lightricks/ltx-2.3-fast

Lightning-fast video generation with portrait support, camera controls, and synchronized audio. Up to 20 seconds at 1080p, 4K at 50 FPS.

Capabilities

Reference Images

Community model (estimated from hardware time)

Name	Type	Description	Default	Constraints
`prompt`*	string	Text prompt describing the video to generate	`—`	—
`aspect_ratio`	string	Aspect ratio of the generated video	`"16:9"`	16:99:16
`camera_motion`	string	Camera motion effect to apply to the generated video. Use 'none' for no camera motion.	`"none"`	nonedolly_indolly_outdolly_leftdolly_rightjib_upjib_downstaticfocus_shift
`duration`	integer	Duration of the video in seconds. Durations longer than 10 seconds are only available with 1080p resolution at 24 or 25 FPS.	`6`	68101214161820
`fps`	integer	Frame rate in frames per second	`25`	24254850
`generate_audio`	boolean	Generate audio for the video. Used for text_to_video and image_to_video tasks.	`true`	—
`image`	string(uri)	First frame image for image-to-video generation	`—`	—
`last_frame_image`	string(uri)	Last frame image for image-to-video generation. When provided, the video interpolates between the first frame and this last frame.	`—`	—
`resolution`	string	Resolution quality of the generated video. Only 1080p is supported for audio_to_video, retake, and extend tasks.	`"1080p"`	1080p2k4k

promptrequiredstring

Text prompt describing the video to generate

aspect_ratiostring

Aspect ratio of the generated video

Default: "16:9"

16:99:16

camera_motionstring

Camera motion effect to apply to the generated video. Use 'none' for no camera motion.

Default: "none"

nonedolly_indolly_outdolly_leftdolly_rightjib_upjib_downstaticfocus_shift

durationinteger

Duration of the video in seconds. Durations longer than 10 seconds are only available with 1080p resolution at 24 or 25 FPS.

Default: 6

68101214161820

fpsinteger

Frame rate in frames per second

Default: 25

24254850

generate_audioboolean

Generate audio for the video. Used for text_to_video and image_to_video tasks.

Default: true

imagestring

First frame image for image-to-video generation

last_frame_imagestring

Last frame image for image-to-video generation. When provided, the video interpolates between the first frame and this last frame.

resolutionstring

Resolution quality of the generated video. Only 1080p is supported for audio_to_video, retake, and extend tasks.

Default: "1080p"

1080p2k4k

Version: 6e44d7e6b51dUpdated: 8/13/202624.8K runs