Launched this week
Synfren
Multicam audio sync for Mac
3 followers
Multicam audio sync for Mac
3 followers
PluralEyes is gone. Synfren syncs multicam footage on macOS by the sound the cameras already recorded, then writes a timeline for Final Cut Pro, Premiere Pro or DaVinci Resolve. Every clip says whether it was heard, carried by a camera clock, or needs your eyes - so you only check the ones it points at. macOS 14+, Apple silicon. Your video and audio never leave your Mac.
Free Options
Launch Team / Built With
EneyProactive AI for Mac. Free test, 20,000 credits.
Promoted
Hi Product Hunt,
I shoot video for a living, in Malaysia. For years my sync workflow was PluralEyes - drop the cards in, let it line everything up, keep editing. It is not being developed any more, and every few weeks somebody asks the same question I was asking: what do we use now?
So I built it. Synfren listens to the sound every camera and recorder already captured, works out where they overlap, and writes the timeline out - FCPXML for Final Cut Pro, FCP7 XML for Premiere Pro and DaVinci Resolve.
The part I actually care about is not speed. It is knowing what to check.
A tool that places 100 clips and is quietly wrong about 4 of them has saved you nothing, because you still have to scrub all 100 to find the 4. So every clip in Synfren says what its placement is worth:
- heard: measured from the sound itself
- clock-checked: nothing usable to hear, so it was carried by the camera's clock, and that clock was verified against clips that were heard
- needs attention: it would be guessing, so it does not place it
You look at the third pile. And a sync that did not finish cannot be exported as though it had.
How close it gets. My rule: a clip placed from sound lands within 100 ms of where the sound says it belongs, or Synfren does not place it at all. A frame at 25 fps is 40 ms. Measured on one of my own weddings, against an answer worked out independently from the sound alone:
- placed from sound: median 0.3 ms, worst 7.9 ms (about a fifth of a frame)
- carried by a camera clock: good to about a second, and labelled that way
- could not be placed: left for me, never guessed
Your footage stays on your Mac. Working out the offsets happens partly on a server, but what goes there is compact loudness data - never your video, never your audio, never a filename or a folder name - and it is deleted when the job ends.
Where it is today: macOS 14 or later, Apple silicon. Signed and notarised. No Windows yet, no Avid, no Intel build.
Free to try - three exports with every account, and syncing is never counted, because a synced project delivers nothing until you export it. Plans start at $5.
I have exactly one Mac to test on, an M1 Air, so if it breaks on yours I want to hear about it. The app asks after every sync whether it came out right, and that is where the next build comes from.
https://synfren.com
For Product Hunt: the first 20 people to type PRODUCTHUNT at https://synfren.com/redeem get a month of exports, free. It starts when you claim it, not today, and there is no card to add.
Happy to answer anything here, including what it is bad at.
- Martin