statistic HUD to see if there any slowdowns.

    The three values at the bottom summarise performance.

    Movies- if your movie value approaches 100% - you are doing too much with your discs. Low values are good.
    Graphics - if you are drawing too many things will approach 100%. Low values good.
    Timing - accuracy of playback based on overall timing. 100% is good.
    Attached Files Attached Files

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