How to Play Panasonic GX9 4K in QuickTime Flawlessly

I have a 4K video in an mp4 container (H.264) from Panasonic GX9. QT player would not play it fluidly (though I suppose it's normal). Can I play Panasonic GX9 4K in QuickTime? 

Apple has offered 4K playback support on OS X Mavericks, but with limits. Even if you can add a 4K video to QuickTime player, it is still an exercise in frustration- content on the display appeared tiny. What you can do is to scale the 4K resolution and tweaking a setting. To view Panasonic GX9 4K MP4 in QuickTime, what you need is to convert GX9 4K video to QuickTime playable format first. 

Brorsoft 4K Video Converter Mac is recommended, which is an all-in-one tool that can help you to convert and downscale 4K videos within one stop. Overall, this program is a completely professional 4K video converter and player. Just like the way it is dealing with 1080p videos, it is surely in the support of converting 4K videos in any formats faultlessly. With it, you can fast convert Panasonic GX9 4K to QuickTime playable format with least quality loss. It is also available to customize the output resolutions to any size the users want. Plus, it provides optimal presets for video editing programs like Final Cut Pro, iMovie, Avid Media Composer, Davinci Resolve, Adobe Premiere, etc. For Windows users, turn to 4K Video Converter to ensure perfect 4K playback. 

How to view 4K Panansonic GX9 4K videos in QuickTime Player 

Step 1. Load 4K footage 

Launch the 4K Converter Mac. Drag & drop GX9 4K .mp4 files to the program directly and your files would be added instantaneously. Or you can head to the "Add" button to locate the 4K videos you want to add. 

 

Step 2. Select output format 

Click format you choose MOV as target format. This video app offers the QuickTime Movie Format for you. Or, you can also choose "Common Video -> MOV - QuickTime (*.mov)" as the output format. 

 

Step 3. Tweak video, audio settings 

Click "Settings" button; you can adjust video and audio settings, including codec, aspect ratio, bit rate, frame rate, sample rate, and audio channel. To down-convert ultra HD 4K to 1080p for easier playback, you just need to adjust video size to 1920*1080. 

Step 4. Start 4K to QuickTime conversion 

Hit the "Convert" button to let this smart converter start encoding GX9 4K footage. When the conversion is done, you can play the converted Panasonic GX9 4K MP4 in QuickTime player without hassle. 

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