How to Compress Video?

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How to Compress Video?

7 July 2020 John Weaver Senior Program Developer

Last update by James Smith at 9 November 2026

Summary
Nowadays, the progressive development of mobile Internet changes our habits of accessing the Internet terminals. When transferring files between different terminals, we always meet with the situations that we shall compress video file size. For example, we need to place a large video into iPhone; we need to post our videos on SNS. How to compress video file size in different scenarios? Get the answers in this essay.

Content.

Part 1: Factors Affecting Video File Size

1. Duration of Video Playback
2. Video Format
3. Resolution
4. Bit Rate and Frame Rate

Part 2: How to Compress Video with Renee Video Editor Pro

1. About Renee Video Editor Pro
2. Cut to Compress Video
3. Change Resolution to Compress Video

Part 1: Factors Affecting Video File Size

compress video with renee video editor pro

First, we should understand the factors that affect video file size before compressing video with the specific software. Simply, to compress video is to adjust the video duration, bit rate, frame rate, resolution and format.

1. Duration of Video Playback

Basically, the time length is the duration of a video playback. You can cut off the unnecessary part to reduce the file size. It is a way to compress video.

2. Video Format

There are a variety of video formats, such as MP4, MOV, AVI and WMV. Next, we simply introduce their features.

ASF (Advanced Streaming Format) is the compressed format developed by Microsoft who wants to compete with Real Player for the media streaming market. This format is suitable for the online video to be watched in the real time. With the application of MPEG4 compression algorithm, it can contain well video quality with high compression rate.

WMV (Windows Media Video) is the streaming media format introduced by Microsoft. It is the upgrade of ASF. A WMV video is smaller than that of ASF even though they share with the same quality. Therefore, it is suitable for online playback and transmission.

AVI is the abbreviation for Audio Video Interleave. As the name suggests, it can play video and audio simultaneously. Here are its features: it has good compatibility, high image quality, but its file size is large.

MP4 is a set of standards used for audio and video compression, implemented by the Moving Picture Experts Group (MPEG) under the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). MP4 is mainly used for streaming media, optical discs, voice transmission, video telephony and television broadcasting, etc. Since it can use the narrow bandwidth and frame reconstruction to compress and transmit data, MP4 can output the best image quality with the less data.

MOV is the audio and video format developed by Apple. QuickTime is the media player specifically designed for this format. MOV supports 25-bit colors, various video effects and multiple compatible MIDI audios. Due to such well quality, it is generally used in films.

3. Resolution

The video resolution is a parameter used to measure the amount of data in an image. The higher the resolution, the better the video screen. Of course, the file size will be larger. Therefore, you can compress a video by reducing its resolution.

4. Bit Rate and Frame Rate

video output options in renee video editor pro

Bit rate (symbol: bps) is the number of bits that are conveyed or processed per unit of time. The quality will be clearer when it transfer much data in a second. Frame rate (symbol: fps) is the frequency at which the graphics processor display images in a second. If the frame rate is high, the playback will be smooth and clear. However, similar with video resolution, the higher bit rate and frame rate mean the larger video size. You can reduce these two parameters to compress a video. But it is noted that the video screen will be degraded.

After understanding these factors, we recommend you use the Renee Video Editor Pro to compress video.

Part 2: How to Compress Video with Renee Video Editor Pro

1. About Renee Video Editor Pro

Renee Video Editor Pro is the multifunctional software that contains screen recorder and video editor. It not only allows users to record desktop screen, play videos collect audio materials, but also further edit videos, such as adding watermark during recording screen, adding various transitions, filters and subtitles.

Renee Video Editor Pro – Multi-function Video Editing Software

Renee Video Editor Pro professional video edit tools

Screen RecordingRecord screen and webcam in Windows computer.

Cut Videos & AudiosUsers are free to cut videos and audios clips with setting start and end time.

Multiple Edit ToolsMerge, crop, rotate, cut and transform video easily. Change and add background music, subtitles and remove watermark from video.

Format ConversionSupport to convert videos and audios into different formats.

Screen Recording Record screen and webcam in Windows computer.

Multiple Edit ToolsCut Videos & Audios Users are free to cut videos and audios clips with setting start and end time.

Multiple Edit ToolsMerge, crop, rotate, cut and transform video easily. Change and add background music, subtitles and remove watermark from video.

Format ConversionSupport to convert videos and audios into different formats.

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32321 users have downloaded and edited videos with fun!

2. Cut to Compress Video

If your video contains many unnecessary clips, you can cut them off and compress the video file size at the same time. The steps are as follows:

① Download and install Renee Video Editor Pro. Launch the software and select [Video Toolbox].

select video toolbox in Renee Video Editor

② Click on [Add Files] to select the target video.

select the video file in renee video editor pro

③ Enter into the function [Cut].

convert video to mp4 vlc renee video editor pro

④ Drag the sliders to select the wanted clip or set the start and end time to cut. The left part will be smaller than the original video.

⑤ Finally, click [OK] to save the changes. Return to the main interface and select MP4 (smaller file size) as the output format. Click on [Start] to save the video.

select mp4 as the output format and save in renee video editor pro

TipsRenee Video Editor Pro sets many format options for terminal devices, such as iPhone devices, Android devices, etc. You can choose based on your needs.

3. Change Resolution to Compress Video

① Open Renee Video Editor Pro and select [Video Toolbox].

② Click on [Add Files] to select the target video.

③Then, click on [Output Settings] and modify the resolution in the option [Video Size]. In addition, you can change the format in [Output Format] for the smaller video file.

change video size within renee video editor pro

As what we mentioned at the beginning, we can also compress a video by reducing the bit rate and the frame rate. You can check the button [More settings] to extend the menu and adjust these two parameters.