Choose a MOV.
A MOV from an iPhone, a Mac or a camera, of any length, up to 10 GB. The page reads which picture and sound it holds and says what it will do with each before you press Convert.
SOLIPSIUM Super resolution audio engine
Free video tool
Convert an iPhone or Mac MOV to MP4 with the picture copied.
Your browser copies the picture of a MOV into an MP4 file, packet for packet, so it stays as it was. Then Solipsium checks its sound for hum, noise and clipping.
Drop your MOV here
It is converted in your browser. The video is not uploaded.
A MOV from an iPhone, a Mac or a camera, up to 10 GB.
Convert your video
Picture
Your MP4
Your first 20 seconds
After signing up, import the video into the editor: it repairs the whole soundtrack and exports the video with its picture kept.
What Solipsium hears
Make a free account to repair the whole soundtrack
Then import the video into the editor. Scans and short repairs are free.
How it works
From a MOV to an MP4.
MOV and MP4 are built on the same file format and hold the same kinds of picture and sound, so converting one to the other is mostly a copy, which your browser can make itself. The check that follows is a browser copy of the scan Solipsium's editor runs.
The picture is copied.
H.264, HEVC, VP9 and AV1 picture moves into the MP4 unchanged, with no new compression. ProRes, which few MP4 players play, is re-encoded as H.264 when your browser can decode it.
The sound is copied or converted.
AAC, Opus, MP3, FLAC, AC-3, E-AC-3 and DTS sound is copied as it is. PCM and any other sound this browser can decode is converted.
See what the sound needs.
The quick check listens to the first five minutes for clipping, dropouts, hum, background noise and muffled sound. You can then hear its first 20 seconds repaired, with no account. Solipsium's free try is built for speech.
Questions
Before you convert a MOV.
Is my video uploaded?
No. Your browser reads the MOV and writes the MP4 on your device. Only if you press Repair the first 20 seconds does any sound go to Solipsium, never the picture, and Solipsium keeps only its first 20 seconds and deletes them within an hour.
Does converting lose quality?
Not when the picture is copied: the MP4 holds the same packets the MOV held. A re-encode as H.264, for ProRes or when you choose it for HEVC, compresses the picture again and loses a little detail. Converting does not clean the sound.
Why will the MP4 not play on an older TV or player?
Most likely its picture is HEVC, which many phones record and some older players and TVs cannot play. Choose Re-encode as H.264 before you convert. A re-encode here takes video up to 1920 x 1080, 60 frames a second and 30 minutes, in ordinary 8-bit colour; for anything else the page copies the picture and says why.
What about ProRes or Motion JPEG?
Few MP4 players play ProRes, so the page re-encodes it as H.264, within the limits above. When your browser cannot decode it, the page says so and converts nothing. Motion JPEG from an older camera, and any other picture this page cannot read, is refused the same way.
What happens to PCM sound from a camera?
PCM, the uncompressed sound many cameras record, is converted to AAC, the sound MP4 players expect, or to Opus where your browser has no AAC encoder. A sound your browser cannot decode is left out, and the page says so before you convert. Only the first sound track is kept.
Is a sideways phone video kept upright?
Yes. A phone stores which way up a video goes as a setting in the file, and a copied picture keeps that setting.
Make an old recording easier to hear.
Solipsium works on voicemails, voice memos, answering machine tapes and camcorder audio.
Try it on a recording
The check and the 20-second try need no account.