MPEG / MPG Format: Complete Guide — MPEG-1, MPEG-2 and Conversion

MPEG / MPG Format: Complete Guide

MPEG (.mpeg or .mpg) files represent one of the foundational video technologies of the digital era. Developed by the Moving Picture Experts Group — a joint ISO/IEC working group — the MPEG family of standards powered VCDs, DVDs, digital television, and early internet video. Today, MPEG-1 and MPEG-2 files are legacy formats, but they remain prevalent in archived video, broadcast recordings, DVD rips, and satellite TV capture cards.

The MPEG Family

MPEG is not a single format but a family of standards:

When someone says "an MPEG file", they almost always mean MPEG-1 or MPEG-2 video in a .mpg or .mpeg container.

MPEG-1 vs MPEG-2

Technical Specifications

How to Convert MPEG/MPG to MP4

# MPEG-1 to MP4 (H.264 + AAC)
ffmpeg -i input.mpg -c:v libx264 -preset slow -crf 22 -c:a aac -b:a 192k output.mp4

# MPEG-2 to MP4 (deinterlace + encode)
ffmpeg -i input.mpg -vf yadif=mode=1 -c:v libx264 -crf 22 -c:a aac -b:a 192k output.mp4

# MPEG-2 to MP4 without deinterlacing (if progressive source)
ffmpeg -i input.mpg -c:v libx264 -preset slow -crf 22 -c:a aac output.mp4

# Convert to H.265 for smaller files
ffmpeg -i input.mpg -vf yadif=mode=1 -c:v libx265 -crf 28 -c:a aac output.mp4

# Preserve full quality (for further editing)
ffmpeg -i input.mpg -c:v libx264 -crf 15 -c:a aac -b:a 320k output.mp4

Deinterlacing Explained

MPEG-2 broadcast recordings are often interlaced (each frame is two fields captured at different times). Without deinterlacing, the video will show horizontal "combing" artifacts when displayed on modern progressive displays:

# Deinterlace: yadif (Yet Another DeInterlacing Filter)
-vf yadif           # simple deinterlace
-vf yadif=mode=1    # output one frame per field (doubles frame rate: 25fps → 50fps)
-vf bwdif           # better quality deinterlace (recommended for archiving)

Batch Convert MPEG to MP4

# Linux / macOS
for f in *.mpg *.mpeg; do
  ffmpeg -i "$f" -vf yadif=mode=1 -c:v libx264 -crf 22 -c:a aac "${f%.*}.mp4"
done

Convert VCD (MPEG-1) Files

VCD discs contain MPEG-1 video files in a specific directory structure:

# MPEG files are in MPEGAV/ directory on VCD
# Typically named AVSEQ01.DAT, AVSEQ02.DAT etc.
ffmpeg -i AVSEQ01.DAT -c:v libx264 -crf 22 -c:a aac output.mp4

Common MPEG Problems

MPEG-2 in DVDs and Broadcasting

MPEG-2 is the backbone of the DVD standard (with AC3 audio in VOB containers) and digital broadcasting (DVB-T, DVB-S, ATSC). If you have:

• DVD rips (.vob files): use HandBrake for easy conversion
• Broadcast recordings (.ts files): see the TS format guide
• Satellite captures: often require MPEG-2 decoding; convert with FFmpeg

Related conversions

Common video conversions that pair well with this guide:

• MOV to MP4
• AVI to MP4
• MKV to MP4
• MP4 to WEBM
• MP4 to GIF
• MP4 to MP3