Open your MPEG or MPG recording in HandBrake and encode a separate MP4 with H.264 video and AAC audio for a conventional sharing copy. Do not just rename the extension. MPEG names a family of media standards, while MP4 names a container, so “MPEG to MPEG4” is ambiguous. For old recordings, inspect picture shape, interlacing and audio synchronization as carefully as the output format.
Work out what “MPEG” means in your file
.mpg and .mpeg are common names for older recordings, often containing MPEG-1 or MPEG-2 video. MPEG-4 can refer to a standard family or a video codec; it is not a precise instruction to create an MP4 container. Read the destination’s requirements and choose the container and codecs explicitly.
For most ordinary delivery tasks in this guide, the desired output is MP4 with H.264 and AAC. See the container and codec explanation if the labels are confusing. Keep the old recording as your master.
Convert in HandBrake on Windows or Mac
- Install HandBrake from its official website. Select Open Source and open the complete MPG/MPEG recording. Inspect the chosen title and duration.
- Choose an MP4 general preset suitable for the source and destination. A 1080p preset does not mean a standard-definition recording should be enlarged to 1080p.
- In Dimensions, inspect cropping and the display aspect ratio. Preserve 4:3 or widescreen presentation as appropriate; use the source picture as your reference.
- Choose H.264 in Video and the correct audio track as AAC in Audio. If the source is interlaced, inspect a moving scene and configure a suitable interlace filter in Filters.
- Save to a new .mp4 filename and start encoding. Open the copy in the destination and compare shape, total length and dialogue synchronization near the end.
The official preset list describes maximum resolution and frame-rate limits. Check them rather than assuming the preset preserves every property.
Avoid common damage to old recordings
| What you see | What to investigate | What not to assume |
|---|---|---|
| Stretched faces | Display aspect ratio and anamorphic source pixels | The stored pixel dimensions are always the intended display shape. |
| Combing on moving edges | Interlacing and field order | MP4 packaging makes every source progressive. |
| Audio slips by the end | Input integrity, source timing and selected frame-rate treatment | Changing the extension repairs timestamps. |
| Large but still blurry output | Source detail and chosen quality | A higher resolution recreates missing detail. |
A remux may place some older codecs in MP4, but that does not guarantee the receiving app can decode them. Encode when the destination needs H.264; see how to choose between rewrap and encode.
If the recording does not open cleanly
Confirm the source is complete and readable, then try a fresh copy from your backup. If the scan shows a shorter duration than expected, do not accept that as a successful conversion. For damaged or discontinuous footage, use an editor or repair workflow suited to the actual source before delivery.
For camera recordings split into AVCHD segments, see MTS to MP4. For recurring large conversions, compare the complete local and online workflow rather than assuming upload is the fastest step.
Common questions
Is MPEG-4 the same thing as MP4?
No. MPEG-4 names standards that include coding and file-format specifications; MP4 is a container. Specify the codec as well as .mp4 when compatibility matters.
Can I turn a 4:3 recording into widescreen?
You can crop, pad or stretch it, but each changes presentation. Preserve the original shape unless you intentionally choose a different framing.
Sources & method
Prepared by Videmovo · October 11, 2026. Researched from the documentation below; these are not hands-on conversion tests. Application support, interfaces and service conditions can change.
- HandBrake: opening, presets, destination and encoding ↗
- HandBrake: official presets and their limits ↗
- Shutter Encoder: functions, outputs and audio settings ↗
- MDN: MPEG, MP4 and media container distinctions ↗