How to convert MPEG4 to MKV
- Add your .MPEG4 file - drop it in the box above or click to browse.
- Convert it to .MKV in a few seconds.
- Download your new .MKV file.
What to expect
- Remuxing with MKVToolNix or
ffmpeg -c copyis lossless - the encoded frames are never decoded or re-compressed. - If a tool refuses the
.mpeg4extension, rename the file to.mp4first; the content is byte-for-byte identical. - HandBrake re-encodes by default; use MKVToolNix or
ffmpegif you only want a container swap.
Frequently asked questions
Is quality lost when converting MPEG4 to MKV?
Not when remuxing. Tools like MKVToolNix and
ffmpeg -c copy copy streams unchanged, so output quality is identical to the source.How long does the conversion take?
A remux is limited by disk speed, not CPU - a 2 GB file typically finishes in under a minute.
Will subtitles and multiple audio tracks be preserved?
Yes - MKV supports unlimited tracks, and MKVToolNix lets you choose exactly which ones to include.
What if the source uses an older codec like DivX?
MKV can hold almost any codec, so MKVToolNix will still remux it; just select the tracks you want to keep.
