Free online MPG to MPEG converter

What the mpg format is

.mpg is a shortened filename extension for video based on Moving Picture Experts Group standards, most often MPEG-1 or MPEG-2. Such files commonly contain MPEG video with MP2 or Layer II audio, although the exact streams depend on the recording or authoring software.

Older camcorders, television capture systems, DVD-authoring applications, video editors, VCD and SVCD tools, and legacy Windows software commonly create MPG files. Archived broadcasts and older camera-card collections also frequently use the extension.

What the mpeg format is

.mpeg normally identifies the same MPEG-1 or MPEG-2 video family as .mpg. The longer extension does not automatically mean higher quality, a different codec, or a different container; it is mainly a filename convention that some applications or devices require.

MPEG-1 and MPEG-2 remain useful for legacy playback, DVD-compatible workflows, broadcast archives, and older editing systems. They require more storage than newer codecs such as H.264 or H.265, so changing .mpg to .mpeg does not reduce the file size.

How to perform the conversion

First determine whether the receiving software requires only the extension:

1. Keep a backup of the original file.
2. Rename video.mpg to video.mpeg. In Windows, enable File Explorer → View → Show → File name extensions first, or the result may become video.mpeg.mpg.
3. Open the renamed file in the target application. If it imports and plays correctly, no video or audio data was changed.

On macOS or Linux, rename the file in Finder, Files, or a terminal. A filename change is sufficient when the file already contains streams supported by the target program.

Lossless conversion with ffmpeg

Use FFmpeg when the target application needs a newly muxed MPEG file rather than merely a different filename:

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

-c copy copies the existing audio and video streams without re-encoding, so the operation is fast and preserves their original quality. It can still fail if the streams are not supported by the MPEG output muxer, if timestamps are damaged, or if the destination requires a particular MPEG profile.

Inspect the source before choosing a codec:

ffprobe input.mpg

If the destination specifically requires MPEG-2, transcode the file instead:

ffmpeg -i input.mpg -c:v mpeg2video -q:v 3 -c:a mp2 -b:a 192k output.mpeg

Use the destination's required frame size, frame rate, interlacing mode, audio sampling rate, and bitrate when those specifications are available. A transcode is lossy and can introduce compression artifacts or alter synchronization, aspect ratio, or DVD compatibility.

Conversion without installed software

You can upload the file to 101convert.com, select the MPEG video conversion option, and download the resulting file without installing software. Online processing requires uploading the video, so avoid it for confidential recordings or files subject to storage and upload limits.

Compatibility limitations

Some programs use “MPEG” to mean MPEG-1 or MPEG-2 specifically and reject MPEG-4, H.264, or HEVC streams even when the filename ends in .mpeg. If renaming or stream copying fails, follow the receiving device's codec, container, frame-rate, resolution, audio, and bitrate requirements instead of relying on the extension alone.

Renaming changes no media data, and stream copying changes no encoded samples. Only a genuine transcode changes compression, so it cannot improve the source image and may reduce quality.