name	chatgpt-image-short-video
description	Method for producing short vertical videos from ChatGPT image generation through a fixed browser tab, local TTS narration, timed subtitle burn-in, cover exports, and a manifest. Use when an operator needs a reproducible image-to-short workflow with pinned session consistency, per-beat visual prompts, 1080x1920 safe-area rules, local ffmpeg/PIL assembly, and private access kept outside the skill.
version	0.1
license	MIT
metadata	{"category":"plain","tag":["short-video","image-generation","subtitles","media-pipeline"]}

ChatGPT Image Short Video

Use this method to turn a script or content plan into a vertical short video whose primary visual is generated in ChatGPT through an operator-provided fixed browser tab, then assembled locally with narration, burned subtitles, platform covers, and a manifest.

For the full production checklist, prompt pattern, timing rules, render rules, cover contract, and manifest schema, read references/workflow.md.

Core Workflow

Confirm inputs: title, subtitle or hook, spoken script, visual style brief, target language, TTS voice/rate, output directory, and platform metadata.
Use the fixed image-generation browser tab supplied by the operator. Do not open a fresh ChatGPT session unless the fixed tab is broken and the operator approves replacement.
Generate one primary image or a small set of beat images using the per-beat prompt pattern in the reference.
Save generated images as local source assets and record the prompt, browser-tab label, image index, timestamp, and any manual retries.
Generate narration locally with TTS and save both media and subtitle sidecar when available.
Measure true audio duration with ffprobe; derive frame count from audio duration, not expected script length.
Align subtitles from TTS sidecar or a local speech-aligner, then split them into readable blocks.
Render 1080x1920 frames with safe title/subtitle placement, light motion, and burned subtitles.
Encode with ffmpeg, mux narration, create 4:3 and 3:4 covers, and write a manifest pointing to every final artifact.
Validate that the video, covers, subtitles, and manifest are public-safe and contain no internal handles, local paths, credentials, browser slugs, or draft labels.

Non-Negotiables

Fixed-tab access is a private operator setting. Never include actual tab URLs, account names, access tokens, local workspace paths, or handles in reusable output.
The fixed tab exists for session continuity and image-tool consistency. It isolates image generation from unrelated conversations and reduces style drift across retries.
Keep the final video at 1080x1920, 24 or 30 fps, H.264, yuv420p, AAC audio, and +faststart unless the target platform requires another contract.
Burn subtitles into the video; do not rely only on external caption files for short-form previews.
Export both horizontal 4:3 and vertical 3:4 covers as separate files.
The manifest must use repo- or package-relative artifact paths when possible. Do not serialize machine-local private paths into a portable manifest.

ChatGPT Image Short Video

For the full production checklist, prompt pattern, timing rules, render rules, cover contract, and manifest schema, read references/workflow.md.

Core Workflow

Confirm inputs: title, subtitle or hook, spoken script, visual style brief, target language, TTS voice/rate, output directory, and platform metadata.

Use the fixed image-generation browser tab supplied by the operator. Do not open a fresh ChatGPT session unless the fixed tab is broken and the operator approves replacement.

Generate one primary image or a small set of beat images using the per-beat prompt pattern in the reference.

Save generated images as local source assets and record the prompt, browser-tab label, image index, timestamp, and any manual retries.

Generate narration locally with TTS and save both media and subtitle sidecar when available.

Measure true audio duration with ffprobe; derive frame count from audio duration, not expected script length.

Align subtitles from TTS sidecar or a local speech-aligner, then split them into readable blocks.

Render 1080x1920 frames with safe title/subtitle placement, light motion, and burned subtitles.

Encode with ffmpeg, mux narration, create 4:3 and 3:4 covers, and write a manifest pointing to every final artifact.

Validate that the video, covers, subtitles, and manifest are public-safe and contain no internal handles, local paths, credentials, browser slugs, or draft labels.

Non-Negotiables

Fixed-tab access is a private operator setting. Never include actual tab URLs, account names, access tokens, local workspace paths, or handles in reusable output.

The fixed tab exists for session continuity and image-tool consistency. It isolates image generation from unrelated conversations and reduces style drift across retries.

Keep the final video at 1080x1920, 24 or 30 fps, H.264, yuv420p, AAC audio, and +faststart unless the target platform requires another contract.

Burn subtitles into the video; do not rely only on external caption files for short-form previews.

Export both horizontal 4:3 and vertical 3:4 covers as separate files.

The manifest must use repo- or package-relative artifact paths when possible. Do not serialize machine-local private paths into a portable manifest.

chatgpt-image-short-video