BFL

This page is auto-generated from model configurations. Last updated: 2026-08-18.

This reference lists all available BFL video generation models and their parameters. Use these parameter names when calling the Generation API.

• FLUX.3 Extend Video
• FLUX.3 First Last Frame to Video
• FLUX.3 Image to Video
• FLUX.3 Keyframes to Video
• FLUX.3 Text to Video

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FLUX.3 Extend Video

Black Forest Labs FLUX.3 extend-video - continue an existing clip (MP4, <50MB, <15s) for 5-20s at 720p/1080p with native audio.

Model ID: model_bfl-flux-3-extend

Capabilities: video2video

LLM Markdown: https://app.scenario.com/api/models/model_bfl-flux-3-extend/markdown

Parameter	Type	Required	Default	Min	Max	Allowed Values	Description
prompt	string	Yes	-	-	-	-	Text prompt describing how the video continues from the source clip’s final frames.
video	file	Yes	-	-	-	-	Source video to extend (under 50 MB and under 15 seconds).
aspectRatio	string	No	auto	-	-	auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4, 9:16	Aspect ratio of the generated video. Auto lets the model choose.
resolution	string	No	1080p	-	-	720p, 1080p	Output resolution. 1080p is Full HD.
duration	string	No	auto	-	-	auto, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20	Duration of the generated continuation in whole seconds (5-20), or Auto. Auto is billed at the maximum (20s).
generateAudio	boolean	No	true	-	-	-	Whether to generate synchronized audio for the video. Included at no extra cost.

FLUX.3 First Last Frame to Video

Black Forest Labs FLUX.3 first/last-frame video - interpolate between two images over 5-20s at 720p/1080p with native audio.

Model ID: model_bfl-flux-3-first-last-frame

Capabilities: img2video

LLM Markdown: https://app.scenario.com/api/models/model_bfl-flux-3-first-last-frame/markdown

Parameter	Type	Required	Default	Min	Max	Allowed Values	Description
prompt	string	Yes	-	-	-	-	Text prompt describing the transition between the first and last frames.
image	file	Yes	-	-	-	-	Image used as the first frame.
endImage	file	Yes	-	-	-	-	Image used as the last frame.
aspectRatio	string	No	auto	-	-	auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4, 9:16	Aspect ratio of the generated video. Auto lets the model choose.
resolution	string	No	1080p	-	-	720p, 1080p	Output resolution. 1080p is Full HD.
duration	number	No	5	-	-	5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20	Duration in whole seconds (5-20). Required to place frames correctly.
generateAudio	boolean	No	true	-	-	-	Whether to generate synchronized audio for the video. Included at no extra cost.

FLUX.3 Image to Video

Black Forest Labs FLUX.3 image-to-video - animate a still into up to 20s of 720p/1080p video with native audio.

Model ID: model_bfl-flux-3-i2v

Capabilities: img2video

LLM Markdown: https://app.scenario.com/api/models/model_bfl-flux-3-i2v/markdown

Parameter	Type	Required	Default	Min	Max	Allowed Values	Description
prompt	string	Yes	-	-	-	-	Text prompt describing how to animate the source image.
image	file	Yes	-	-	-	-	Opening frame image.
aspectRatio	string	No	auto	-	-	auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4, 9:16	Aspect ratio of the generated video. Auto lets the model choose.
resolution	string	No	1080p	-	-	720p, 1080p	Output resolution. 1080p is Full HD.
duration	string	No	auto	-	-	auto, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20	Duration in whole seconds (5-20), or Auto to let the model choose.
generateAudio	boolean	No	true	-	-	-	Whether to generate synchronized audio for the video. Included at no extra cost.

FLUX.3 Keyframes to Video

Black Forest Labs FLUX.3 keyframes-to-video - pin up to 10 images to frame positions over 5-20s at 720p/1080p with native audio.

Model ID: model_bfl-flux-3-keyframes

Capabilities: img2video

LLM Markdown: https://app.scenario.com/api/models/model_bfl-flux-3-keyframes/markdown

Parameter	Type	Required	Default	Min	Max	Allowed Values	Description
prompt	string	Yes	-	-	-	-	Text prompt describing the video across the keyframes.
keyframes	inputs_array	Yes	-	-	-	-	Keyframe images pinned to frame positions (24 fps). Up to 10 keyframes with unique frame indexes (0 … duration*24).
aspectRatio	string	No	auto	-	-	auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4, 9:16	Aspect ratio of the generated video. Auto lets the model choose.
resolution	string	No	1080p	-	-	720p, 1080p	Output resolution. 1080p is Full HD.
duration	number	No	5	-	-	5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20	Duration in whole seconds (5-20). Required to validate keyframe positions.
generateAudio	boolean	No	true	-	-	-	Whether to generate synchronized audio for the video. Included at no extra cost.

FLUX.3 Text to Video

Black Forest Labs FLUX.3 text-to-video - up to 20s at 720p/1080p with native audio and free-form duration.

Model ID: model_bfl-flux-3-t2v

Capabilities: txt2video

LLM Markdown: https://app.scenario.com/api/models/model_bfl-flux-3-t2v/markdown

Parameter	Type	Required	Default	Min	Max	Allowed Values	Description
prompt	string	Yes	-	-	-	-	Text prompt describing the video to generate.
aspectRatio	string	No	auto	-	-	auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4, 9:16	Aspect ratio of the generated video. Auto lets the model choose.
resolution	string	No	1080p	-	-	720p, 1080p	Output resolution. 1080p is Full HD.
duration	string	No	auto	-	-	auto, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20	Duration in whole seconds (5-20), or Auto to let the model choose.
generateAudio	boolean	No	true	-	-	-	Whether to generate synchronized audio for the video. Included at no extra cost.