Downmix Surround to Stereo

Drop a video file, pick a surround track, and get the same file back with a stereo fold-down of it added. Only that one new track is encoded — the video, the subtitles and every other stream are copied, never touched — and the result stays in the container it came from. Everything runs in your browser.

Drop a video file here

or click to browse · .mkv, .mov, .mp4, .webm

Surround track to fold down

Options

The surround track it came from

Keep it
The file gets both: the original surround track, copied byte-for-byte, and the new stereo one beside it. Remove it
The stereo downmix replaces it. Other audio tracks are untouched either way.

Encoding the new stereo track

Codec

Bitrate

Verbose log

Initialising…