How to change the aspect ratio of pictures

I use iPhoto to create a slide show that is exported to a MPEG-4 file and burned to a DVD.  It is not possible for some of the photos to crop to a ratio of 16:9, so I thought I could use Photoshop to change the proportions.  Here's what I did:

  1. Photo open in Photoshop
  2. Select Imageecurrent height and size of the note. Multiply the height of 1.77.
  3. Enter a new dimension with the same height and width calculated in step 2. Leave the box checked for parent.
  4. Optional: change the extension of the zone.
  5. Click OK.
  6. Configure tool Selection Rectangle Fixed Ratio style with a width of 16 and a height of 9.
  7. Use the Marquee Selection tool to select photo from top to bottom, which will leave an extra canvas on the side. A purple guide line appears when the top and the bottom of the photo match exactly.
  8. Move the selection area so that the sides are evenly spaced. A purple guide line appears when the photo is exactly centered.
  9. Select ImageeCrop.
  10. Select fileeeQuick Export to JPEG export.
  11. Save the photo. Confirm that you want to replace it.
  12. Select file closeeand validate without saving.

These new images seem to create when they are imported into the slide show, but when I export the slide show as a MPEG-4 video file, each photo that has been resized in Photoshop displays as a blank, black slide.  Is there something I'm doing wrong that corrupt these images and made them unreadable?  Any help would be appreciated.  Thank you.


PS - I use Photoshop CC (2015) on a Mac.

Just use the crop tool.

In the Options bar set Ratio and put 16 in the field width and height 10.  Do not specify steps and units.

Make sure the background color is black and drag the crop tool in the image.

When he arrives on the edges, keep dragging, and any extra fabric created will be black.

BTW, I don't know how it works with the Mac systems and apps like speech, but PowerPoint in Windows is a PITA when it comes to changing the proportions.  One might think, it could be done in a few clicks, but you need to change the size of the Page, then go to each image in turn and reset it, and then drag to fill the screen.   And yes I realize that you produce a DVD to watch on a TV.  Windows uses applications like ProShow Gold and professional for that.  I've never used them (I use Premiere Pro) but I recently had a short play with Proshow Gold, and I was very impressed.

Tags: Photoshop

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