Video made in code, watched by the assistant that made it
PostLumina is a desktop app that gives your Claude Code or Codex a way to watch the video its code rendered, hear what is said in it, check it for where it is going, and write the versions each platform needs. It runs on your machine.
Download for MacSee what the assistant gets
Free for 14 days, no cardApple silicon, macOS 13 or laterWindows coming soon
Your assistant renders the film, then watches it
What PostLumina sends back: frames with their timecodes, then a closer look
An example. The film and its file names are made up.
What your assistant gets from PostLumina
Each line is something the assistant asks for, and what comes back.
- Watch the film
- Frames as images with their timecodes: one contact sheet of the whole film first, then a closer look at any part in doubt.
- Hear what is said
- A transcript of the speech, with times, made on your machine, once you let the assistant hear in Settings. A film with no speech has no transcript.
- Measure it
- Numbers instead of guesses: loudness, silences, shot changes, black bars, streams and codecs.
- Check it for where it is going
- One pass over the file finds black or frozen picture, stray one- or two-frame shots, repeated or dropped frames, flashing risk, clipping and dropouts, and judges loudness, format and size for YouTube, Shorts, TikTok, Reels, a podcast, a master or TV.
- Fix what can be fixed
- After you say yes: loudness and true peak, the format the platform wants, HDR to SDR. The fixed copy goes to its own folder and is checked again. The rest comes back as a list with times.
- Make the versions
- One job per output, each written as a new file in a PostLumina Output folder.
- Record its own render
- Work the assistant did with another tool appears in Jobs marked Done outside PostLumina, next to the jobs PostLumina ran.
Who does what
PostLumina does not generate pictures and does not write the code. It is how the assistant sees, hears and delivers what its code made.
You
In the assistant you already use
- Say what film you want
- Say yes before a file is fixed
- Judge a film that has already been watched
Your assistant
Claude Code or Codex, on your own account
- Writes the code and renders the file
- Calls PostLumina to watch, hear and check it
- Changes the code and renders again
PostLumina
On your machine
- Returns frames, a transcript and measurements
- Checks the file for where it is going
- Fixes loudness and format, and writes the versions
Questions
No. Your assistant's code renders the video. PostLumina does not generate pictures and does not write the code. It lets the assistant watch the file, hear what is said in it, measure it, check it for where it is going, and write the versions each platform needs.
PostLumina samples frames from the file and returns them to the assistant as images with their timecodes: one contact sheet of the whole film first, then a closer look at any part in doubt. Once you let the assistant hear in Settings, it can also return a transcript of the speech. Sampling and speech-to-text run on your machine. The assistant sees the sampled frames and the transcript through your own Claude Code or Codex account.
Install PostLumina, sign in, and click Connect once. That adds PostLumina to your own Claude Code or Codex. From then on you ask in the assistant; PostLumina has no chat box of its own.
PostLumina works with any rendering library or tool your assistant can run, as long as it writes a video file such as an MP4 or a MOV. PostLumina works on the finished file where it is, so the file needs to be in an ordinary folder, not a hidden one.
No. In one pass over the file it finds damaged or cut-off files, black or frozen picture, stray one- or two-frame shots, repeated or dropped frames, flashing risk, clipping, dropouts, and silent or out-of-phase channels, and it judges loudness, format and size for where the film is going: YouTube, Shorts, TikTok, Reels, a podcast, a master or TV. A layout fault, such as a title running off the frame, is not something the check finds. The assistant has to see it in the frames, with a closer look at that moment.
After you say yes, PostLumina fixes loudness and true peak, the format the platform wants, HDR to SDR, interlacing and black bars inside the picture. The fixed copy goes to its own folder and is checked again. Black or frozen picture, bad frames, clipping and flashing come back as a list with times. A film made in code can be changed in the code and rendered again.
PostLumina does not include or sell AI usage. The frames it returns are images your assistant reads, so they count toward your own Claude Code or Codex usage. A contact sheet of the whole film is a single image; a closer look returns more.
PostLumina is free for 14 days with every feature and no card, then USD 19 a month or USD 149 a year. You need your own Claude Code or Codex account and a Mac with Apple silicon and macOS 13 or later. Windows is coming soon.
Let your assistant watch it first
It works from your own Claude Code or Codex, on your own machine. Connect it once, then ask for a film.
Download for Mac
Free for 14 days, no cardAbout 0.5 GB, nothing else to installWindows coming soon