PixVerse Transition Video 节点连接到 PixVerse 的过渡视频生成 API，允许你提供开始和结束图像，生成在两者之间平滑过渡的视频序列。节点会自动创建所有中间帧，产生流畅的变换效果，特别适合创建变形、场景转换和对象演变等视觉效果。

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参数说明

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必需参数

参数类型默认值说明
first_frame图像-视频的起始帧图像
last_frame图像-视频的结束帧图像
prompt字符串""描述视频内容和过渡效果的文本提示词
quality选择项”PixverseQuality.res_540p”生成视频的质量级别
duration_seconds选择项-生成视频的持续时间
motion_mode选择项-视频的动作模式
seed整数0生成过程的随机种子，范围0-2147483647

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可选参数

参数类型默认值说明
negative_prompt字符串""指定不希望在视频中出现的元素
pixverse_templatePIXVERSE_TEMPLATENone可选的PixVerse模板配置，影响生成风格

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参数限制说明

  • 当quality设置为1080p时，动作模式(motion_mode)会强制设为normal，持续时间(duration_seconds)会强制设为5秒
  • 当持续时间(duration_seconds)不等于5秒时，动作模式(motion_mode)会强制设为normal

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输出

输出类型说明
VIDEO视频生成的视频结果

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源码参考


class PixverseTransitionVideoNode(ComfyNodeABC):
    """
    Generates videos synchronously based on prompt and output_size.
    """

    RETURN_TYPES = (IO.VIDEO,)
    DESCRIPTION = cleandoc(__doc__ or "")  # Handle potential None value
    FUNCTION = "api_call"
    API_NODE = True
    CATEGORY = "api node/video/Pixverse"

    @classmethod
    def INPUT_TYPES(s):
        return {
            "required": {
                "first_frame": (
                    IO.IMAGE,
                ),
                "last_frame": (
                    IO.IMAGE,
                ),
                "prompt": (
                    IO.STRING,
                    {
                        "multiline": True,
                        "default": "",
                        "tooltip": "Prompt for the video generation",
                    },
                ),
                "quality": (
                    [resolution.value for resolution in PixverseQuality],
                    {
                        "default": PixverseQuality.res_540p,
                    },
                ),
                "duration_seconds": ([dur.value for dur in PixverseDuration],),
                "motion_mode": ([mode.value for mode in PixverseMotionMode],),
                "seed": (
                    IO.INT,
                    {
                        "default": 0,
                        "min": 0,
                        "max": 2147483647,
                        "control_after_generate": True,
                        "tooltip": "Seed for video generation.",
                    },
                ),
            },
            "optional": {
                "negative_prompt": (
                    IO.STRING,
                    {
                        "default": "",
                        "forceInput": True,
                        "tooltip": "An optional text description of undesired elements on an image.",
                    },
                ),
                "pixverse_template": (
                    PixverseIO.TEMPLATE,
                    {
                        "tooltip": "An optional template to influence style of generation, created by the Pixverse Template node."
                    }
                )
            },
            "hidden": {
                "auth_token": "AUTH_TOKEN_COMFY_ORG",
            },
        }

    def api_call(
        self,
        first_frame: torch.Tensor,
        last_frame: torch.Tensor,
        prompt: str,
        quality: str,
        duration_seconds: int,
        motion_mode: str,
        seed,
        negative_prompt: str=None,
        pixverse_template: int=None,
        auth_token=None,
        **kwargs,
    ):
        first_frame_id = upload_image_to_pixverse(first_frame, auth_token=auth_token)
        last_frame_id = upload_image_to_pixverse(last_frame, auth_token=auth_token)

        # 1080p is limited to 5 seconds duration
        # only normal motion_mode supported for 1080p or for non-5 second duration
        if quality == PixverseQuality.res_1080p:
            motion_mode = PixverseMotionMode.normal
            duration_seconds = PixverseDuration.dur_5
        elif duration_seconds != PixverseDuration.dur_5:
            motion_mode = PixverseMotionMode.normal

        operation = SynchronousOperation(
            endpoint=ApiEndpoint(
                path="/proxy/pixverse/video/transition/generate",
                method=HttpMethod.POST,
                request_model=PixverseTransitionVideoRequest,
                response_model=PixverseVideoResponse,
            ),
            request=PixverseTransitionVideoRequest(
                first_frame_img=first_frame_id,
                last_frame_img=last_frame_id,
                prompt=prompt,
                quality=quality,
                duration=duration_seconds,
                motion_mode=motion_mode,
                negative_prompt=negative_prompt if negative_prompt else None,
                template_id=pixverse_template,
                seed=seed,
            ),
            auth_token=auth_token,
        )
        response_api = operation.execute()

        if response_api.Resp is None:
            raise Exception(f"Pixverse request failed: '{response_api.ErrMsg}'")

        operation = PollingOperation(
            poll_endpoint=ApiEndpoint(
                path=f"/proxy/pixverse/video/result/{response_api.Resp.video_id}",
                method=HttpMethod.GET,
                request_model=EmptyRequest,
                response_model=PixverseGenerationStatusResponse,
            ),
            completed_statuses=[PixverseStatus.successful],
            failed_statuses=[PixverseStatus.contents_moderation, PixverseStatus.failed, PixverseStatus.deleted],
            status_extractor=lambda x: x.Resp.status,
            auth_token=auth_token,
        )
        response_poll = operation.execute()

        vid_response = requests.get(response_poll.Resp.url)
        return (VideoFromFile(BytesIO(vid_response.content)),)