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Kling Start-End Frame to Video node creates a video sequence that transitions between your provided start and end images. It generates all the frames in between to produce a smooth transformation from the first frame to the last frame. This node calls the image-to-video API but only supports the input options that work with the image_tail request field.

Inputs

ParameterData TypeRequiredRangeDescription
start_frameIMAGEYes-Reference Image - URL or Base64 encoded string, cannot exceed 10MB, resolution not less than 300*300px, aspect ratio between 1:2.5 ~ 2.5:1. Base64 should not include data:image prefix.
end_frameIMAGEYes-Reference Image - End frame control. URL or Base64 encoded string, cannot exceed 10MB, resolution not less than 300*300px. Base64 should not include data:image prefix.
promptSTRINGYes-Positive text prompt
negative_promptSTRINGYes-Negative text prompt
cfg_scaleFLOATNo0.0-1.0Controls the strength of the prompt guidance (default: 0.5)
aspect_ratioCOMBONo”16:9"
"9:16"
"1:1"
"21:9"
"9:21"
"3:4"
"4:3”
The aspect ratio for the generated video (default: “16:9”)
modeCOMBONoMultiple options availableThe configuration to use for the video generation following the format: mode / duration / model_name. (default: third option from available modes)
Image Constraints:
  • Both start_frame and end_frame must be provided and cannot exceed 10MB file size
  • Minimum resolution: 300×300 pixels for both images
  • start_frame aspect ratio must be between 1:2.5 and 2.5:1
  • Base64 encoded images should not include the “data:image” prefix

Outputs

Output NameData TypeDescription
outputVIDEOThe generated video sequence
video_idSTRINGUnique identifier for the generated video
durationSTRINGDuration of the generated video