YouTube Thumbnail generator

🎬 Create cinematic YouTube thumbnails from any image — screenshot or photo.
Change genre, background and even facial expression while keeping the character consistent.

Don't judge me too harshly, this is my first experience in creating a node.

🎬 YouTube Thumbnail Studio

Cinematic prompt generator for image editing models

(Optimized for Qwen-Image-Edit, Flux.2 Klein )

🧠 What this node does

YouTube Thumbnail Studio generates precise, structured prompts for image-editing models, focused on:

🎭 controlled facial emotion changes

🎬 cinematic backgrounds by genre

🧍 character consistency (identity, pose, scale)

🎲 reproducible or random results via seed control

Designed and tuned primarily for Qwen-Image-Edit, possibly works with Flux Kontext.

Version 2, adapted for Flux.2 Klein 9B distilled, works much faster than Qwen Image Edit.

🎛️ Input Parameters

🎞️ genre

Select the cinematic genre of the scene (14+1)

Defines the overall visual language and background style.

Examples:

Action film

Adventure film

Horror film

Sci-Fi film

Retro Sci-Fi

Western

Musical

Claymation

➡ Used to select a curated cinematic background description.

🎭 emotion (30 pieces, but not all work perfectly.)

Facial expression to apply to the character

Controls the emotional state of the main subject’s face

(e.g. eyes, mouth tension, brows, micro-expressions).

Examples:

😊 happy

😠 angry

😬 awkward

😖 nervous

😈 playful mischief

➡ Emotion descriptions are internally expanded for better model understanding.

🎭 emotion_only

Emotion-only edit mode (advanced)

🔹 When enabled:

Only the facial expression is changed

Everything else is preserved as strictly as possible:

identity

pose

clothing

lighting

background

composition

Use this when you want a clean emotion swap without scene changes.

🧍 keep_character

Preserve character identity and pose

When enabled:

Keeps face, body, pose, scale, and clothing consistent

Allows background and lighting to change

Emotion change is subtle and controlled

Best for:

thumbnails

posters

character-centric edits

📝 include_text_elements

Add cinematic text elements

Adds:

a short movie-style title

optional tagline

small credit line

Use this for:

YouTube thumbnails

poster-style visuals

🎬 Background Control

🎞️ background_variant

Choose a specific background variant

random → random background from selected genre

0–29 → exact background index

Useful when:

you want consistency

you found a variant you like

🔒 lock_background

Lock the background between generations

When enabled:

The same background is reused

Emotion, seed, or other parameters can change

Great for:

A/B testing expressions

emotion comparisons

🔁 reroll_background

Force background reroll

Overrides background locking and forces a new selection.

🎲 Seed Control

🎲 seed_mode

Random or fixed seed

random → new result every run

fixed → reproducible output

🧬 fixed_seed

Manual seed value

Used only when seed_mode = fixed.

Range: 0 – 999999

✏️ Optional Overrides

🎨 custom_background_elements

Manual background description

Overrides genre background completely.

Example:

abandoned space station corridor with flickering red lights

📝 custom_title

Custom title text

Replaces auto-generated cinematic title.

📝 About Text & Titles (Important Limitation)

Qwen Image Edit (including 2511) is capable of understanding and generating text inside images, and in many cases it places titles or words correctly.

However, please note:

❌ Precise font selection is not supported

❌ Exact text positioning cannot be controlled

❌ Typography styles (kerning, line breaks, alignment) are not editable

❌ Consistent branding text is not reliable

This is a model limitation, not a node limitation.

🧠 extra_instruction

Additional prompt instructions

Appended at the end of the generated prompt.

Installation, Copy the file into: ComfyUI/custom_nodes/

The archive contains a node and a simple workflow.

Don't judge me too harshly, this is my first experience in creating a node.

☕ This node was fueled by coffee.

You can help refill it 🙂 buymeacoffee.com/Krug_Lov