. Record video for your trailer right in iMovie Create beautiful movies. Choose from 8 unique themes with matching titles, transitions and music. Give your movie the perfect look with 13 Apple-designed video filters. Choose from 11 animated title styles like Split, Reveal or Pop-up. When you import media or open a library in iMovie 10.1.11 or later on a Mac with macOS Mojave, a window appears that lists incompatible media files in your library. To convert incompatible media files immediately, click Convert in the window. IMovie creates copies of the media files in the H.264 format. Not worthy of the ‘apple’ title I have used Apples for years and iMovie and and off for a while. IMovie has always been at odds with the Apple ethos of ‘it just works’. You would think by now iMovie would have fallen into line with how eveyrthing else works on a Mac but apparently not.
As part of the transition to 64-bit technology in macOS, you may see an alert in iMovie about media files that won't be compatible with macOS Catalina.
Before you upgrade to macOS Catalina, you can use iMovie to detect and convert all incompatible media files so they'll be compatible with future versions of macOS. After you upgrade to macOS Catalina, the option to convert the incompatible files will no longer be available.
To make sure new media you create is compatible with macOS Catalina, use cameras and media formats supported by iMovie.
Door kickers: action squad. In macOS Catalina, you might see an incompatible media message in the viewer when trying to play incompatible media if you haven't converted it before upgrading to macOS Catalina.
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Detect and convert incompatible media files in iMovie on macOS Mojave
When you import media or open a library in iMovie 10.1.11 or later on a Mac with macOS Mojave, a window appears that lists incompatible media files in your library.
To convert incompatible media files immediately, click Convert in the window. iMovie creates copies of the media files in the H.264 format. The original files are moved to an iMovie Incompatible Media folder, located in the same folder as the library. Your original media is not modified.
If you want to convert them later, you can use iMovie to scan the library and convert the incompatible files:
- In iMovie choose File > Check Media for Compatibility.
- In the window listing incompatible media files, click Convert.
Learn more about how iMovie detects and converts incompatible media files.
![Download Download](https://images.idgesg.net/images/article/2017/11/imovie-titles-100741173-large.jpg)
Formats compatible with macOS Catalina
These video, audio, still-image, and container formats are compatible with iMovie on Mac computers with macOS Catalina:
Video formats
- Apple Animation Codec
- Apple Intermediate Codec
- Apple ProRes
- AVCHD (including AVCCAM, AVCHD Lite, and NXCAM)
- DV (including DVCAM, DVCPRO, and DVCPRO50)
- H.264
- HDV
- HEVC
- iFrame
- Motion JPEG (OpenDML only)
- MPEG-4 SP
- Photo JPEG
- XAVC-S
Still-image formats
Audio formats
Container formats
Media formats affected by the transition to 64-bit technology
Examples of media that will be affected by the transition to 64-bit technology include video files from early Flip Video cameras that use the 3ivx codec, early web videos encoded with the Sorenson codec, and media converted from DVD to the DivX format.
Third-party developers may continue to offer compatibility with some formats by building support directly into their apps. Contact developers of third-party apps for more information about media formats supported in their apps.
Here are some examples of media formats affected by this transition:
- 3ivx MPEG-4
- AV1 / VP9
- AVC0 Media AVA0 Media
- BitJazz SheerVideo
- CineForm
- Cinepak
- DivX
- Flash Video
- FlashPix
- FLC
- H.261
- Implode
- Indeo video 5.1
- Intel Video 4:3
- JPEG 2000
- Microsoft Video 1
- Motion JPEG A
- Motion JPEG B
- On2 VP3, VP5, VP6, VP6-E, VP6-S, VP7, VP8, VP9
- Perian collection of codecs (Microsoft MPEG-4, DivX, 3ivx, VP6, VP3, and others)
- Pixlet
- Planar RGB
- QuickTime files encoded using still image formats (SGI, TGA, PNG, and others)
- RealVideo
- Sorenson 3
- Sorenson Sparc
- Sorenson Video / Video 3 / YUV9
- Streambox ACT-L2
- Windows Media Video 7, 8, 9
- Xiph.org’s Theora Video
- ZyGoVideo
Convert incompatible media not contained in an iMovie library
To convert an incompatible media file, open it with QuickTime Player (version 10.0 and later) in macOS Mojave or earlier, then save a copy with a new name. This method isn't supported in macOS Catalina.
You can also use Compressor to transcode one or more media files into a format such as H.264, HEVC, or Apple ProRes. These formats will be supported in versions of macOS after macOS Mojave. H.264 and HEVC preserve image quality with the smallest file size. ProRes preserves the best image quality and provides better performance when editing in iMovie, but creates much larger files that use more storage space than H.264 and HEVC files use.
Edit in iMovie on iPhone or iPad
After you add video clips and photos to the timeline of your project, you can make a clip longer or shorter, change the sequence of clips, or split a clip into two separate clips.
Make a clip shorter or longer
You can trim a video clip or a photo so it appears for a shorter or longer period of time in your project.
- With your project open, tap the video clip or photo in the timeline. A yellow highlight appears around the selected clip.
- To zoom in on the clip, pinch open in the center of the timeline. When you zoom in, you can see more detail in the clip, which can make it easier to edit.
- Drag the beginning or end of the clip to make the clip shorter or longer:
- To make the clip longer, drag the edge of the clip away from the center of the clip.
- To make the clip shorter, drag the edge of the clip towards the center of the clip.
If you can't drag the edge of the clip, there might not be additional video at the beginning or end of that clip. For example, if you added a video clip that’s 20 seconds long, you can’t make it longer than 20 seconds. It might also mean the clip is at the shortest length allowed by iMovie, which is 0.3 seconds. If you still want to change the duration of a clip, you can try slowing down or speeding up the clip.
Change the sequence of clips
You can change the sequence of clips in the timeline to change when a particular clip appears in your movie. With your project open, touch and hold the video clip or photo in the timeline until it rises off the timeline, then drag and release where you'd like the clip to appear in your project.
Split a clip into two separate clips
When you split a clip, you can adjust the duration of each section, remove unwanted sections, or add different titles to each section.
- Scroll in the timeline to position the playhead (the white line) where you want to split the clip.
- If necessary, pinch open in the center of the timeline to zoom in on the clip.
- Tap the clip, tap the actions button , then tap Split. Or tap the clip, then swipe down over the playhead on the clip, as if you were slicing through the clip with your finger.
iMovie places a None transition (also known as a cut) between the two newly created clips. You can change this transition to a cross-dissolve or other transition.
Edit in iMovie on Mac
After you add video clips and photos to the timeline of your project, you can make a clip longer or shorter, change the sequence of clips, or split a clip into two separate clips.
Make a clip shorter or longer
You can trim a video clip or a photo so it appears for a shorter or longer period of time in your movie.
- With your project open, scroll the timeline to locate the clip you want to trim.
- To zoom in on the clip, choose View > Zoom In, or press Command–Plus sign (+) or pinch the trackpad. When you zoom in, you can see more detail in the clip, which can make it easier to edit.
- In the timeline, hover your pointer over the beginning or end of the clip that you want to trim until your pointer becomes the clip trim tool . The arrows indicate which directions you can trim the clip:
- To make the clip longer, drag the edge of the clip away from the center of the clip.
- To make the clip shorter, drag the edge of the clip toward the center of the clip.
![Apple Imovie 11 Apple Imovie 11](https://images.sftcdn.net/images/t_app-cover-l,f_auto/p/c505c260-9b2a-11e6-a75e-00163ec9f5fa/1239129428/imovie-screenshot.jpg)
If you can't drag the edge of the clip, it means there is no additional video at the beginning or end of that clip. For example, if you added a video clip that’s 20 seconds long, you can’t make it longer than 20 seconds. It might also mean the clip is at the shortest length allowed by iMovie, which is 0.1 seconds. If you still want to change the duration of a clip, try slowing down or speeding up the clip
Add or remove frames with the clip trimmer
For more precise editing, you can use the clip trimmer to add or remove individual frames from a video clip. You can also see how much of your clip is being used in your movie.
- In the timeline, select the clip you want to trim.
- Choose Window > Show Clip Trimmer. The selected clip appears in the clip trimmer, above the timeline. The part of the clip that is visible in your movie appears between the two white lines, and the parts of your clip that don't appear in your movie are dimmed and outside the white lines.
- Hover your pointer over the line at the beginning or end of the clip until the clip trim tool appears, then make the clip longer or shorter:
- To make the clip longer by adding frames, drag away from the center of the clip.
- To make the clip shorter by removing frames, drag toward the center of the clip.
You can use a different portion of the same clip while maintaining its length in the project:
- In the clip trimmer, hover your pointer over the clip until the clip trimmer tool appears.
- Drag the selected portion of the clip left or right.
- To close the clip trimmer, Press Return.
Change the sequence of clips
You can change the sequence of clips in the timeline to change when a particular clip appears in your movie. With your project open, click the video clip or photo in the timeline, then drag the clip left or right depending on where you want the clip to appear in your movie:
- If you want the clip to appear earlier, drag the video clip to the left, then release.
- If you want the clip to appear later, drag the video clip to the right, then release.
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You can also move multiple clips at once:
- Hold the Command key as you click each clip you want to select, drag a selection rectangle around the clips, or hold the Shift key as you click each clip.
- Drag the clips to a new location in the timeline.
Split a clip into two separate clips
When you split a clip, you can adjust the duration of each section, remove unwanted sections, or add different titles to each section.
- Scroll in the timeline to position the playhead (the white line) where you want to split the clip.
- If necessary, choose View > Zoom In or press Command–Plus sign (+) to zoom in on the clip.
- To split the clip, choose Modify > Split Clip or press Command–B .
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After you split the clip, add a transition like a cross-dissolve between the clips.