How to Change Video Resolution on Windows (10) and Mac

I have a 2 hour HD video of 1280x720 and I would like to ask if anyone knows the best method to change the video resolution from 1280x720 to 640x480 for well compatible for my iPhone iPad without the slightest loss of picture quality. Thank you!

There are many times when we need to change video resolution. We may change video resolution to make our video fit for mobiles, maybe iPhone, iPad, or an Android device. We may change video resolution for our TV. We may lower video resolution to reduce video size and save space. We may downscale video resolution to upload to YouTube or somewhere faster. Well, how to change video resolution? Here, we'll introduce the best tool to change the resolution of your video.

Part 1. What Is Video Resolution?

Before we illustrate how to change video resolution, we'd like to say more about video resolution.

What is video resolution? Briefly, video resolution refers to the number of pixels organized or arranged by width and height in each frame.

Next, we'll list the most popular video resolutions.

• SD (Standard Definition): 640x360 (360p) and 640×480 (480p)
• HD (High Definition): 1280x720 (720p)
• Full HD (FHD): 1920x1080 (1080p)
• Quad HD (QHD): 2560x1440 (1440p)
• 2K video: 2048x1080
• 4K video or UHD (Ultra HD): 3840x2160 (2160p)
• 8K video or Full Ultra HD: 7680x4320 (4320p)

To optimize your video for web, DVD, mobiles, TV and others, you may need to change video resolution. Well, how to do this? We'll explain it in the next part.

Part 2. How to Change Video Resolution?

First of all, you need to download a video resolution converter. WinX HD Video Converter Deluxe is a good choice, It supports a wide range of formats (such as MP4, MKV, MOV, AVI, DAT, and MXF) and handles all your video resolution conversions (such as 3840x2160 to 1920x1080 and 1920x1080 to 1280x720).

In addition to changing video resolution, it can also change video format, tweak video audio parameters, trim, merge, crop, and subtitle video. Now, let's free download all-in-one WinX HD Video Converter Deluxe to change the resolution of your video file.

Step 1: Load the source video and choose output format

Click the button "+ Video" top on the main interface to load your video and choose an output video format you want. There are 420+ output profiles for you. You select the original format or a different one.

Step 2: Choose desired video resolution

Click the wheel-shaped button and then click the drop-down menu of Resolution to choose a desired video resolution. Available resolutions include 4096x2160, 3840x2160, 2560x1600, 2560x1440, 1920x1200, 1920x1080, 1280x800, 1280x720, 960x640, 720x480, 640x480, 480x320, and 320x240. Or you can click the Customize option to enter a video resolution based on your needs.

Step 3: Start changing video resolution.

Hit the button "RUN" to start to convert and change your video resolution.