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Synfren
Multicam audio sync for Mac
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.
About Synfren on Product Hunt
“Multicam audio sync for Mac”
Synfren was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #140 on the daily leaderboard. 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.
On the analytics side, Synfren competes within Mac, Photo & Video and Video — topics that collectively have 107.8k followers on Product Hunt. The dashboard above tracks how Synfren performed against the three products that launched closest to it on the same day.
Who hunted Synfren?
Synfren was hunted by Martin Kang. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Synfren including community comment highlights and product details, visit the product overview.
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