{ "name": "万川 API｜视频生视频（H.264 MP4 原始视频直传）", "nodes": [ { "parameters": {}, "id": "d93ecf6c-0dcf-4d3f-a344-0a37285b6191", "name": "手动触发", "type": "n8n-nodes-base.manualTrigger", "typeVersion": 1, "position": [ -1340, 220 ] }, { "parameters": { "assignments": { "assignments": [ { "id": "cf707f02-b7bc-445c-a0f6-c4a317d7ae82", "name": "input_file", "value": "D:/n8n-input/reference.mp4", "type": "string" }, { "id": "14cda259-f032-407d-aeb6-46e78702966a", "name": "model", "value": "REPLACE_MODEL_FROM_AUTHORIZED_MEDIA_CATALOG", "type": "string" }, { "id": "wanchuan-parameter-mode-video", "name": "parameter_mode", "value": "model_defaults", "type": "string" }, { "id": "5ba1fd83-e304-49ed-9af4-d36e9960a386", "name": "prompt", "value": "保持原视频主体、动作连续性和画面结构，生成自然稳定的风格变化。", "type": "string" }, { "id": "eb47d751-e135-489c-9b93-657f93d7fa85", "name": "duration", "value": 4, "type": "number" }, { "id": "31afe5dc-64cd-4e27-b905-021c05f7fa21", "name": "resolution", "value": "480p", "type": "string" }, { "id": "e57f3b5e-b0f7-4aaf-9d2f-ae75ad519c5e", "name": "aspect_ratio", "value": "auto", "type": "string" }, { "id": "cbaea48b-af21-4420-92f6-7a01b586e586", "name": "idempotency_nonce", "value": "REPLACE_WITH_UNIQUE_RUN_NONCE_MIN_8_CHARS", "type": "string" }, { "id": "924896c3-7fb8-431d-af8f-dc607aee643f", "name": "provider_processing_acknowledged", "value": false, "type": "boolean" }, { "id": "4afde411-9be9-4936-9495-eddd5c1d6725", "name": "poll_limit", "value": 360, "type": "number" } ] }, "options": {} }, "id": "eeb1e350-c755-451a-91b8-140e441859d1", "name": "万川｜运行配置", "type": "n8n-nodes-base.set", "typeVersion": 3.4, "position": [ -1120, 220 ] }, { "parameters": { "url": "https://api.wanchuanapi.com/v1/media/models", "authentication": "genericCredentialType", "genericAuthType": "httpHeaderAuth", "options": { "timeout": 45000, "redirect": { "redirect": { "followRedirects": false } } } }, "id": "wanchuan-authorized-media-models-video", "name": "万川｜读取授权媒体目录", "type": "n8n-nodes-base.httpRequest", "typeVersion": 4.2, "position": [ -900, -120 ], "credentials": { "httpHeaderAuth": { "id": "REPLACE_WITH_WANCHUAN_CREDENTIAL_ID", "name": "万川 API Bearer（导入后选择）" } } }, { "parameters": { "jsCode": "const referenceKind = 'video';\n// Embedded verbatim after referenceKind in both downloadable workflows.\nconst config = $node['万川｜运行配置'].json;\nconst model = String(config.model || '').trim();\nconst prompt = String(config.prompt || '').trim();\nif (!model || model.startsWith('REPLACE_')) throw new Error('请从 GET /v1/media/models 复制当前 API Key 的精确模型 ID，替换 model 占位符');\nif (!prompt) throw new Error('prompt 不能为空');\nconst catalog = $input.first().json;\nif (!Array.isArray(catalog.data)) throw new Error('授权媒体目录不可用；未上传素材或创建任务');\nconst matches = catalog.data.filter(item => item.id === model);\nif (matches.length !== 1) throw new Error('所选 model 不在当前 API Key 的授权媒体目录中');\nconst offer = matches[0];\nconst promptContract = offer.prompt_contract || {};\nconst characters = Array.from(prompt).length;\nif ((promptContract.empty_only && prompt) || characters < (promptContract.minimum_characters || 0)\n || (promptContract.maximum_characters > 0 && characters > promptContract.maximum_characters)\n || (promptContract.maximum_utf8_bytes > 0 && Buffer.byteLength(prompt, 'utf8') > promptContract.maximum_utf8_bytes)) throw new Error('提示词超出所选模型的公开限制');\nconst capability = referenceKind + '_to_video';\nif (offer.kind !== 'video_generation' || !offer.capabilities?.includes(capability)) throw new Error('所选模型未开放 ' + capability);\nconst schema = offer.parameters;\nconst reference = schema?.reference;\nif (!reference?.accepted?.includes(referenceKind) || reference.minimum > 1 || reference.maximum < 1) throw new Error('所选模型不支持当前参考素材类型或数量');\nif (config.provider_processing_acknowledged !== true) throw new Error('请先阅读所选模型的数据处理说明并明确开启处理确认');\n// Missing mode preserves the original workflow's explicit parameter behavior.\nconst mode = config.parameter_mode ?? 'explicit';\nif (!['model_defaults', 'explicit'].includes(mode)) throw new Error('parameter_mode 必须是 model_defaults（跟随模型默认）或 explicit（使用手填参数）');\nconst parameters = mode === 'model_defaults' ? {} : {duration: Number(config.duration), resolution: String(config.resolution || '').trim(), generate_audio: false};\nif (mode === 'explicit' && referenceKind === 'video' && config.aspect_ratio !== 'auto') parameters.aspect_ratio = String(config.aspect_ratio || '').trim();\nif (reference.aspect_ratio_follows_first_frame && Object.hasOwn(parameters, 'aspect_ratio')) throw new Error('所选模型比例跟随首帧，请把 aspect_ratio 设为 auto');\nfor (const [name, value] of Object.entries(parameters)) {\n const rule = schema?.[name];\n if (!rule) throw new Error('所选模型不支持参数 ' + name + '；未忽略该参数');\n let valid = false;\n if (Array.isArray(rule.options)) valid = rule.options.some(option => option.value === value);\n else if (Number.isInteger(rule.minimum) && Number.isInteger(rule.maximum)) {\n const step = rule.step ?? 1;\n valid = Number.isInteger(value) && value >= rule.minimum && value <= rule.maximum && Number.isInteger(step) && step > 0 && (value - rule.minimum) % step === 0;\n if (Array.isArray(rule.allowed_values) && rule.allowed_values.length) valid = valid && rule.allowed_values.includes(value);\n } else if (typeof rule.default === 'boolean') valid = typeof value === 'boolean';\n if (!valid) throw new Error('参数 ' + name + ' 不符合所选模型的公开能力');\n}\nreturn [{json: {...config, model, prompt, request_parameters: parameters}}];\n" }, "id": "wanchuan-validate-media-model-video", "name": "万川｜核对模型与参数", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ -680, -120 ] }, { "parameters": { "operation": "read", "fileSelector": "={{ $node[\"万川｜运行配置\"].json.input_file }}", "options": {} }, "id": "9dc2ccfc-c301-43ed-b8f6-ae61c540e7a0", "name": "万川｜读取参考视频", "type": "n8n-nodes-base.readWriteFile", "typeVersion": 1, "position": [ -900, 220 ] }, { "parameters": { "jsCode": "const item = $input.first();\nconst config = $node['万川｜核对模型与参数'].json;\nif (!item.binary?.data) throw new Error('缺少 binary.data 参考视频');\nif (config.provider_processing_acknowledged !== true) {\n throw new Error('请在阅读万川所选模型的数据处理说明后，在“万川｜运行配置”中明确开启处理确认');\n}\nconst nonce = String(config.idempotency_nonce || '').trim();\nif (!/^[A-Za-z0-9._:-]{8,96}$/.test(nonce) || nonce.startsWith('REPLACE_')) {\n throw new Error('请为本次逻辑任务设置 8–96 位唯一 idempotency_nonce；响应超时后重跑必须保持不变，新任务必须更换');\n}\nconst binary = item.binary.data;\nconst contentType = String(binary.mimeType || '').trim().toLowerCase();\nif (contentType !== 'video/mp4') throw new Error('参考视频必须预先转换为 H.264 MP4，MIME type 必须是 video/mp4');\nif (!binary.id) throw new Error('大视频必须使用 n8n filesystem 或企业 external binary mode；本模板拒绝把 inline binary 全量载入内存');\nconst metadata = await this.helpers.getBinaryMetadata(binary.id);\nconst contentLength = Number(metadata?.fileSize);\nif (!Number.isSafeInteger(contentLength) || contentLength <= 0) throw new Error('无法从 n8n binary metadata 取得准确视频字节数');\nif (contentLength > 500 * 1024 * 1024) throw new Error('参考视频不能超过万川 500 MiB 接收上限');\nconst duration = Number(config.duration);\nconst pollLimit = Number(config.poll_limit);\nif (!Number.isInteger(pollLimit) || pollLimit < 1 || pollLimit > 1440) throw new Error('运行配置 poll_limit 必须是 1 到 1440 的整数');\nconst model = String(config.model || '').trim();\nconst prompt = String(config.prompt || '').trim();\nif (!model || !prompt) throw new Error('运行配置 model 和 prompt 不能为空');\nreturn [{\n json: {\n request_parameters: config.request_parameters,\n content_type: contentType,\n content_length: contentLength,\n idempotency_nonce: nonce,\n model,\n prompt,\n duration,\n resolution: String(config.resolution || '').trim(),\n aspect_ratio: String(config.aspect_ratio || '').trim(),\n poll_limit: pollLimit\n },\n binary: item.binary\n}];" }, "id": "e761057d-d204-4a2b-866c-e8e0a10382a6", "name": "万川｜准备视频上传", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ -680, 220 ] }, { "parameters": { "method": "POST", "url": "https://api.wanchuanapi.com/v1/media/inputs", "authentication": "genericCredentialType", "genericAuthType": "httpHeaderAuth", "sendHeaders": true, "headerParameters": { "parameters": [ { "name": "Idempotency-Key", "value": "={{ ('n8n-video-input-' + $node[\"万川｜准备视频上传\"].json.idempotency_nonce).slice(0, 128) }}" }, { "name": "Content-Type", "value": "={{ $json.content_type }}" }, { "name": "Content-Length", "value": "={{ String($json.content_length) }}" } ] }, "sendBody": true, "contentType": "binaryData", "inputDataFieldName": "data", "options": { "timeout": 600000, "redirect": { "redirect": { "followRedirects": false } } } }, "id": "2c6766b7-cc3f-40d7-b01a-c11c52cbce8d", "name": "万川｜上传媒体输入", "type": "n8n-nodes-base.httpRequest", "typeVersion": 4.2, "position": [ -440, 100 ], "credentials": { "httpHeaderAuth": { "id": "REPLACE_WITH_WANCHUAN_CREDENTIAL_ID", "name": "万川 API Bearer（导入后选择）" } } }, { "parameters": { "method": "POST", "url": "https://api.wanchuanapi.com/v1/media/jobs", "authentication": "genericCredentialType", "genericAuthType": "httpHeaderAuth", "sendHeaders": true, "headerParameters": { "parameters": [ { "name": "Idempotency-Key", "value": "={{ ('n8n-video-job-' + $node[\"万川｜准备视频上传\"].json.idempotency_nonce).slice(0, 128) }}" }, { "name": "Content-Type", "value": "application/json" } ] }, "sendBody": true, "specifyBody": "json", "jsonBody": "={{ (() => { const input = $node[\"万川｜上传媒体输入\"].json.input; if (input?.status !== \"ready\" || !/^[A-Za-z0-9_-]{1,160}$/.test(input?.id || \"\")) throw new Error(\"媒体输入未返回有效 ready ID；未创建任务\"); return JSON.stringify({ kind: \"video_generation\", model: $node[\"万川｜准备视频上传\"].json.model, prompt: $node[\"万川｜准备视频上传\"].json.prompt, parameters: { ...$node[\"万川｜准备视频上传\"].json.request_parameters, input_asset_ids: [input.id], provider_processing_acknowledged: true } }); })() }}", "options": { "timeout": 45000, "redirect": { "redirect": { "followRedirects": false } } } }, "id": "dc23d364-a09e-4305-9363-d3d355033106", "name": "万川｜创建视频生视频任务", "type": "n8n-nodes-base.httpRequest", "typeVersion": 4.2, "position": [ 520, 220 ], "credentials": { "httpHeaderAuth": { "id": "REPLACE_WITH_WANCHUAN_CREDENTIAL_ID", "name": "万川 API Bearer（导入后选择）" } } }, { "parameters": { "amount": 5, "unit": "seconds" }, "id": "153a6218-b6a8-4659-a47f-3cdbf5dd9922", "name": "等待 5 秒", "type": "n8n-nodes-base.wait", "typeVersion": 1.1, "position": [ 760, 220 ], "webhookId": "6bce63c9-0eb4-43d0-b4fc-aa59a585eb2d" }, { "parameters": { "url": "={{ 'https://api.wanchuanapi.com/v1/media/jobs/' + encodeURIComponent($node[\"万川｜创建视频生视频任务\"].json.id) }}", "authentication": "genericCredentialType", "genericAuthType": "httpHeaderAuth", "options": { "timeout": 45000, "redirect": { "redirect": { "followRedirects": false } } } }, "id": "f5cf6f32-d4b9-4a4c-b3cf-afbdb3c4bd08", "name": "万川｜查询任务", "type": "n8n-nodes-base.httpRequest", "typeVersion": 4.2, "position": [ 1000, 220 ], "credentials": { "httpHeaderAuth": { "id": "REPLACE_WITH_WANCHUAN_CREDENTIAL_ID", "name": "万川 API Bearer（导入后选择）" } } }, { "parameters": { "jsCode": "const job = $input.first().json;\nconst status = String(job.status || '').toLowerCase();\nif (['failed', 'cancelled', 'canceled', 'expired', 'submission_uncertain'].includes(status)) {\n const safeMessage = String(job.error_message || '未返回详情').replace(/https?:\\/\\/\\S+/gi, '[redacted-url]').slice(0, 500);\n throw new Error(`万川任务失败（${job.error_code || status}）：${safeMessage}`);\n}\nconst done = ['succeeded', 'completed', 'success'].includes(status);\nconst pollLimit = Number($node['万川｜运行配置'].json.poll_limit);\nconst pollCount = $runIndex + 1;\nif (!done && pollCount >= pollLimit) throw new Error(`已达到万川轮询上限 ${pollLimit} 次；工作流不会自动重提收费任务`);\nif (done && !job.asset_id) {\n throw new Error('任务已完成但没有返回 asset_id；为避免绕开万川连接，本模板不会改连其他下载节点');\n}\nreturn [{ json: { ...job, output_url: undefined, poll_count: pollCount, done } }];" }, "id": "e033e732-7739-417a-b4b8-5fa462c047a7", "name": "万川｜检查任务状态", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ 1240, 220 ] }, { "parameters": { "conditions": { "options": { "caseSensitive": true, "leftValue": "", "typeValidation": "strict", "version": 2 }, "conditions": [ { "id": "e6b8b25a-335d-4f33-86c7-887090aed910", "leftValue": "={{ $json.done }}", "rightValue": true, "operator": { "type": "boolean", "operation": "true", "singleValue": true } } ], "combinator": "and" }, "options": {} }, "id": "8d025e2d-61a6-4f1a-817f-e08d66d0dc90", "name": "万川｜是否完成", "type": "n8n-nodes-base.if", "typeVersion": 2.2, "position": [ 1480, 220 ] }, { "parameters": { "url": "={{ 'https://api.wanchuanapi.com/v1/media/assets/' + encodeURIComponent($json.asset_id) }}", "authentication": "genericCredentialType", "genericAuthType": "httpHeaderAuth", "options": { "response": { "response": { "responseFormat": "file", "outputPropertyName": "data" } }, "timeout": 120000, "redirect": { "redirect": { 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