Media Generation Skill

Media Generation Expert Knowledge

Tool Reference

image_generate

Generate images from text prompts via OpenAI or MiniMax.

Parameters:

Provider-specific notes:

• OpenAI gpt-image-1: Best for photorealistic and creative images. Supports inpainting hints in prompt. Sizes: 1024x1024, 1792x1024, 1024x1792.
• OpenAI dall-e-3: Good quality, may revise your prompt (check revised_prompt in response). Only generates 1 image per call.
• MiniMax image-01: Fast generation, good for illustrations and concept art. Supports arbitrary aspect ratios.

Result: Returns images array with url fields pointing to /api/uploads/{id}.

text_to_speech

Convert text to spoken audio.

Parameters:

OpenAI voices:

MiniMax voices:

Tips:

• For long content, split at paragraph boundaries to keep natural pacing
• tts-1-hd is higher quality but slower; use tts-1 for drafts
• Speed 0.8-0.9 works well for narration; 1.1-1.2 for summaries

Result: Returns url to the audio file, format, duration_ms, sample_rate.

video_generate

Submit an asynchronous video generation task. Video generation takes 1-3 minutes.

Parameters:

Prompt writing for video:

• Be specific about the scene, subject, and action
• Describe camera movement explicitly: "slow pan left", "zoom in", "static shot"
• Keep it focused — one scene per generation works best
• Include lighting and atmosphere: "golden hour lighting", "neon-lit street at night"
• Avoid complex multi-character interactions (current models handle single subjects best)

Good prompts:

• "A golden retriever running through a wheat field at sunset, slow motion, cinematic"
• "Close-up of coffee being poured into a ceramic cup, steam rising, warm morning light"
• "Aerial drone shot flying over a tropical coastline, turquoise water, white sand beach"

Bad prompts:

• "A video" (too vague)
• "Two people having a conversation at a cafe while a dog runs by and a car crashes outside" (too complex)

Result: Returns task_id and provider. You MUST poll with video_status.

video_status

Poll the status of a video generation task.

Parameters:

Statuses:

Polling pattern:

1. Call video_generate → get task_id
2. Wait 10 seconds
3. Call video_status with task_id + provider
4. If not completed, wait 15-20 seconds and poll again
5. Maximum ~10 polls (about 3 minutes total)
6. Always inform the user of current status

Result (completed): Returns file_url, width, height, duration_secs, provider, model.

music_generate

Generate music from a text prompt and/or lyrics.

Parameters:

*At least one of prompt or lyrics is required.

Prompt writing for music:

For instrumentals, describe:

• Genre: electronic, jazz, classical, hip-hop, rock, ambient, lo-fi
• Tempo: slow (60-80 BPM), medium (100-120 BPM), fast (130-160 BPM)
• Mood: uplifting, melancholic, energetic, relaxing, dramatic, mysterious
• Instruments: piano, synth, acoustic guitar, strings, drums, bass

For songs with vocals, provide lyrics with structure markers:

[Verse 1]
Walking down the empty street
Moonlight dancing at my feet

[Chorus]
This is where the night begins
Let the music pull us in

[Verse 2]
...

Good prompts:

• prompt: "Chill lo-fi hip-hop beat, vinyl crackle, mellow piano chords, 85 BPM, rainy day vibe"
• prompt: "Epic orchestral trailer music, building tension, brass and strings, 140 BPM"
• prompt + lyrics: "Indie folk acoustic ballad, fingerpicking guitar, gentle male vocals" with lyrics

Result: Returns url to audio file, format, duration_ms, sample_rate.

Combined Workflow Recipes

Podcast Intro

1. music_generate — instrumental jingle, 10-15 seconds, upbeat
2. text_to_speech — "Welcome to [show name]..." with energetic voice
3. Report both URLs to user

Social Media Post

1. image_generate — eye-catching visual for the post
2. Suggest caption text based on the image
3. Optionally text_to_speech for accessibility audio version

Video with Narration

1. text_to_speech — generate narration audio
2. video_generate — generate matching video clip
3. video_status — poll until complete
4. Report both URLs (user can combine with ffmpeg or editing tools)

Album Art + Preview

1. image_generate — album cover artwork
2. music_generate — short preview track matching the artwork mood
3. Present together

Audiobook Chapter

1. Split text into sections (~500 words each)
2. text_to_speech for each section with consistent voice
3. Report all audio URLs in order

Error Handling

Provider Capability Matrix

Auto-detection priority: OpenAI > MiniMax (for capabilities both support). If only MiniMax key is set, all 4 modalities are available through MiniMax.