Video Format Comparison

MPEG vs MP4 — Legacy Format vs Modern Standard

MPEG (Moving Picture Experts Group) is the standards body and also a family of video formats. The original MPEG-1 (1993) and MPEG-2 (1995, used in DVD, broadcast TV) files have .mpg or .mpeg extensions. MP4 (MPEG-4 Part 14, 2001) is the modern container from the same MPEG standards body, using far more efficient H.264 or H.265 video. Confusingly, MP4 is technically an MPEG format, but colloquially 'MPEG files' refers to older .mpg/.mpeg files using MPEG-1 or MPEG-2 video.

MPEGvsMP4

Quick Verdict

Use MPEG when…

MPEG (MPEG-1/MPEG-2) has no compelling use case for new content. Convert old MPEG files to MP4. DVD-quality MPEG-2 re-encoded to H.264 MP4 results in files 3–5× smaller at the same visual quality.

Use MP4 when…

Use MP4 (H.264 or H.265) for all modern video — smaller files, better compatibility, universally supported on all devices and platforms.

MPEG vs MP4: Feature Comparison

Feature	MPEG	MP4
Video standard	MPEG-1 (1993) or MPEG-2 (1995)	H.264 (2003) or H.265 (2013)
Compression efficiency	Poor by modern standards	Excellent
File size (equal quality)	2–5× larger than H.264 MP4	Baseline
DVD format	MPEG-2 (VOB files on DVD)	Not used on DVD (but replaces for rips)
Broadcast TV	MPEG-2 (over-the-air, cable)	H.264/H.265 (streaming, ATSC 3.0)
Browser HTML5 support	Not supported	Universal
Modern device support	Declining	Universal

When MPEG wins

✓Video standard: MPEG-1 (1993) or MPEG-2 (1995)
✓Compression efficiency: Poor by modern standards
✓File size (equal quality): 2–5× larger than H.264 MP4

When MP4 wins

✓Video standard: H.264 (2003) or H.265 (2013)
✓Compression efficiency: Excellent
✓File size (equal quality): Baseline

Frequently asked questions

How do I convert MPEG to MP4?

FFmpeg: `ffmpeg -i input.mpg -c:v libx264 -crf 20 -c:a aac output.mp4`. HandBrake: open the MPEG file → select H.264 preset → set container to MP4 → Start. VLC: Media → Convert/Save → add MPEG file → choose H.264 + AAC MP4 profile → Start. The resulting MP4 will typically be 50–70% smaller than the MPEG source at similar quality.

Is MPEG-2 the same as DVD?

DVD video uses MPEG-2 video (in VOB container files). The raw MPEG-2 stream and DVD VOB files are related but different formats. A DVD rip typically extracts the MPEG-2 stream and re-encodes it to H.264 in an MKV or MP4 container for efficient storage. Converting a DVD to MP4 reduces file size from ~4–8 GB (DVD) to ~1–2 GB (H.264 MP4) at similar visual quality.

Can VLC play MPEG files?

Yes — VLC plays MPEG-1 and MPEG-2 files (.mpg, .mpeg, .vob) on all platforms. VLC includes its own MPEG-1 and MPEG-2 decoders independent of operating system codecs. Windows 10/11 can also play MPEG-2 files in the Films & TV app if the 'MPEG-2 Video Extension' is installed from the Microsoft Store.