Best Video Size Reducer
Compress Video File Size by up to 90% with No Quality Loss

Video Size Reducer: How to Reduce Video File Size by 90% yet in High Quality
By Cecilia Hwung | Updated: October 10, 2019

It has been a common sense that some websites and social media don't support you to upload videos in big size. Even if you've successful upload large size video to the web, it would consume too much bandwidth when you're watching it, getting your device overheated and slow. For that, you're required to compress video size. Yet, to find an ideal video size reducer is not that easy as expected. Some video size reducer software could not get your desired compression ratio, and some others reduce video size at the expense of video quality. Then, is there a video size reducer could have the best of both worlds: your desired compression ratio and intact output quality? The answer is VideoProc!

Trim a Video on Mac and Windows
Seeking for A Video Size Reducer to Compress Video Sharply but No Loss?
VideoProc Wins the Top Priority!

VideoProc - Compress Video with A Trade-off Between Video Size and Quality

VideoProc absolutely comes to an ideal 4K video compressor software, which calls upon interframe and intraframe coding algorithms, along with advanced entropy coding to compress your video to the hilt and get rid of temporal and spatial redundancies for a more efficient encoding, achieving 90% video size reduction with almost no quality loss.

It allows users to reduce video size in various ways, for example, cutting off unwanted parts to shorten your video length, splitting a large video into segments to adapt to social media's size limits, turning video format to a higher compression efficiency ones, like H.264 to HEVC, downscaling video resolution, lowering video bit rate, frame rate etc. Better yet, VideoProc is also fast. Using the unique level-3 hardware acceleration powered by Intel®, AMD® and NVIDIA® GPUs, together with auto copy feature, you can lower the CPU usage to 40% and compress 4K UHD videos up to 47x real-time faster.

How to Reduce Video File Size without Quality Loss

Given that VideoProc behaves excellent on reducing video file size, you must be curious about how to shrink video with it losslessly. Here is the simple tutorial on how to reduce video size without quality loss.

Step 1: Import your source video.

Free download the video size reducer for Mac or Windows version on PCs, install and launch it. Then click Video icon to enter the video conversion interface. Click + Video button to load your source video.

Import Source Video
Step 2: Apply one or more ways to reduce your video file size, according to your specific needs:

1. Select a higher compression efficiency output format. After your video loaded, click Target Format button to select an output format from the result window. You're highly suggested to choose a format with higher compression efficiency, for example, converting H.264 MP4 to HEVC, or going to YouTube/Facebook/Vimeo Video to choose MP4 for uploading to the web.

Convert H.264 to HEVC

2. Adjust video parameters. Click Codec Option button to get into a window where you can lower frame rate, downscale video resolution such as from 4K UHD to 1080p/720p, reducing video bit rate, change aspect ratio and other more advanced audio/video parameters adjustment.

Tweak Audio Video Parameters

3. Trim the video length. Click the Cut button below the video info. And drag the green knob to cut off the unwanted parts to reduce the video file size.

Cut/Trim Video Clips

4. Split video into segments. Click Toolbox button at the bottom of the panel, and double-click Split button to make a splitting of your video, deciding how many segments you want to split your video or split video at how many seconds.

Split Large Video into Segments

5. Crop the frame size. Click Crop button under the video information. Tick the box of Enable Crop and you can see the original video on the left has a dashed box now. Drag the dotted frame freely to crop the video from left, right, top and bottom, to remove unnecessary borders to get the highlighted area. And you can preview the output effect on the right window.

Crop Video Frame Size
Step 3: Start to reduce video now.

Tap on RUN button, the video file size reduction is in the process. If your computer supports hardware acceleration tech, you'll experience a super fast video compression without visually quality loss.

[Video Compression Test] VideoProc's Performance Over Handbrake

Besides VideoProc, Handbrake is also commonly used to compress video size. To tease out the superiority of VideoProc, we've tested to use it and Handbrake to shrink a large-sized 4K MP4 video shot by GoPro to the same settings.

Parameters Source Video Compressed by VideoProc Compressed by Handbrake
File Size 233MB 3.02MB 25.6MB
Format MPEG-4 MPEG-4 MPEG-4
Duration 30s 763ms 30s 834ms 30s 784ms
Bit Rate 63.6Mb/s 822kb/s 6977kb/s
Resolution 3840 × 2160 pixels 1920 × 1080 pixels 1920 × 1080 pixels
Frame Rate 60 FPS 30 FPS 30 FPS
Display Aspect Ratio 16:9 16:9 16:9

I'm running on my Mid 2011 27-inch iMac with OS X Yosemite, 2.7 GHz Intel Core i5, 8GB 1333 MHz DDR3, Graphics AMD Radeon HD6770M 512 MB.

Apparently, VideoProc gets more video size reduced than Handbrake. And in the same output setting, VideoProc takes 2 minutes 13 seconds to make this 4K UHD video compression done on the iMac (HEVC hardware acceleration is not available on this computer), while Handbrake needs 5 minutes 7 seconds indeed. Both videos look pretty clear, yet the one compressed with VideoProc almost gets 10 times smaller size than Handbrake compressed one. So why not choose VideoProc to reduce video file size dramatically without quality loss.

The Logic Behind Decreasing the Size of A Video without Quality Loss

Before to figure out the issue "How can we decrease the video size", we probably need to first make it clear that what determines a video size, then we can know where we will go and what we are going to do.

It is quite simple - the size of a video equals its duration multiplying its bitrate. There are possibly some newcomers who have little knowledge of video elements video bitrate. Video bitrate simply means how many bits one second duration of the video has. In some ways, one second video images have more bits, the size of video would be bigger but the video quality would be higher.

So if we want to decrease the size of a video, we have two ways to make it,

1. Shortening its duration

When we are shooting a video, mostly there must be some redundant shots. So we can remove such unwanted parts, shorten the duration, and make it smaller.

This is just one option, and the other one is breaking up the whole video file into multiple individual parts.

This is kind of silly, some of the friends probably think, since we have not reduced the video size at all by it. While in some situations, it would be the easiest way. For example, when we plan to share our videos on social media, we know that some social media has the limit for video size, and we can just cut them into multiple segments for uploading.

2. Lowering its bitrate

Well, you need to know that here lowering bitrate does not simply mean decrease the bitrate of the video at all, but we suggest every second of the video conveys fewer bits. This is because, if we simply changing the bitrate number of the video smaller, there might occur image quality loss. Sacrificing image quality for smaller video size is definitely not what we want, right?

However, how can we change the bitrate, but not influencing the video quality, or as little as possible, at the same time?

Base on my personal experience and knowledge, still two options are on our list to try, cropping and video codec changing.

If the camera or other devices cover some needless views, when we are shooting a video, we can crop them and reduce the video size. While, if you think each scenery in the image is precious, you need the other option to help you, ie changing the video codec.

Tips: Video bitrate is determined by its resolution, frame rate, and its codec. While, if we change the resolution and frame rate directly, there is no doubt that it must lead to video quality loss. But changing the codec would have less influence on video quality or none at all.

Video codec helps us compress a video efficiently. While there are many types of the codec, MPEG-1, MPEG-2, MPEG-4, H.264, H.265 (HEVC), VP8, VP9, XVID/DIVX, etc. And the compression efficiency of each codec differs. For now, H.265 would be the best. It has up to a 50% better compression ratio than the H.264 codec, which means it can save up to 50% video size compared to H.264.

So if you want to reduce video size by changing the video codec, H.265 would be a good choice. However, you need to know that H.265 has not been as popular as H.264, which means some applications are not compatible with it.

Well, these are pretty much all the methods that we can imagine to help you decrease video file size with much less quality loss.

On top of that, you must also know that in a video file, there are not just the video images, but also include some other types of data, such as the audio codec and audio data, captions, menus, chapters, and so on. Changing them can also help us make the whole video file smaller. However, mostly, they just take up a quite minimal amount of the whole video file, so in this post, we do not take them into consideration and discussion.

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Cecilia Hwung is the marketing manager of Digiarty Software and the editor-in-chief of VideoProc team. She pursues common progress with her team and expects to share more creative content and useful information to readers. She has strong interest in copywriting and rich experience in video editing tips.

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