4K resolution is widely predicted to be the main development trend of video resolution, which is on the way to all of us, although 1080p High Definition format has not yet been covered wholly. 4K resolution is able to offer over 8.8 megapixels cinema-class image effect. However, it is also costly to achieve 4K Ultra HD, for the data amount of each frame is as big as 50MB. That is to say, the facilities of top configuration are required for both decoding, playing and editing a 4K Ultra HD video.
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In consideration that many 4k video player software runs only on PC and no 4K uhd player for Android, iPhone, iPad is available, users are left with no choice but to seek for other methods to play 4k videos on Android Samsung, HTC, iPhone iPad etc as those devices are incapable to support 4k videos either. As a matter of fact, to play videos in 4K resolutions on those devices with superb quality, there is another way to go in addition to 4k media players: convert 4k videos.
Users can convert 4K video to common used video formats with a 4K video converter. Based on the feedbacks on the forum, a professional 4k video converter named Pavtube Video Converter Ultimate/iMedia Converter for Mac is highly recommended. This all-in-one converting tool is surely in the support of converting 4K UHD videos in any formats faultlessly. As the aspects of this 4K video converter you guys highlight are: ease of use, fast speed to the utmost, 100% clean and multifunction. Here is review.
Now follow the guide below to learn how to convert 4K Video to MP4 for watching on Any device.
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Quick tutorial on how to downscale 4K UHD to 1080P HD on Mac El Capitan
Step 1. Load source 4K videos
Install and launch the best 4K to 1080p converter on your Mac, then drag and drop your 4K footage to it. You can also click “Add video” button to load your 4K UHD videos. Batch conversion is supported so that you can add multiple files to convert a time. 
Step 2. Select output format
Now select a proper format as the output format from the drop-down-list of “Format”. There are MP4, MOV, AVI, WMV, etc. available for your choice. If you want to convert 4K footage to editing in Final Cut Pro, Premiere Pro, Avid or iMovie, there are professional encoders like ProRes, MPEG-2, DNxHD, Apple Intermediate Codec, etc. in “FCP”, “iMovie and Final Cut Express” , “Avid Media Composer”, “Adobe Premiere/Sony Veags” category. as example. After selecting the output format, you can choose an output path as the destination folder to save the converted 1080p movie. 
Step 3. Set 1080p resolution
Click “Settings” button to customize these settings. To down-convert ultra HD 4K to 1080p, do remember adjusting video size to 1920*1080 which is 1080p. Meanwhile, other parameters can be adjusted according to your own requirements. 
Step 4. Start to convert/compress 4K to 1080p without losing any quality
Once you’re sure all the settings is OK, click the “Start conversion” button to start converting 4K to 1080p on your Mac. When the conversion completes, click “Open” button to locate the 1080p videos. Now yo can do a lot the image and retain detail for a beautiful 1080p finish with highest quality and makes your computer run faster during your edit/grading/playback/uploading process.
About 4K Ultra HD Video: 4K Ultra HD (4K UHD) video itself refers to the video of a pixel resolution of 4096×2160 (4,000 pixels, 8.8 megapixels, 17:9 aspect ratio) mainly for digital cinema, or of a resolution of 3840×2160 (8.3 megapixels, 16:9 aspect ratio) mainly for Ultra HD television.
