andrewarrow

cutlass

Go2025–2025

andrewarrow / cutlass

cutlass

swiss army knife for generating fcpxml files

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2Distinct people

6Mentions

0Explicit recommenders

58GitHub stars

REPOSITORY AT A GLANCE

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What it is

swiss army knife for generating fcpxml files

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

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Also in these discussions

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This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:03:16 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by week6 dated mentions

Observed mentions: 2025-06-08 21:30:35 UTC to 2025-08-16 16:07:59 UTC. Weeks start Monday, UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges

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Period	Start (UTC)	End (exclusive, UTC)	Mentions	Submissions	Comments
Jun 2	2025-06-02 00:00:00 UTC	2025-06-09 00:00:00 UTC	1	1	0
Jun 9	2025-06-09 00:00:00 UTC	2025-06-16 00:00:00 UTC	1	1	0
Jun 16	2025-06-16 00:00:00 UTC	2025-06-23 00:00:00 UTC	1	1	0
Jun 23	2025-06-23 00:00:00 UTC	2025-06-30 00:00:00 UTC	2	1	1
Jun 30	2025-06-30 00:00:00 UTC	2025-07-07 00:00:00 UTC	0	0	0
Jul 7	2025-07-07 00:00:00 UTC	2025-07-14 00:00:00 UTC	0	0	0
Jul 14	2025-07-14 00:00:00 UTC	2025-07-21 00:00:00 UTC	0	0	0
Jul 21	2025-07-21 00:00:00 UTC	2025-07-28 00:00:00 UTC	0	0	0
Jul 28	2025-07-28 00:00:00 UTC	2025-08-04 00:00:00 UTC	0	0	0
Aug 4	2025-08-04 00:00:00 UTC	2025-08-11 00:00:00 UTC	0	0	0
Aug 11	2025-08-11 00:00:00 UTC	2025-08-18 00:00:00 UTC	1	0	1

What Hacker News says

6 sources

fcpguru·Aug 16, 2025

i stopped working on https://github.com/andrewarrow/cutlass it was a way to generate FCP (Final Cut Pro) xml files. Was a lot of fun for a few months but that's kinda typical for me. I seem to always move on.

In Ask HN: What are you *not* working on?

fcpguru·Jun 29, 2025

Oh I have just the wiki for you! https://github.com/andrewarrow/cutlass/wiki The format is soooo complex. But if you want every feature of FCP it's all there.

In Show HN: A different kind of AI Video generation

fcpguru·Jun 26, 2025Submission

Show HN: A different kind of AI Video generation

Hello! I'm Andrew Arrow, a developer and Final Cut Pro user. My history with FCP goes back years and years, I tried to be a video editor as a career but ended up a software developer. I purchased the full version of the software a long, long time ago. And to Apple's credit, every single time I goto the App Store on any mac I still have access to download it. I must have been through 20, 30? I don't know, but a lot of macs over the years. Just recently I downloaded it again and noticed the XML Export feature. Wow. There's a lot of stuff there. I mean a lot. I started playing around with generating the XML and that has lead to this project. https://github.com/andrewarrow/cutlass/blob/main/README.md Read through those go structs and xml tags. Keep going. And going. It just never stops! It's a very sophisticated XML format that can describe a

Read the rest

ny timeline, effect, or animation you can imagine. Apple's documentation is scattered, the XML is notoriously finicky, and one wrong attribute crashes your import. And of course with Claude Code (or others, pick your favorite AI) you can have your AI write some amazing things in go using cutlass. ```go // Generate a timeline with precise keyframe animations video := fcp.Video{ Ref: assetID, Offset: "0s", Duration: fcp.ConvertSecondsToFCPDuration(10.0), AdjustTransform: &fcp.AdjustTransform{ Params: []fcp.Param{{ Name: "position", KeyframeAnimation: &fcp.KeyframeAnimation{ Keyframes: []fcp.Keyframe{ {Time: "0s", Value: "0 0"}, {Time: "240240/24000s", Value: "100 50"}, }, }, }}, }, } ``` So I haven't been writing code like that with my human brain. I spend most of my time just telling Claude the video I want to create, and he uses the cutlass library to achieve it. I'm hooking up FCP directly to Claude. A different kind of AI Video generation. Would love feedback, thanks for reading this far! -aa

45 points · Open discussion

andrewfromx·Jun 18, 2025Submission

Show HN: Easy picture in picture final cut pro automation

Take this hammerspoon lua script: https://github.com/andrewarrow/cutlass/blob/main/scripts/ham... And you can now press one buttons to start a movie recording and a screen recording at the same time. After you have talked and demo'd your screen save the files and run: ./cutlass fcp add-video ~/Documents/test1.mov -o demo.fcpxml ./cutlass fcp add-pip-video ~/Desktop/test1.mov --input demo.fcpxml -o demo.fcpxml And it will make you a final cut pro xml file you can import to FCP and have a video like: https://www.youtube.com/watch?v=dxQkM0Sszeo

2 points · Open discussion

andrewfromx·Jun 13, 2025Submission

Show HN: Automate final cut pro's XML language

Did you know the final cut pro xml import export is very powerful? Have you ever opened one of those xml files? https://github.com/andrewarrow/cutlass/blob/main/reference/p... That's a simple plus sign drawn with fcpxml shape language. But there's more! Way more: https://github.com/andrewarrow/cutlass/blob/main/FCPXMLv1_13... Almost 1000 line DTD file, you can do A LOT. And that's what "cutlass" aims to do. Open source golang project to let you slice, dice, and julienne fcpxml. Once you have code that can generate fcpxml you can do stuff like: https://www.youtube.com/watch?v=nGsnoAiVWvc This is all the top HN stories titles read by AI with screenshots and animations. (used https://github.com/resemble-ai/chatterbox and https://github.com/nari-labs/dia for voices) Do you have an idea for a video we could make using the power of cutlass? L

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et me know!

3 points · Open discussion

andrewfromx·Jun 8, 2025Submission

Swiff army knife for generating fcpxml (final cut pro) files

1 points · Open discussion