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Edit H.265 with iMovie

Edit H.265 with iMovie

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Edit Video H.265

iMovie for Mac update H.265/HEVC support

Following the release of the macOS High Sierra software update which, enables High-Efficiency Video Coding (HEVC) on supported Macs, the Apple has issued an update to iMovie for Mac bringing the ability to import HEVC videos. iMovie version 10.1.7 for Mac adds support for importing HEVC video on macOS High Sierra.

Tips: A fairly modern system is required to do so with hardware acceleration that provides stutter-free playback and optimized battery consumption. If you have a 2017 Mac or later, you can play back 4K HEVC video with hardware acceleration. Mac models from mid 2015 or earlier work with HEVC video that was captured at no greater than 1080p at 240 fps.

From above information and tips, we can conclude that to get the best workflow of H.265 video with iMovie for Mac, there are several strict requirements:
– Make sure that you’ve installed the latest macOS High Sierra OS
– Update your iMovie to the latest 10.1.7 version
– Prepare a modern Mac computer such as 2017 Mac or later to handle 4K HEVC with hardware acceleration
– Old Mac models can only handle HEVC video no greater than 1080p at 240fps

List of Mac models compatible with macOS High Sierra

Later 2009 or later: MacBook, iMac/iMac Pro
2010 or Later: MacBook Air, MacBook Pro, Mac Mini, Mac Pro

Obviously, it is quite easy to update your old Mac to the new macOS High Sierra since most early released Mac models has perfect incompatibility with the new macOS High Sierra. What’s more, it is also pretty easy for you to update iMovie for Mac to the latest version 10.1.7 or even 10.1.8 that’s just update on Nov 01, 2017. However, for those people who wish to playback 4K HEVC video on iMovie with hardware acceleration, the condition is that you should have a 2017 Mac or later. Perhaps you can splash the cash and buy a new powerful Mac computer, but that isn’t always possible. Then here comes the issue how to get a smooth workflow of 4K H.265/HEVC with iMovie on Mac computer that’s a little old or slow.

Compress 4K H.265 to 1080p for iMovie smooth workflow

Unlike the professional NLE software Final Cut Pro or Premiere Pro CC, the consumer-level free video editing software – iMovie lacks the ability to direct create Proxy files in smaller file resolution for working on underpowered Mac computer. Fortunately, there are some third-party conversion tool can assist you to easily compress 4K H.265 to iMovie preferred high quality and high performance editing codec – Apple Intermediate Codec (AIC) with 1080p resolution. Compared with H.265, this intermediate format is much less processor intensive to work with, but it will take more space than H.265, make sure that there are enough disk space on your Mac computer.

The program we highly recommend to you here is called Pavtube Video Converter for Mac. The program is pretty simple to use, no matter experienced user or fresh could handle it very well. In addition, it also has perfect compatibility with the new macOS High Sierra. The program supports for importing both HD/4K H.265/HEVC codec wrapped with both MP4 or MKV container file format. Thanks to its batch conversion mode, you can import multiple video with different file format and codec into the application for conversion at one time.

The biggest merits of this program lies in that it can facilitate you to directly output 4K H.265 to iMovie specially optimized editing codec – Apple Intermediate Codec (AIC) with 1080p resolution, so that you can easily achieve the best HD video workflow of iMovie on even slow or underpowered Mac computer.

Edit H.265 with built-in editing tools

Apart from the video transcoding function, the program also works as your best H.265 video editor to assist you to complete some basic editing task. You can merge multiple separate H.265 video into one clip, split a large H.265 file into many smaller clips by file size, count or length, trim or cut a long H.265 video to remove unwanted parts from the beginning or end, crop the video to remove the black bars or edges around the video frame, add watermark to protect your video from being used without permission, change video picture effect or add external SRT/ASS/SSA subtitle to video.

How to Transcode and Compress 4K H.265 for iMovie Editing on Slow Mac?

Step 1: Load 4K H.265 files into the application.

Download the free trial version of the program. Launch it on your computer. Click “File” menu and select “Add Video/Audio” or click the “Add Video” button on the top tool bar to import 4K H.265 files into the program.

Load 4K H.265 files

Step 2: Output iMovie supported AIC format.

From “Format” drop-down option, choose iMovie best editing codec by selecting “iMovie and Final Cut Ex…” > “Apple Intermediate Codec (AIC)(*.mov).

Output iMovie Apple Intermediate Codec

Step 3: Compress 4K to 1080p.

Click “Settings” on the main interface to open “Profile Settings” window, in video section, from “Size(pix)” drop-down list, choose “1980*1020″ to compress 4K H.256 to 1080p Prores.

Step 4: Edit 4K H.265 video.

Click the “Pencil” like icon on the main interface of the program to open the “Video Editor” window, then start the fantastic video editing trips:


By checking the “Merge into one file” option beside the “Settings” button, the program will join all the selected video into one single file.



Click the split button on the file list to launch the Video Split window. Ticking “Enable” option, you can split the file by file count, time length, or file size.


Trim/Crop/Watermark/Apply effect/Insert subtitle

You can navigate between trim, crop, watermark, effect, subtitle to cut video length, crop video edges, apply special rendering effect, insert external subtitle.

Trim/Crop/Watermark/Apply effect/Insert subtitle

Step 5: Begin the final conversion process.

After all the settings is over, go back to the main interface and hit right-bottom “Convert” button to start to downscale and transcode 4K H.265 to iMovie best compatible Apple Intermediate Codec editing format with 1080p resolution.

When the conversion is completed, launch iMovie on your Mac computer to import converted video to iMovie for smooth editing workflow on either fast or slow Mac computer.


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