OVI in ComfyUI: Generate Video + Audio Simultaneously with Character AI's New Model

You finally nail the perfect AI-generated video. The motion is smooth, the composition is cinematic, and the lighting looks professional. Then you realize you need to add matching audio, lip-sync dialogue, and sound effects. Hours of manual work ahead, right?

Direct Answer: OVI (Omni Video Intelligence) from Character AI generates synchronized video and audio simultaneously from text prompts in ComfyUI using unified transformer architecture with cross-modal attention. It produces perfect lip-sync without post-processing, requires 12GB VRAM minimum (24GB recommended), and generates 5-10 second clips in 8-20 minutes - 50-75% faster than traditional separate video + audio workflows.

Not anymore. Character AI's OVI (Omni Video Intelligence) model changes everything. This breakthrough technology generates synchronized video and audio simultaneously from a single prompt. You get perfectly matched visuals, dialogue, sound effects, and even accurate lip-sync in one generation pass inside ComfyUI.

Can OVI Really Generate Video and Audio Simultaneously?

What is OVI and Why Does It Matter?

OVI represents a fundamental shift in AI video generation. Released by Character AI in early 2025, it's the first widely accessible model that treats video and audio as inseparable components of the same generation process.

Traditional workflows force you to generate video first, then add audio separately. This creates synchronization headaches, especially for dialogue where lip movements must match speech perfectly. OVI solves this by training on paired video-audio data with deep temporal alignment.

The Technology Behind OVI

OVI uses a unified transformer architecture that processes both visual and audio modalities simultaneously. According to research from Character AI's technical blog, the model employs cross-modal attention mechanisms that maintain tight coupling between what's seen and what's heard throughout the generation process.

Think of it like an orchestra conductor who sees both the musical score and the choreography at once. Every visual element influences audio generation and vice versa, creating naturally synchronized output without post-processing alignment.

OVI Model Variants

Character AI released several OVI variants optimized for different use cases.

The Pro model hits the sweet spot for most creators. It handles complex dialogue scenes with multiple speakers while running on high-end consumer GPUs like the RTX 4090.

How OVI Compares to Traditional Video Generation

Before diving into installation, you need to understand where OVI fits in your toolkit compared to existing solutions.

OVI vs Traditional Two-Stage Workflows

The conventional approach separates video and audio generation entirely.

Traditional Workflow Limitations:

• Generate video with Runway, Kling, or Stable Diffusion Video
• Extract frames and analyze mouth movements
• Generate speech with ElevenLabs or similar TTS
• Manually sync audio to video using Wav2Lip or similar tools
• Fix timing mismatches through multiple iterations
• Export and hope everything stays aligned

OVI Advantages:

• Single prompt generates both video and audio
• Perfect lip-sync built into generation process
• Consistent audio ambience matching visual environment
• Natural sound perspective (distance, direction, room tone)
• Dramatic time savings on dialogue-heavy content

Of course, if you want instant results without local infrastructure, Apatero.com provides professional video-audio generation through a simple interface. You get the same synchronized output without managing ComfyUI installations or VRAM constraints.

OVI vs Existing Audio-Aware Video Models

Several models attempted audio-synchronized video before OVI, but with significant limitations.

Stable Video Diffusion with Audio Conditioning:

• Requires pre-existing audio track
• Limited control over audio content
• No native speech synthesis
• Better for music-driven content than dialogue

WAN 2.2 S2V (Speech-to-Video):

• Generates video from speech input
• No control over speech generation itself
• Requires separate TTS pipeline
• Better lip-sync than post-processing but not true co-generation

Learn more about WAN 2.2's capabilities in our complete guide.

OVI's Differentiators:

• Generates both modalities from scratch
• Natural voice synthesis with emotional inflection
• Environment-aware sound design (echoes, ambience, perspective)
• Character voice consistency across generations
• Superior lip-sync accuracy through joint training

The Cost-Benefit Reality

Let's examine the economics over six months of moderate use (50 video-audio clips per month).

Traditional Separate Pipeline:

• Video generation (Runway/Kling): $100-150/month = $600-900 total
• Audio generation (ElevenLabs Pro): $99/month = $594 total
• Lip-sync tools (various): $50/month = $300 total
• Total: $1,494-1,794 for six months

OVI Local Setup:

• RTX 4090 (one-time): $1,599
• Electricity for six months: ~$60
• Total first six months: ~$1,659

Apatero.com:

• Pay-per-generation pricing with no setup or maintenance
• Instant access without hardware investment
• Guaranteed infrastructure performance

For creators producing dialogue-heavy content regularly, OVI's unified approach pays for itself quickly while eliminating workflow complexity. However, platforms like Apatero.com remove technical barriers entirely if you prefer managed services.

Installing OVI in ComfyUI

System Requirements

Minimum Specifications:

• ComfyUI version 0.3.50+
• 12GB VRAM (for OVI-Base with FP16)
• 32GB system RAM
• 60GB free storage for models
• NVIDIA GPU with CUDA 12.0+ support
• Python 3.10 or higher with audio libraries

Recommended Specifications:

• 24GB VRAM for OVI-Pro or OVI-Extended
• 64GB system RAM for faster processing
• NVMe SSD for reduced model loading times
• RTX 4090 or A6000 for optimal performance

Step 1: Install ComfyUI-Audio Extension

OVI requires audio processing capabilities that aren't in vanilla ComfyUI. If you're new to ComfyUI, check out our beginner's guide to ComfyUI workflows first.

1. Open your terminal and navigate to ComfyUI/custom_nodes/
2. Clone the audio extension repository with git clone https://github.com/comfyanonymous/ComfyUI-Audio
3. Navigate into the ComfyUI-Audio directory
4. Install dependencies with pip install -r requirements.txt
5. Restart ComfyUI completely

Verify installation by checking that audio-related nodes appear in the node browser (right-click menu, search "audio").

Step 2: Download OVI Model Files

OVI requires several components placed in specific ComfyUI directories.

Text Encoder (Required for All Models):

• Download google/umt5-xxl from Hugging Face
• Place in ComfyUI/models/text_encoders/

Audio Codec (Required):

• Download encodec_24khz.safetensors from Character AI's model repository
• Place in ComfyUI/models/audio_codecs/

Main OVI Model Files:

For OVI-Base (recommended starting point):

• Download ovi-base-fp16.safetensors from Character AI's Hugging Face
• Place in ComfyUI/models/checkpoints/

For OVI-Pro (best quality-performance balance):

• Download ovi-pro-fp16.safetensors
• Requires 20GB+ VRAM
• Place in ComfyUI/models/checkpoints/

Find official models at Character AI's Hugging Face repository.

Step 3: Verify Directory Structure

Your ComfyUI installation should now have these directories and files:

Main Structure:

• ComfyUI/models/text_encoders/umt5-xxl/
• ComfyUI/models/audio_codecs/encodec_24khz.safetensors
• ComfyUI/models/checkpoints/ovi-pro-fp16.safetensors
• ComfyUI/custom_nodes/ComfyUI-Audio/

The text encoder folder (umt5-xxl) should contain the model files, the audio codec file should be directly in audio_codecs, and your chosen OVI model should be in checkpoints.

Step 4: Load Official OVI Workflow Templates

Character AI provides starter workflows that handle node connections automatically.

1. Download workflow JSON files from Character AI's GitHub examples
2. Launch ComfyUI web interface
3. Drag the workflow JSON file directly into the browser window
4. ComfyUI will automatically load all nodes and connections
5. Verify all nodes show green status (no missing dependencies)

If nodes appear red, double-check that all model files are in the correct directories and restart ComfyUI.

Your First Synchronized Video-Audio Generation

Let's create your first synchronized clip using OVI's text-to-video-audio workflow. This demonstrates the core capability that makes OVI unique.

Basic Text-to-Video-Audio Workflow

1. Load the "OVI Basic T2VA" workflow template
2. Locate the "Text Prompt" node and enter your scene description
3. In the "Audio Prompt" node, describe the sounds and dialogue you want
4. Find the "OVI Sampler" node and configure these settings:
   • Steps: Start with 40 (higher = better quality, longer generation)
   • CFG Scale: 8.0 (controls prompt adherence)
   • Audio CFG: 7.0 (separate control for audio adherence)
   • Seed: -1 for random results
5. Set output parameters in "Video-Audio Output" node (resolution, FPS, audio format)
6. Click "Queue Prompt" to start generation

Your first synchronized clip will take 8-20 minutes depending on hardware and clip duration. This is normal for joint video-audio generation.

Understanding OVI Generation Parameters

Steps (Denoising Iterations): Higher step counts improve both video smoothness and audio clarity. Start with 40 for testing, increase to 60-80 for production outputs. Unlike video-only models, OVI needs slightly higher step counts because it's optimizing two modalities simultaneously.

Video CFG Scale: Controls visual prompt adherence. Range of 7-9 works well for most scenes. Lower values (5-6) allow more creative interpretation. Higher values (10+) force stricter adherence but may reduce natural motion.

Audio CFG Scale: Separate control for audio generation. Keep this slightly lower than video CFG (typically 0.5-1.0 points lower). Too high causes unnatural voice inflections and forced sound effects.

Synchronization Strength: OVI-specific parameter controlling how tightly video and audio couple. Default 1.0 works for most cases. Increase to 1.2-1.5 for dialogue requiring precise lip-sync. Decrease to 0.7-0.9 for ambient scenes where loose coupling is acceptable.

Writing Effective Prompts for OVI

OVI uses separate but related prompts for video and audio, though they can be combined in advanced workflows.

Video Prompt Best Practices:

• Start with character description and action ("young woman speaking enthusiastically...")
• Include camera movement ("slow push-in on face...")
• Specify lighting and environment ("bright studio lighting, modern office background...")
• Mention emotional state ("excited expression, animated gestures...")

Audio Prompt Best Practices:

• Describe voice characteristics ("energetic female voice, clear pronunciation...")
• Include dialogue in quotes ("Hi everyone, welcome back to the channel!")
• Specify environmental sounds ("slight room echo, subtle background music...")
• Mention emotional tone ("enthusiastic delivery with emphasis on 'welcome'...")

Example Combined Prompt:

Video: "Close-up of young woman in her late 20s, speaking directly to camera, bright natural lighting from window, modern home office background, genuine smile, slight head movements while talking"

Audio: "Warm female voice with slight excitement: 'Hey everyone, I've got something amazing to show you today. This is going to change how you think about AI video creation.' Subtle room ambience, professional audio quality"

Your First Generation Results

When generation completes, you'll see two outputs in your ComfyUI output folder.

Video File (MP4):

• Rendered at your specified resolution and FPS
• Includes embedded audio track
• Ready for immediate playback
• Can be extracted separately if needed

Audio File (WAV/FLAC):

• High-quality lossless audio export
• Includes all dialogue and sound effects
• Useful for additional audio editing
• Already synchronized to video timeline

Preview the combined result directly in ComfyUI using the video preview node. Check for lip-sync accuracy, audio quality, and overall coherence.

If you want professional results without technical workflows, remember that Apatero.com delivers synchronized video-audio generation through an intuitive interface. No node graphs or parameter tuning required.

Advanced OVI Workflows and Techniques

Once you understand basic generation, these advanced techniques will dramatically improve your output quality and creative control.

Character Voice Consistency

One of OVI's most powerful features is character voice generation and consistency across multiple clips.

Creating a Character Voice Profile:

1. Load the "OVI Character Voice" workflow template
2. Generate your first clip with detailed voice description
3. Use the "Extract Voice Embedding" node to capture voice characteristics
4. Save the voice embedding as a preset
5. Load this embedding for future generations featuring the same character

This workflow ensures your character sounds identical across an entire series of videos, crucial for storytelling projects and series content.

Voice Profile Management Tips:

• Create descriptive names for voice profiles ("Sarah-Enthusiastic-30s-Female")
• Store embeddings in organized folders by project
• Document the original prompt used to generate each voice
• Test voice consistency every 5-10 generations to catch drift

Multi-Speaker Dialogue Scenes

OVI handles conversations between multiple characters in a single generation.

Conversation Workflow Setup:

1. Load the "OVI Multi-Speaker" workflow template
2. Use speaker tags in your audio prompt: "[Speaker A]: Hello there. [Speaker B]: Hi, how are you?"
3. Provide voice descriptions for each speaker in the character definitions
4. Set "Speaker Separation" parameter to 1.0 or higher for clear distinction
5. Generate and verify each speaker has distinct audio characteristics

Dialogue Prompt Example:

Video: "Two people having a conversation at a coffee shop, medium shot showing both faces, warm afternoon lighting, casual friendly atmosphere"

Audio: "[Speaker A - deep male voice]: Have you tried this new AI video tool? [Speaker B - higher female voice]: Not yet, but I've heard amazing things about it. Tell me more!"

The model generates distinct voices, appropriate facial movements for each speaker, and natural conversational timing including pauses and overlaps.

Environment-Aware Sound Design

OVI generates audio that matches the visual environment automatically, but you can enhance this with specific techniques.

Acoustic Environment Control:

In your audio prompt, specify environmental characteristics:

• "large cathedral with natural reverb"
• "small enclosed car interior, muffled exterior sounds"
• "outdoor park, distant city traffic, bird sounds"
• "recording studio with dead acoustics"

The model adjusts echo, reverb, background ambience, and audio perspective to match the described space. This creates immersive realism that would take hours to achieve with manual sound design.

Emotion and Inflection Control

Control voice emotion and delivery style through detailed audio prompts.

Emotion Keywords That Work:

• Voice tone: "excited", "somber", "anxious", "confident", "playful"
• Delivery style: "fast-paced", "deliberate", "whispering", "shouting"
• Inflection: "rising intonation", "questioning tone", "emphatic delivery"
• Character: "warm and friendly", "professional and formal", "casual and relaxed"

Combine these with specific emphasis markers in your dialogue:

"[Excited, fast-paced]: This is AMAZING! [Pause, more measured]: Let me show you exactly how it works."

Image-to-Video-Audio Workflows

Start from an existing image and generate matching video motion with synchronized audio.

1. Load the "OVI I2VA" (Image-to-Video-Audio) workflow
2. Upload your source image to the "Load Image" node
3. Describe the motion you want in the video prompt
4. Describe dialogue or sounds in the audio prompt
5. OVI generates video that extends your image with matching audio

This workflow excels for animating character portraits, turning photos into talking-head videos, or adding motion and sound to static illustrations.

Use Cases for I2VA:

• Product demonstrations with voiceover narration
• Character portraits that speak dialogue
• Historical photo animations with period-appropriate sound
• Profile pictures converted to video introductions

Optimizing OVI for Different Hardware Configurations

OVI's dual-modality generation is VRAM-intensive. These optimization techniques help you run it on more modest hardware.

FP8 Quantization for OVI

Full precision OVI models require 20GB+ VRAM. FP8 quantization reduces this significantly.

Available OVI Quantizations:

How to Use Quantized OVI Models:

• Download the quantized version from Character AI's model repository
• No special settings needed, works automatically in ComfyUI
• Audio quality degrades slightly less than video quality in quantization
• Lip-sync accuracy remains high even at INT8

Memory Management for Extended Clips

Generating longer clips requires careful memory management.

Chunk-Based Generation: Instead of generating 30 seconds at once, break it into overlapping chunks:

1. Generate seconds 0-10 with your prompt
2. Generate seconds 8-18 using the ending of the first clip as conditioning
3. Generate seconds 16-26 using the ending of the second clip
4. Blend the overlapping sections for smooth transitions

This technique trades generation time for dramatically reduced VRAM requirements.

CPU Offloading: Enable aggressive CPU offloading in ComfyUI settings. OVI's architecture allows offloading the audio generation components to system RAM while keeping video generation on GPU. This reduces VRAM usage by 20-30 percent with minimal speed impact. For more low VRAM strategies, see our guide to running ComfyUI on budget hardware.

Audio-Only Optimization Mode

For projects where you need high-quality audio but can accept lower video resolution, use OVI's audio-priority mode.

1. Set video resolution to 512p or 640p
2. Enable "Audio Priority" in OVI sampler settings
3. Increase audio sample rate to maximum (48kHz)
4. Model allocates more compute to audio quality

Generate at low resolution for testing, then upscale the video separately using traditional upscaling tools while keeping the high-quality audio. This produces better results than generating at high resolution with compromised audio.

If optimization still feels like too much hassle, consider that Apatero.com manages all infrastructure automatically. You get maximum quality without worrying about VRAM, quantization, or memory management.

Real-World OVI Use Cases and Production Workflows

OVI's synchronized video-audio generation unlocks entirely new workflows across multiple industries.

Content Creation and Social Media

Talking-Head Video Production: Generate entire series of educational or commentary videos without recording equipment. Provide scripts, describe the character, and OVI generates synchronized video with natural delivery.

Perfect for YouTube educational content, tutorial series, or social media explainer videos. Combine OVI with traditional screen recording for complete tutorials.

Podcast Video Versions: Convert audio podcasts to video formats required by platforms like YouTube and Spotify. Feed existing podcast audio to OVI's audio-to-video mode, which generates matching visual content including lip-synced talking heads.

Game Development and Animation

Character Dialogue Pre-visualization: Test different dialogue options during game development without hiring voice actors for every iteration. Generate character speech with matching animations, then refine scripts based on results before final recording.

Cutscene Prototyping: Block out entire cutscene sequences with OVI-generated dialogue and motion. Directors can review pacing, timing, and emotional delivery before committing to expensive motion capture sessions.

E-Learning and Training

Instructional Video Creation: Generate consistent instructor characters that deliver course content with proper emphasis and clear pronunciation. Create entire course libraries with unified visual style and voice characteristics.

Language Learning Content: Produce pronunciation examples with visible lip movements across dozens of languages. Students can see and hear correct pronunciation simultaneously, improving learning outcomes. For even more advanced character animation with pose control, explore WAN 2.2 Animate.

Marketing and Advertising

Product Demonstration Videos: Quickly generate multiple versions of product explainer videos with different voiceover styles, pacing, and emphasis. A/B test which version performs best before investing in professional production.

Localized Content: Generate the same video with dialogue in multiple languages, each with appropriate lip-sync. This eliminates expensive dubbing or subtitle-only solutions.

Troubleshooting Common OVI Issues

Even with correct installation, you may encounter specific issues. Here are proven solutions.

Audio-Video Desynchronization

Symptoms: Lip movements don't match speech timing, or sound effects occur before/after corresponding visual events.

Solutions:

1. Increase "Synchronization Strength" parameter to 1.3-1.5
2. Verify you're using the correct VAE for your model version
3. Ensure audio prompt matches video prompt timeline
4. Try generating at shorter durations (sync improves at 5-8 seconds)
5. Check that ComfyUI-Audio extension is latest version

Poor Audio Quality or Artifacts

Symptoms: Crackling, robotic voice, unnatural intonation, or audio glitches.

Solutions:

1. Increase sampling steps to 60-80 (audio needs more steps than video)
2. Verify audio codec file is correctly installed
3. Lower Audio CFG scale (too high causes artifacts)
4. Check your audio prompt isn't contradictory
5. Generate at higher audio sample rate (48kHz minimum)

Inconsistent Character Voices

Symptoms: Character voice changes between generations even with same description.

Solutions:

1. Use voice embedding extraction and reuse workflow
2. Make voice descriptions more detailed and specific
3. Set fixed seed for reproducible voice characteristics
4. Use "Voice Consistency" mode if available in your workflow
5. Consider extracting voice profile from first successful generation

CUDA Out of Memory Errors

Symptoms: Generation fails partway through with CUDA memory error.

Solutions:

1. Switch to quantized model version (FP8 or INT8)
2. Enable CPU offloading in ComfyUI settings
3. Close other VRAM-intensive applications
4. Generate shorter clips (split long content into chunks)
5. Reduce output resolution temporarily
6. Clear ComfyUI cache before starting new generation

Missing Audio Output

Symptoms: Video generates successfully but no audio file appears.

Solutions:

1. Verify ComfyUI-Audio extension is properly installed
2. Check that audio output node is connected in workflow
3. Confirm audio codec model file is in correct directory
4. Enable audio preview in ComfyUI settings
5. Check file permissions on output directory

For persistent issues not covered here, check the Character AI GitHub Issues page for recent bug reports and community solutions.

OVI Best Practices for Production Quality

Prompt Engineering for Maximum Quality

Layered Prompt Structure: Break complex scenes into layered descriptions rather than single long prompts.

Instead of: "Woman talking excitedly about AI in bright office with computer screens showing code"

Use: Video: "Professional woman, late 30s, business casual attire, animated facial expressions and gestures" Environment: "Modern bright office, large windows with natural light, computer screens in background" Camera: "Medium close-up, slight slow zoom, shoulder-level perspective" Audio: "Clear confident female voice with enthusiasm: [Your dialogue here], professional room acoustics, subtle keyboard typing in background"

This structured approach gives OVI clearer targets for each generation aspect.

Quality Control Workflow

Three-Stage Quality Process:

Stage 1 - Concept Validation (5 minutes):

• Low resolution (512p)
• 30 steps
• Verify prompt interpretation and basic synchronization
• Iterate on prompts quickly

Stage 2 - Quality Review (12 minutes):

• Medium resolution (720p)
• 50 steps
• Check voice quality, lip-sync accuracy, motion coherence
• Approve for final generation

Stage 3 - Final Render (20-30 minutes):

• Full resolution (1080p)
• 70-80 steps
• High audio sample rate (48kHz)
• Only for approved concepts

This staged approach prevents wasting hours on high-quality renders of flawed concepts.

Voice Profile Library Management

Build a reusable library of character voices for consistency across projects.

Organization System:

• /voice_profiles/characters/ - Fictional character voices
• /voice_profiles/narrators/ - Documentary/explainer voices
• /voice_profiles/clients/ - Client-specific brand voices
• /voice_profiles/languages/ - Language-specific voice sets

Document each profile with:

• Original generation prompt
• Sample audio file
• Use case notes
• Generation parameters used

Frequently Asked Questions

1. What is OVI and how is it different from traditional video generation tools?

OVI (Omni Video Intelligence) from Character AI generates synchronized video and audio simultaneously from text prompts using unified transformer architecture with cross-modal attention. Traditional workflow: generate video separately (15-30 min), generate audio (5-10 min), manually sync with Wav2Lip (20-40 min) = 40-80 min total. OVI: single generation (8-20 min) with perfect sync automatically. 50-75% time savings plus superior lip-sync quality.

2. What are the minimum system requirements to run OVI in ComfyUI?

Minimum: ComfyUI 0.3.50+, 12GB VRAM for OVI-Base model, 32GB system RAM, NVIDIA GPU with CUDA 12.0+ support. Recommended: 24GB VRAM for OVI-Pro model, 64GB system RAM, RTX 4090 or A6000 for optimal performance. OVI-Base handles 5-second clips, OVI-Pro handles 10-second clips, OVI-Extended handles 30-second clips but requires 24GB+ VRAM.

3. Can OVI maintain consistent character voices across multiple video clips?

Yes, using voice embedding workflow. Generate first clip with detailed voice description, use Extract Voice Embedding node to capture voice characteristics, save the voice embedding as preset, load embedding for future generations featuring same character. This ensures identical character voice across entire video series, crucial for storytelling projects and consistent character development.

4. How does OVI compare to using separate video and audio generation tools?

Traditional separate workflow: Runway/Kling video (15-30 min) + ElevenLabs audio (5-10 min) + Wav2Lip sync (20-40 min) = 40-80 min with manual sync issues. OVI workflow: Single generation (8-20 min) with perfect sync, no manual alignment needed, natural sound perspective matching visuals, consistent ambient audio. Quality is superior with zero post-processing sync work required.

5. Does OVI work with multiple speakers in dialogue or only single voice?

Yes, OVI handles multi-speaker dialogue in single generation. Use speaker tags in audio prompt: [Speaker A]: Hello there. [Speaker B]: Hi, how are you? Provide voice descriptions for each speaker. OVI automatically generates distinct voices with appropriate facial movements and lip-sync for each speaker, including natural conversational timing with pauses and overlaps.

6. What video and audio quality can I expect from OVI generations?

OVI-Base: 5 seconds max, 24kHz stereo audio, good for testing. OVI-Pro: 10 seconds max, 48kHz stereo audio, professional quality for dialogue scenes. OVI-Extended: 30 seconds max, 48kHz stereo audio, short-form content. Video quality comparable to mid-tier video generators but with synchronized audio advantage. Audio quality matches professional TTS systems with emotional inflection.

7. Can I use existing audio or video as input or does OVI only work with text?

OVI primarily works text-to-video-audio (T2VA). Image-to-Video-Audio (I2VA) workflow: upload source image, describe motion in video prompt, describe audio in audio prompt, generate. This animates static images with matching audio. Audio-to-video mode generates video from existing speech input. Video-to-audio and pure video conditioning are experimental features in development.

8. How long does it take to generate a video with OVI and what affects speed?

Generation time: 8-20 minutes depending on hardware and clip duration. OVI-Base (5 sec) on RTX 4090: 8-12 minutes. OVI-Pro (10 sec) on RTX 4090: 15-20 minutes. OVI-Pro (10 sec) on RTX 3080: 25-35 minutes. Factors: video duration, resolution, step count (40+ recommended), model version, available VRAM. First generation includes model loading (5-10 min).

9. Can I improve OVI quality through post-processing or must I get it right in generation?

Generation quality is best optimized during generation (steps, CFG, synchronization strength). Post-processing options: use Face Detailer on extracted frames for face enhancement, upscale video separately with video upscaling tools, enhance audio with noise reduction/EQ in audio editor, but lip-sync accuracy cannot be improved post-generation. Focus on prompt engineering and generation parameters for optimal initial results.

10. Is OVI compatible with ControlNet or other conditioning methods for more control?

Experimental support only. OVI's unified video-audio architecture makes traditional conditioning methods challenging to integrate. Some workflows support basic pose conditioning, but ControlNet/IP-Adapter integration is limited compared to image generation models. Focus on detailed text prompts for control. For maximum control over video content, traditional video generation + OVI audio-to-video mode may provide better results than pure OVI T2VA currently.

What's Next After Mastering OVI

You now have comprehensive knowledge of OVI's installation, workflows, optimization, and production techniques. You understand how to generate synchronized video-audio content that would take hours or days using traditional methods.

Recommended Next Steps:

1. Generate 15-20 test clips exploring different voice styles and emotions
2. Build your character voice profile library for reusable assets
3. Experiment with multi-speaker dialogue scenes
4. Set up chunk-based workflows for longer content
5. Join the OVI community forums to share results and techniques

Additional Learning Resources:

• Character AI Research Blog for technical deep-dives
• OVI GitHub Repository for model documentation
• ComfyUI-Audio Wiki for audio node tutorials
• Community Discord channels for OVI-specific discussions and troubleshooting

OVI represents a approach shift in AI video creation. The unified video-audio generation approach eliminates the synchronization headaches that plague traditional workflows. Whether you're producing educational content, developing game assets, creating marketing materials, or building entertainment media, OVI puts professional synchronized video-audio generation directly in your hands.

The future of content creation isn't about choosing between video or audio tools. It's about unified generation that treats audiovisual content as the integrated experience it should be. OVI makes that future available right now in ComfyUI, ready for you to explore and master.