To manually set the output quality, however, click the Quality popup, choose Custom, and drag the slider to set your desired bit rate. The resolution, this has been simplified from earlier versions of iMovie, where you just need to select your required resolution. Here is a simple solution: press Command-Shift-3 to take a screenshot on Mac, open the screenshot image and change its resolution to 3840x2160 or bigger in.You can choose between audio and video, or just audio. The output format, done by clicking the Format popup menu.Click the Share button in the toolbar, and then click File. The tags for the shared movie, done by clicking and typing out tag names, separated by commas. In the iMovie app on your Mac, select a movie, trailer, or clip in the browser.Then, select the project in the Projects pane and click the Share button in. The description, done by clicking this field and typing a new description (within character limits). To export an Imovie project to MP4 on an iPhone, first open the project in Imovie.The title of the shared movie, done by clicking the name at the top and typing a new name. If youre working with an old version of iMovie, you should see the Export using QuickTime option in the Share menu, just click this option, and a new dialog.Once you're in this window, you'll be prompted to put in a variety of different types of information. When you've refined your edited movie to perfection and it's ready for its final export, you'll again need to head to the Share button in the toolbar, then click on File.

How to save imovie on mac as mp4