Comparison Between MPEG-2 and MPEG-4 - All You Need to Know

MPEG-2 and MPEG-4 are designed for different needs. MPEG-2 is still common for DVDs and digital TV. MPEG-4 is newer and are widely used for online video, mobile phones, and modern video files.

So, which one should you use? Is MPEG-4 always better than MPEG-2? What about video quality and file size? In this guide, we'll compare MPEG-2 and MPEG-4 side by side and show you how to convert between them.

Part 1. What Is MPEG-2?

MPEG-2 is a file format developed by Mitsubishi Electric, Sony, and Thomson in 1994. Commercial video DVDs often store their video as MPEG-2. It's also used in digital TV broadcasting, such as ATSC, DVB, and satellite TV. Some Blu-ray discs and older HD camcorders also use MPEG-2.

MPEG-2 was originally designed to compensate for MPEG-1's shortcomings. MPEG-2 files usually have extensions, including MPEG, MPG, M2V, MP2, or sometimes MP3. This format applies lossless compression techniques for multimedia files to reduce their size.

Part 2. What Is MPEG-4?

MPEG-4 is a group of video and audio compression standards developed by the Moving Picture Experts Group in 1998. This format is mainly used to distribute multimedia files on mobile devices and the Internet.

MPEG-4 includes several different video coding standards. For example, MPEG-4 Part 2 is also called MPEG-4 Visual, and MPEG-4 Part 10 is better known as H.264/AVC. These standards use different compression techniques to reduce file size while preserving good visual quality. Apart from 2D, MPEG-4 also supports 3D videos.

Part 3. MPEG-2 vs MPEG-4: What's the Difference?

MPEG-2 and MPEG-4 are both used to compress video, but they are not equally efficient in the same situations. Let's compare them in terms of compression efficiency, file size, video quality, compatibility, and common uses.

Compression Efficiency

H.264/MPEG-4 Part 10 is generally more compression-efficient than MPEG-2. In tests, H.264 can reduce the required bitrate by around 40 to 50% for SD/HD video, and some tests have reported savings of more than 50%.

File Size

MPEG-2 usually needs a higher bitrate to deliver similar visual quality, so MPEG-2 videos are often larger than videos encoded with MPEG-4. Smaller file sizes make MPEG-4 video efficient for streaming, sharing, storage, and mobile devices.

Video Quality

MPEG-2 file format aims to produce lossless quality and is not specially designed for online streaming. So MPEG-2 files always enjoy a higher video and audio quality. Accordingly, they will be larger. But the quality of MPEG-4 files is also quite good, with some inevitable loss of quality for ease of distribution.

Application

Although MPEG-2 is relatively outdated compared to MPEG-4, it's still a good choice for DVDs, digital TV broadcasts, or older video equipment that accepts MPEG-2.

MPEG-4 codecs such as H.264 are a better fit when you want smaller file sizes for online sharing, streaming, mobile playback, or long-term storage. They're also widely supported across modern devices and video platforms.

If you have an MPEG-2 video you want to share online or play on newer devices, converting it to an MP4 with H.264 is usually the more convenient option.

Part 4. MPEG-2 vs MPEG-4: Which One Should You Choose?

Choose MPEG-2 if you:

• are working with a DVD.
• need compatibility with older DVD players or video equipment that requires MPEG-2.

MPEG-4 is better when:

• You want a smaller file in decent quality.
• You plan to upload or share the video online.
• You need to play the video on modern smartphones, computers, or other devices.

Part 5. How to Convert MPEG-2 to MPEG-4

Now that you know the difference, you may want to convert between MPEG-2 and MPEG-4. You can use a desktop video converter for a simple workflow, or FFmpeg if you're comfortable with command lines.

Method 1. AVAide Video Converter

If you prefer a simple way to convert videos, AVAide Video Converter lets you do it without hassle. Using hardware acceleration, it can convert MPEG-2 to MPEG-4, or vice versa, at high speed. It also provides options for adjusting the output format, resolution, and other video settings.

AVAide Video Converter supports MPEG and MP4 conversion and lets you choose the output resolution and other settings. To avoid unnecessary quality loss, choose a suitable bitrate and avoid repeatedly re-encoding the same video.

Here are the detailed steps to convert between MPEG-2 and MPEG-4.

Step 1Download and install AVAide Video Converter on your computer, then open it.

Step 2Choose Converter on the interface, then click Add Files to upload the MPEG files you need to convert, or you can drag files to the central space directly.

If you want to modify your video before starting the conversion, click Edit, Cut, or Enhance Video on the page. These features will help you edit, rotate, crop, trim, split, merge, and enhance your video.

Step 3Click Convert All to to select the format you want to convert to. You can choose the resolution you want in the list.

Step 4After selecting the format, drop the list next to Save to to choose a folder to save your converted files. Then press Convert All to start the process.

Method 2. FFmpeg

If you don't mind working with the command line, FFmpeg is a good free option. It gives you more control and flexibility over the codec, quality, audio settings, and output file.

Step 1Install FFmpeg. If you are on Windows, you can get the package from its official site. For Mac/Linux users, enter the following lines into Terminal to get FFmpeg:

• Mac: brew install ffmpeg
• Linux: sudo apt install ffmpeg

Step 2Open Command Prompt on Windows, or Terminal on Mac/Linux, and navigate to that folder by typing the full path and pressing Enter.

Step 3To convert an MPEG-2 video to H.264 MP4, enter:

ffmpeg -i input.mpg -c:v libx264 -crf 23 -c:a aac -b:a 192k output.mp4

Replace input.mpg with the name of your MPEG-2 video. The output will be saved as output.mp4. If you want higher quality, use a lower CRF value. If you want a smaller file, use a higher CRF value. Finally, press Enter.

Part 6. FAQs about MPEG-2 vs MPEG-4

Is MPEG-2 outdated?

MPEG-2 is older than newer video codecs, but is not completely abandoned. It is still used in DVD-Video and some digital TV applications, and it remains useful when compatibility with older hardware or video formats is important.

Is an MPEG-4 the same as MP4?

No. MPEG-4 is a group of encoding standards, while MP4 is a container. An MP4 container can wrap up video streams encoded with different codecs, such as H.264 or H.265.

What is the difference between MPEG and MP3?

The biggest difference is that MPEG can be used for video and audio files, whereas MP3 is limited to audio files only. MP3 is a version of MPEG that is used exclusively for audio and is known as MPEG-1 Audio Layer 3, which is more commonly used for distributing and compressing audio files. Sometimes one will need to convert MPEG to MP3 in order to avoid incompatibility.

Which MPEG is the best?

The best and most widespread of the current MPEG versions is MPEG-4, which enables the storage of high-quality video and is highly compatible. MPEG-4 files are not too large, and this feature makes it possible to be played and distributed on almost all major platforms. It is also currently one of the most usable of all video formats.

Is it legal to convert a DVD to MPEG-4?

It depends on where you are and what you do with the converted copy. Ripping your home-made DVD is 100% safe, but converting a commercial DVD is complicated. In the U.S., the DMCA prohibits bypassing technological protection of commercial DVDs, although in real life you're unlikely to be prosecuted if you only rip for personal use.

If you're not sure whether your particular DVD conversion is allowed, check the copyright rules in your country.

By Sylvie Hyde on Sep 08, 2026