9 Replies Latest reply: Feb 5, 2013 10:13 AM by Warren Heaton
Madinmumbai Level 1 Level 1 (0 points)

I am playing around with FCP 7 on a friends machine.

 

My sequence setting is 720X 576 and the clip setting is 768 X 576. After editing the clip, which is scaled up to 125% to enable compositing of two layers. I have generated a letterbox of 720 X 576 that I have placed in the layer above. This is the result I am getting. Why is image being overscanned? Shouldn't the Canvas be the same setting as the sequence setting?

 

Sample.jpeg


iPad 2 Wi-Fi + 3G, iOS 5.1.1
  • 1. Re: FCP 7 sequence setting difference on Canvas
    RatVega™ Level 4 Level 4 (1,910 points)

    I can't tell you specifically what is happening, but I'll guess that you are using the Widescreen filter on uncropped footage. Try cropping the footage to the sequence dimensions and see if this eliminates the "overscan." If it does not, you can always build the letterbox using a pair of mattes (but this will mean a lot of rendering.)

     

    Good luck

  • 2. Re: FCP 7 sequence setting difference on Canvas
    Madinmumbai Level 1 Level 1 (0 points)

    I can't crop the footage as I have tilted both shots. They are at almost 20 degrees, any cropping brings the crop marks into the center of the frame. The funny thing is the over scan is happening in height where the frame should be 576 pixels only even if the clip is 768 X 576.

  • 3. Re: FCP 7 sequence setting difference on Canvas
    Warren Heaton Level 3 Level 3 (540 points)

    Open the superimposed clip in the Viewer window and check the Distort setting under the Motion tab.

     

    If it's at "0", slide it to left or right and view the results.  If this were NTSC DV instead of PAL DV, you' be looking at going to +12.5 or -12.5.  Or, if it's already at +12.5, try changing it to 0, etc.  PAL may show up at +11, or -11... been a really long time since I've worked with either SD DV or SD PAL, but I'm pretty sure this will get you the results that you are looking for.  Since it's already matching the width of the Canvas, you should not have to adjust the Scale value (also under the Motion tab).

     

    For what it's worth, "overscan" isn't the right term to use here as everything you see in the Viewer or the Canvas is technically "Underscan".  The term "Overscan" refers to when the picture is being displayed on a SDTV and the bevel is cropping the picture.  In this case, your superimposed picture is not "matting" the background picture.

     

     

     

    -Warren

  • 4. Re: FCP 7 sequence setting difference on Canvas
    Madinmumbai Level 1 Level 1 (0 points)

    Thanks for that Warren. I got a fix by simply putting another layer of a letterbox image scaled up 110%. But the question is why this should be happening? The canvas height and the clip height are the same i.e. 576 pixels and the letter box is designed for that height.

  • 5. Re: FCP 7 sequence setting difference on Canvas
    Michael Grenadier Level 7 Level 7 (20,125 points)

    Try nesting the clips before applying the letterbox.  The letterbox filter is only applied to the clip, not underlying video layers.

  • 6. Re: FCP 7 sequence setting difference on Canvas
    Michael Grenadier Level 7 Level 7 (20,125 points)

    I think what's happening is that you're applying the widescreen filter to a clip that's been tilted so it reveals the underlying shot.  As I said in my previous post, just nest both shots and then apply the widescreen filter.  To nest, just select both shots and hit option-c.  then apply the widescreen filter to the nest.  To adjust the parameters of the filter on the nest, option doubleclick on the nest to load the nest in the viewer.

  • 7. Re: FCP 7 sequence setting difference on Canvas
    Madinmumbai Level 1 Level 1 (0 points)

    Thanks for that. Will try it tomoroww morning. Will report on it once I do.

  • 8. Re: FCP 7 sequence setting difference on Canvas
    Warren Heaton Level 3 Level 3 (540 points)

    If the sourse footage (in this case, your matte) is seen as 720X 576 square pixel by FCP while the Sequence is 720X 576 non-square, I've noticed that FCP typically adjusts the Distort parameter for the of the source footage automatically.  As such, you have to manually revert it.

     

    Another approach: You could put RatVega's suggestion of using the Widescreen effect to use if you nest your current Sequence into another Sequence and then apply the Widescreen effect to the nested Sequence.  This will get you past the issue of having rotated your clips.  When I take this approach, I typically name the first Sequence (the one that shows the full picture) something like "Cut 2012-02-05 001" and the containing Sequence "Cut 2012-02-05 001 WIDE".

     

     

    -Warren

  • 9. Re: FCP 7 sequence setting difference on Canvas
    Warren Heaton Level 3 Level 3 (540 points)

    So... I just tried placing a 720x576 matte (made in Photoshop) into a 720x576 DV PAL Sequence and I found FCP to be fairly unforgiving when it came to adjusting the Scale and Distort parameters (it would not easily scale to fit the frame size exactly).  A 720x540 matte (also made in Photoshop with 720x405 cut out of the middle) dropped in perfectly (scaling to 106.67% and distortign to 6.67 automatically).

     

    Plan C: Try a 720x540 matte instead.

     

    Plan D (if you don't want to nest Sequences): Stack two Solids in the video tracks above your footage.  Slide one up until it mattes the upper portion correctly and slide the other down until is mattes the lower portion correctly.  When I tried this, setting the Center values to 0, 500 and 0. -500 seemed to look the best.

     

    Or course, I'm only working with what I think matches what you're working with.  Good luck!