مونتاج فيديوهاتك داخل ChatGPT: Codex مع plugin الـ Remotion خطوة بخطوةEdit Your Videos Inside ChatGPT: Codex with the Remotion Plugin, Step by Step

Key terms

Codex

The agent inside the ChatGPT desktop app that writes and runs code. It works only inside your project folder.

Remotion

A tool that makes videos with code. Instead of dragging clips by hand, code decides where to cut and where captions go.

Plugin

An add on that gives Codex ready made skills. The Remotion plugin is maintained by Remotion itself.

Transcript

Your speech written out with the timing of every word. It tells the edit where to cut and where captions land.

The steps

1. 1

   Step 1

   Get what you need

   You need the ChatGPT desktop app (Mac or Windows), Node.js installed from nodejs.org, and a few GB of free space.

   The best clip is vertical, one person talking, with clear audio in a quiet room. Cleaner audio means more accurate captions.

   nodejs.org

   

   Tip: Film in a quiet room. Noise breaks the timing more than anything else.

2. 2

   Step 2

   Open Codex in the ChatGPT app

   Open the ChatGPT desktop app and sign in. From the menu at the top, switch from ChatGPT to Codex.

   Codex writes the editing code and runs it on your computer.

3. 3

   Step 3

   Add the Remotion plugin

   In Codex, open the Plugins tab, search for Remotion and add it.

   Remotion maintains this plugin itself, and it bundles Agent Skills that know how to build a video properly.

   remotion.dev

   

   Tip: If it does not show up, check the plugin is enabled and start a new chat.

4. 4

   Step 4

   Create a project folder

   Create an empty folder with a plain name such as reels, and put your clip in it with no spaces in the name, such as clip01.mp4.

   In Codex, create a new project on that folder. Codex then works only on these files.

5. 5

   Step 5

   Call Remotion and write the edit brief

   Start a new chat in the project, type $remotion and pick the plugin when Codex suggests it.

   Then paste the brief below and change the parts in brackets. Keep the last line: it makes Codex stop and show you the transcript before it renders.

   remotion.dev

   

   PromptEdit brief

   Copy

   Edit [clip01.mp4] into a vertical reel for [Instagram Reels]. Transcribe it locally with word level timestamps. Cut pauses longer than 0.6 seconds and standalone filler words, keeping about 120 ms of audio on each side of every cut. Add captions 3 to 4 words at a time in bold white, highlighting the spoken word in [#0071E3]. Pick [five] strong lines at least 10 seconds apart and add a subtle 8% zoom on each. Export 1080 x 1920, 30 fps, H.264 with AAC audio. Before rendering, show me the full transcript and the zoom moments so I can fix them.

6. 6

   Step 6

   Approve only what the project needs

   Codex asks before it installs Remotion or a speech to text tool, extracts audio or renders. That is normal.

   Reject anything that reaches files outside the folder, asks for a password, an API key or a card, or uploads your video anywhere.

7. 7

   Step 7

   Check the transcript before you render

   Speech to text tools get names and English words wrong, and those mistakes end up in your captions.

   Read the whole transcript, send every fix in one message, then ask it to render.

   PromptFix, then render

   Copy

   Fix these words in the transcript: [Claude not Cloud], [Remotion not Promotion]. Keep everything else. Then render the reel and tell me the exact path of the exported file.

8. 8

   Step 8

   Export and save your style

   The video usually lands in an out folder inside the project. One more message gets you a 4:5 version for the feed.

   Once you like the look, have it save your caption, colour and zoom settings as a skill, so your next edit starts close to done.

   PromptSave the style

   Copy

   Save the caption style, colours, zoom rules and export settings from this edit as a reusable skill called [my-reel-style], so my next edit starts from it.

9. 9

   Step 9

   Know the license, and try it in Claude Code

   Remotion is free for individuals and for teams and companies of up to 3 people. With 4 or more people you need a Company License from Remotion.

   The same idea works in Claude Code: Remotion maintains an official plugin for it too, used the same way.

   remotion.dev

   

Ready prompts to copy

Make a second export of the same edit at 1080 x 1350 for the Instagram feed. Keep the captions inside the frame and move them up if they get cut.