Create talking or singing portrait videos from uploaded audio and portrait images with LTX 2.3. The workflow generates successive segments, spatially upscales and refines them, blends their boundaries, and saves individual segment videos plus an assembled H.264 MP4 at 25 FPS. Both saved outputs use the selected original recording, including accompaniment.
Workflow details
Sources
1 sourceRuntime profile
Hover nodes for Pipe controls
Core
Primary Pipe surface
Driving audio
VHS_LoadAudioUpload
Shot 1 image
LoadImage
Shot 1 prompt
Text Multiline
Shot 2 image
LoadImage
Shot 2 prompt
Text Multiline
Shot 3 image
LoadImage
Shot 3 prompt
Text Multiline
Shot 4 image
LoadImage
Shot 4 prompt
Text Multiline
Portrait framing size
TKVideoUserInputsBasic
Segment duration
INTConstant
Extended
Additional surfaced controls
Negative prompt
CLIPTextEncode
Shot 1 framing
ImageResizeKJv2
Shot 2 framing
ImageResizeKJv2
Image guidance
LTXVImgToVideoInplace
Refinement image guidance
LTXVImgToVideoInplace
Camera and LoRAs
Lora Loader Stack (rgthree)
Segment transitions
TKCrossDissolve
Generation variation
RandomNoise
Generation sampling
LTXVScheduler
Generation guidance
CFGGuider
Generation sampler
KSamplerSelect
Refinement variation
RandomNoise
Refinement guidance
CFGGuider
Refinement sampler
KSamplerSelect
Refinement schedule
ManualSigmas
Decode tiling
LTXVSpatioTemporalTiledVAEDecode
Final video encoding
VHS_VideoCombine
Segment video encoding
VHS_VideoCombine
Original audio chunking
TKSmartAudioChunker
Vocal segment boundaries
TKSmartAudioChunker
Portrait preprocessing
LTXVPreprocess
Remaining hardware or download-size estimates are not available yet.
Requirements
Text encoder · 6.92 GB · GGUF · Unknown
ltx-2-19b-lora-camera-control-static.safetensors
Not resolvedLoRA · Unknown
Upscaler · Hugging Face · Lightricks/LTX-2 · LTX 2
ltx-2.3_text_projection_bf16.safetensors
Not resolvedText encoder · Unknown
LTX-2.3-distilled-Q5_K_S.gguf
Not resolvedCheckpoint · Unknown
VAE · 348 MB · SAFETENSORS · bf16 · full · Unknown
LTX23_video_vae_bf16.safetensors
File unverifiedVAE · Unknown · LTX23 Video VAE Bf16.safetensors
Checkpoint · 435 MB · SAFETENSORS · Unknown
basic_data_handling
Not resolvedNode pack · Registry
comfy-mtb
FoundNode pack · Registry
comfyui-easy-use
FoundNode pack · Registry
ComfyUI-GGUF
PossibleNode pack · Registry
comfyui-handynodes-kt
Not resolvedNode pack · Registry
Node pack · Registry
ComfyUI-LTXVideo
FoundNode pack · Registry
ComfyUI-MelBandRoFormer
FoundNode pack · Registry
comfyui-videohelpersuite
FoundNode pack · Registry
rgthree-comfy
FoundNode pack · Registry
was-ns
Not resolvedNode pack · Registry