Does converting MPEG to MKV lose quality?

No — if you use the remux method (copy codecs), quality is identical to the original. Quality loss only occurs if you re-encode the video stream with a different codec.

Do I need to install anything?

Yes. FFmpeg is a free, open-source tool available for Windows, macOS, and Linux. Download it from ffmpeg.org and add it to your system PATH.

How long does conversion take?

A remux (stream copy) is nearly instant — often faster than real-time. Re-encoding with H.265 can take 1–5x the video duration depending on your CPU or GPU.

What is the difference between MPEG and MKV?

MPEG is a 1990s format family (.mpg/.mpeg) with limited track and metadata support. MKV is a 2002 open standard supporting unlimited tracks, subtitles, chapters, attachments, and all modern codecs.

Will audio be preserved during conversion?

Yes. With stream copy (-c copy), all audio tracks are preserved exactly. You can also choose to re-encode audio to AAC, FLAC, or MP3 in the command builder.

Can I batch convert multiple MPEG files?

Yes. On Linux/macOS: for f in *.mpg; do ffmpeg -i "$f" -c copy "${f%.mpg}.mkv"; done. On Windows CMD: for %f in (*.mpg) do ffmpeg -i "%f" -c copy "%~nf.mkv"

MPEG to MKV Converter

Name: MPEG to MKV Converter
Availability: InStock
Author: Nham Vu

Learn how to convert MPEG video files to MKV format using FFmpeg commands, with a format comparison table and interactive command builder.

FFmpeg Command Builder

Fill in the fields and get a ready-to-run FFmpeg command.

Input filename

Output filename

Conversion mode

Audio handling

Generated Command

ffmpeg -i video.mpg -c copy video.mkv

Remuxes the MPEG container into MKV without re-encoding. All streams are copied as-is — lossless and very fast.

MPEG vs MKV — Format Comparison

Feature	MPEG	MKV
Released	1991 (MPEG consortium)	2002 (Open source)
File extensions	.mpg, .mpeg, .m1v, .m2v	.mkv, .mk3d, .mka
Audio tracks	Limited	Unlimited
Subtitle tracks	Very limited	Unlimited
Chapter support	No	Yes
Codec support	MPEG-1, MPEG-2 video	All codecs (H.264, H.265, AV1...)
Open standard	Partially (ISO standard)	Yes (Matroska)
HDR / metadata	No	Yes

Quick FFmpeg Reference

Remux (lossless, fastest)

ffmpeg -i input.mpg -c copy output.mkv

Re-encode to H.264 + AAC

ffmpeg -i input.mpg -c:v libx264 -crf 23 -c:a aac output.mkv

Re-encode to H.265 + AAC

ffmpeg -i input.mpg -c:v libx265 -crf 28 -c:a aac output.mkv

Add external subtitle file

ffmpeg -i input.mpg -i subs.srt -c copy -c:s srt output.mkv

Batch convert (Linux/macOS)

for f in *.mpg; do ffmpeg -i "$f" -c copy "${f%.mpg}.mkv"; done

Copied!

Summary

Learn how to convert MPEG video files to MKV format using FFmpeg commands, with a format comparison table and interactive command builder.

How it works

MPEG files (.mpg, .mpeg) store video and audio streams inside a Program Stream or Transport Stream container with limited metadata support.
MKV is a flexible container that can hold the same streams without altering codec data — a process called remuxing.
FFmpeg reads the MPEG container, extracts the raw streams, and places them into an MKV wrapper with no quality loss.
Use the command builder below to generate an FFmpeg command tailored to your conversion goal.
Run the resulting command in your terminal; a remux typically completes in seconds.

Use cases

Remux MPEG files to MKV to add subtitle tracks or multiple audio streams.
Improve compatibility with modern media players that handle MKV better than MPEG.
Preserve original video quality by avoiding re-encoding during the container switch.
Add chapter markers or metadata not supported in the MPEG format.
Reduce file size by re-encoding to H.265/HEVC inside an MKV container.
Archive legacy video collections in a future-proof open-standard format.
Enable hardware-accelerated playback on devices that support MKV but not MPEG.
Batch-convert an entire MPEG library to MKV with a single FFmpeg command.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu