{ "name": "SRT Translator", "nodes": [ { "parameters": { "formTitle": "SRT Translator", "formDescription": "Translate SRT subtitle files to any language", "formFields": { "values": [ { "fieldLabel": "srt_file", "fieldType": "file", "multipleFiles": false, "acceptFileTypes": ".srt", "requiredField": true }, { "fieldLabel": "target_lang", "placeholder": "Spanish", "requiredField": true }, { "fieldLabel": "source_lang", "placeholder": "English (default)" } ] }, "responseMode": "lastNode", "options": {} }, "type": "n8n-nodes-base.formTrigger", "typeVersion": 2.2, "position": [ -6224, 3248 ], "id": "bb55a87c-b8d7-43f0-aa1e-23eca9a371a1", "name": "On form submission" }, { "parameters": { "jsCode": "/**\n * N8N Code Box: Subtitle Array Batch Splitter\n * Purpose: Splits subtitle arrays into smaller batches of N items for processing\n * Input: Items with 'subtitles' array property\n * Output: Multiple items, each containing a batch of subtitles with metadata\n */\nconst BATCH_SIZE = $input.item.json.BATCH_SIZE || 50;\nconst outputItems = [];\n\nfor (const item of $input.all()) {\n const subtitles = item.json.subtitles || [];\n\n if (subtitles.length === 0) {\n const { subtitles: _, ...restJson } = item.json;\n outputItems.push({\n json: {\n ...restJson,\n batch_subtitles: [],\n batch_number: 0,\n batch_size: 0,\n total_subtitles: 0,\n total_batches: 0\n }\n });\n continue;\n }\n\n const totalBatches = Math.ceil(subtitles.length / BATCH_SIZE);\n const { subtitles: _, ...restJson } = item.json;\n\n for (let i = 0; i < subtitles.length; i += BATCH_SIZE) {\n const batchNumber = Math.floor(i / BATCH_SIZE) + 1;\n const batch = subtitles.slice(i, i + BATCH_SIZE);\n\n outputItems.push({\n json: {\n ...restJson,\n batch_subtitles: batch,\n batch_number: batchNumber,\n batch_size: batch.length,\n total_subtitles: subtitles.length,\n total_batches: totalBatches,\n batch_start_index: i + 1,\n batch_end_index: Math.min(i + BATCH_SIZE, subtitles.length)\n }\n });\n }\n}\n\nreturn outputItems;\n" }, "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ -5344, 3008 ], "id": "6d6bc8cf-2a59-4cdb-a331-675eab6a4917", "name": "Split in batches" }, { "parameters": { "jsCode": "/**\n * N8N Code Box: Translation Batch Merger and SRT Data Combiner\n * Purpose: Collects all translated batches from input, deduplicates by index,\n * and combines in a single list\n * Input: All translated batch items\n * Output: Single item with all translations sorted by index\n */\nconst allTranslations = [];\n\nfor (const item of $input.all()) {\n const output = item.json.output || [];\n for (const t of output) {\n allTranslations.push(t);\n }\n}\n\n// Deduplicate by index, last write wins (handles retries), then sort ascending\nconst map = {};\nfor (const t of allTranslations) map[t.index] = t;\nconst sorted = Object.values(map).sort((a, b) => a.index - b.index);\n\nreturn [{\n json: {\n subtitles_translated: sorted,\n total_translations: sorted.length\n }\n}];\n" }, "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ -4832, 2992 ], "id": "ea1c7c47-fddc-423d-8580-ed7138f0cfb3", "name": "Join batches" }, { "parameters": { "content": "## Translate SRT\nTranslate the SRT lines in batches", "height": 496, "width": 868, "color": 4 }, "type": "n8n-nodes-base.stickyNote", "position": [ -5376, 2880 ], "typeVersion": 1, "id": "e02a2753-ad7d-412a-9db9-a50a2fec103a", "name": "Sticky Note" }, { "parameters": { "content": "## Parse SRT\nReturns SRT contents as a JSON array", "height": 240, "width": 384, "color": 5 }, "type": "n8n-nodes-base.stickyNote", "position": [ -5824, 2864 ], "typeVersion": 1, "id": "fee91d46-95f7-4117-8125-ae2463476f47", "name": "Sticky Note1" }, { "parameters": { "jsCode": "/**\n * N8N Code Box: SRT Subtitle Parser to JSON\n * Purpose: Parses SRT subtitle content and converts it to structured JSON format\n * Input: Items with 'file_content' property containing SRT formatted text\n * Output: Items with parsed subtitles array and count added to JSON\n * Throws: Error if no subtitles are found in the content\n */\n\n/**\n * Sanitizes subtitle text by replacing problematic characters\n * that can break JSON parsing or downstream processing\n */\nfunction sanitizeText(text) {\n return text\n // Curly/smart quotes \u2192 straight quotes\n .replace(/[\\u201C\\u201D\\u201E\\u201F\\u275D\\u275E]/g, '\"') // \" \" \u201e \u201f \u275d \u275e \u2192 \"\n .replace(/[\\u2018\\u2019\\u201A\\u201B\\u275B\\u275C]/g, \"'\") // ' ' \u201a \u201b \u275b \u275c \u2192 '\n // Dashes: em/en dash \u2192 hyphen\n .replace(/[\\u2013\\u2014]/g, '-')\n // Ellipsis character \u2192 three dots\n .replace(/\\u2026/g, '...')\n // Non-breaking space \u2192 regular space\n .replace(/\\u00A0/g, ' ')\n // Zero-width characters\n .replace(/[\\u200B\\u200C\\u200D\\uFEFF]/g, '')\n // Trim stray whitespace\n .trim();\n}\n\nfor (const item of $input.all()) {\n // Get SRT content and clean it\n let srtContent = item.json.file_content || '';\n \n // Remove BOM if present\n srtContent = srtContent.replace(/^\\uFEFF/, '');\n \n // Remove carriage returns and normalize line breaks\n srtContent = srtContent.replace(/\\r\\n/g, '\\n').replace(/\\r/g, '\\n');\n \n const subtitlesList = [];\n \n if (srtContent) {\n // Split into blocks by double line break\n const blocks = srtContent.split(/\\n\\s*\\n+/);\n \n for (const block of blocks) {\n if (!block.trim()) continue;\n \n // Split into lines and clean\n const lines = block.trim().split('\\n').map(line => line.trim()).filter(line => line);\n \n // Verify we have at least 3 lines (index, timestamp, text)\n if (lines.length < 3) continue;\n \n // Extract index\n const index = parseInt(lines[0]);\n if (isNaN(index)) continue;\n \n // Extract timestamps\n const timestampLine = lines[1];\n if (!timestampLine.includes('-->')) continue;\n \n const timeParts = timestampLine.split('-->');\n if (timeParts.length !== 2) continue;\n \n const startTime = timeParts[0].trim();\n const endTime = timeParts[1].trim();\n \n // Extract text (can be multiple lines) and sanitize\n const text = sanitizeText(lines.slice(2).join(' '));\n \n // Create subtitle object\n const subtitle = {\n index: index,\n start: startTime,\n end: endTime,\n text: text\n };\n \n subtitlesList.push(subtitle);\n }\n }\n \n // Throw error if no subtitles were parsed\n if (subtitlesList.length === 0) {\n throw new Error('No subtitles found in SRT content');\n }\n \n // Add parsed data to item's JSON\n item.json.subtitles = subtitlesList;\n item.json.subtitles_count = subtitlesList.length;\n \n // Remove file_content to free up memory\n delete item.json.file_content;\n}\nreturn $input.all();" }, "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ -5568, 2944 ], "id": "a7e7a690-6643-4bfa-a336-524b03892b06", "name": "Parse SRT", "onError": "continueErrorOutput" }, { "parameters": { "content": "## Generate SRT\nRetrieve the translated lines and creates a new SRT file", "height": 240, "width": 400, "color": 5 }, "type": "n8n-nodes-base.stickyNote", "position": [ -4464, 2848 ], "typeVersion": 1, "id": "d2215c6f-16c4-4630-ad7e-1ccae494b91d", "name": "Sticky Note2" }, { "parameters": { "jsCode": "/**\n * N8N Code Box: Original and Translated Subtitle Merger\n * Purpose: Merges original subtitles with translations based on index, preserving timing data\n * Input: Single item with 'subtitles' (original) and 'subtitles_translated' arrays\n * Output: Items with merged subtitles using original timing and translated text\n */\n\nconst results = [];\n\nfor (const item of $input.all()) {\n const originalSubtitles = item.json.subtitles || [];\n const translatedSubtitles = item.json.subtitles_translated || [];\n\n const translationsMap = {};\n translatedSubtitles.forEach(t => {\n translationsMap[t.index] = t.text;\n });\n\n const mergedSubtitles = originalSubtitles.map(subtitle => ({\n index: subtitle.index,\n start: subtitle.start,\n end: subtitle.end,\n text: translationsMap[subtitle.index] || subtitle.text\n }));\n\n results.push({\n json: {\n merged_subtitles: mergedSubtitles,\n target_lang: item.json.target_lang,\n srt_file: item.json.srt_file,\n total_subtitles: mergedSubtitles.length\n }\n });\n}\n\nreturn results;\n" }, "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ -4416, 2928 ], "id": "62730897-10c4-4530-a6c5-32c994210882", "name": "Merge Original and Translated Subtitles" }, { "parameters": { "jsCode": "/**\n * N8N Code Box: SRT File Generator from Merged Subtitles\n * Purpose: Converts merged subtitle data back to SRT format and creates binary file\n * Input: Items with 'merged_subtitles' array containing subtitle objects\n * Output: Items with SRT content as text and binary file, plus metadata (lines, size)\n */\n\n// Generate SRT file from merged subtitles\nfor (const item of $input.all()) {\n const mergedSubtitles = item.json.merged_subtitles || [];\n \n if (mergedSubtitles.length === 0) {\n item.json.srt_content = '';\n item.json.srt_lines = 0;\n // Remove merged_subtitles to free up memory\n delete item.json.merged_subtitles;\n continue;\n }\n \n // Sort by index to ensure correct order\n const sortedSubtitles = mergedSubtitles.sort((a, b) => a.index - b.index);\n \n // Generate SRT content\n const srtBlocks = [];\n \n for (const subtitle of sortedSubtitles) {\n // SRT format:\n // Subtitle number\n // start_timestamp --> end_timestamp\n // Subtitle text\n // Empty line\n \n const srtBlock = `${subtitle.index}\n${subtitle.start} --> ${subtitle.end}\n${subtitle.text}`;\n \n srtBlocks.push(srtBlock);\n }\n \n // Join blocks with double line break\n const srtContent = srtBlocks.join('\\n\\n');\n \n // Add SRT content to item\n // item.json.srt_content = srtContent;\n item.json.srt_lines = srtBlocks.length;\n item.json.srt_size = srtContent.length;\n \n // Create binary SRT file\n const originalFileName = item.json.srt_file.file_name || 'subtitles.srt';\n const targetLang = item.json.target_lang || 'translated';\n \n // Generate new filename: originalname.TARGET_LANG.srt\n const fileNameWithoutExt = originalFileName.replace(/\\.srt$/i, '');\n const newFileName = `${fileNameWithoutExt}.${targetLang}.srt`;\n \n // Convert to Base64 for binary storage\n const buffer = Buffer.from(srtContent, 'utf-8');\n const base64Content = buffer.toString('base64');\n \n // Add as binary file\n item.binary = item.binary || {};\n item.binary['translated_srt'] = {\n data: base64Content,\n fileName: newFileName,\n mimeType: 'text/plain'\n };\n \n // Remove merged_subtitles to free up memory\n delete item.json.merged_subtitles;\n}\nreturn $input.all();" }, "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ -4192, 2928 ], "id": "b418dd80-8342-41a7-a136-d553feaed2f8", "name": "Generate SRT file" }, { "parameters": { "workflowInputs": { "values": [ { "name": "srt_file", "type": "object" }, { "name": "target_lang" }, { "name": "source_lang" }, { "name": "binary_file_name" } ] } }, "type": "n8n-nodes-base.executeWorkflowTrigger", "typeVersion": 1.1, "position": [ -6224, 2944 ], "id": "30a5c581-8caf-4a12-8fea-b82a4eab6389", "name": "When Executed by Another Workflow" }, { "parameters": { "workflowId": { "__rl": true, "value": "={{ $workflow.id }}", "mode": "id", "cachedResultUrl": "/workflow/=%7B%7B%20$workflow.id%20%7D%7D" }, "workflowInputs": { "mappingMode": "defineBelow", "value": { "srt_file": "={{ $json.srt_file }}", "target_lang": "={{ $json.target_lang }}", "source_lang": "={{ $json.source_lang }}", "binary_file_name": "srt_file" }, "matchingColumns": [], "schema": [ { "id": "srt_file", "displayName": "srt_file", "required": false, "defaultMatch": false, "display": true, "canBeUsedToMatch": true, "type": "object", "removed": false }, { "id": "target_lang", "displayName": "target_lang", "required": false, "defaultMatch": false, "display": true, "canBeUsedToMatch": true, "type": "string", "removed": false }, { "id": "source_lang", "displayName": "source_lang", "required": false, "defaultMatch": false, "display": true, "canBeUsedToMatch": true, "type": "string", "removed": false }, { "id": "binary_file_name", "displayName": "binary_file_name", "required": false, "defaultMatch": false, "display": true, "canBeUsedToMatch": true, "type": "string", "removed": false } ], "attemptToConvertTypes": false, "convertFieldsToString": true }, "mode": "each", "options": { "waitForSubWorkflow": true } }, "type": "n8n-nodes-base.executeWorkflow", "typeVersion": 1.2, "position": [ -6000, 3248 ], "id": "90419f6b-f9fe-43f8-ba0b-0a222ee5d8de", "name": "Execute SRT Translate", "onError": "continueErrorOutput" }, { "parameters": { "operation": "completion", "respondWith": "returnBinary", "completionTitle": "Translation Complete \u2705", "completionMessage": "Your subtitle file has been successfully translated and is ready for download.", "inputDataFieldName": "translated_srt", "limitWaitTime": true, "resumeAmount": 5, "resumeUnit": "minutes", "options": {} }, "type": "n8n-nodes-base.form", "typeVersion": 1, "position": [ -5776, 3152 ], "id": "958e365a-2ef5-4856-a39c-64e5c511c50c", "name": "Form OK" }, { "parameters": { "operation": "completion", "completionTitle": "Translation Failed \u274c", "completionMessage": "There was an error processing your subtitle file. Please try again", "options": {} }, "type": "n8n-nodes-base.form", "typeVersion": 1, "position": [ -5776, 3344 ], "id": "b50c953b-3950-4eb5-aaee-ff0beab8c067", "name": "Form ERROR" }, { "parameters": { "conditions": { "options": { "caseSensitive": true, "leftValue": "", "typeValidation": "strict", "version": 2 }, "conditions": [ { "id": "4ff759d9-1b87-4861-9dbd-e9dabd0358eb", "leftValue": "={{ $json.total_subtitles }}", "rightValue": 0, "operator": { "type": "number", "operation": "gt" } }, { "id": "63467ef4-24f3-4129-a5ad-cf08214527cd", "leftValue": "={{ $json.srt_lines }}", "rightValue": "={{ $json.total_subtitles }}", "operator": { "type": "number", "operation": "equals" } } ], "combinator": "and" }, "options": {} }, "type": "n8n-nodes-base.if", "typeVersion": 2.2, "position": [ -4416, 3248 ], "id": "d959b077-4d57-4307-965a-cb8ea81bade3", "name": "Translation OK?" }, { "parameters": { "content": "### Return result\nOK - with file\nERROR - if something failed\n", "height": 336, "width": 384, "color": 2 }, "type": "n8n-nodes-base.stickyNote", "position": [ -4448, 3136 ], "typeVersion": 1, "id": "1b385e4f-1bde-4fab-86ba-316af82d8d7e", "name": "Sticky Note3" }, { "parameters": { "updates": [ "message" ], "additionalFields": { "download": true, "userIds": "1613101109" } }, "type": "n8n-nodes-base.telegramTrigger", "typeVersion": 1.2, "position": [ -6224, 3696 ], "id": "d6c61452-b415-48d9-b922-b40ca278b24c", "name": "Telegram Trigger", "credentials": { "telegramApi": { "name": "" } } }, { "parameters": { "chatId": "={{ $('Telegram Trigger').item.json.message.chat.id }}", "text": "=Oops \ud83d\ude05 Something went wrong.\nPlease try again with your .SRT file and target language.\n", "additionalFields": { "appendAttribution": false, "reply_to_message_id": "={{ $('Telegram Trigger').item.json.message.message_id }}" } }, "type": "n8n-nodes-base.telegram", "typeVersion": 1.2, "position": [ -4752, 3824 ], "id": "a45c9fd5-ff12-4186-9cd8-4b0516a2f1ce", "name": "Reply with error", "credentials": { "telegramApi": { "name": "" } } }, { "parameters": { "rules": { "values": [ { "conditions": { "options": { "caseSensitive": true, "leftValue": "", "typeValidation": "strict", "version": 2 }, "conditions": [ { "leftValue": "={{ $json.message.document }}", "rightValue": "", "operator": { "type": "object", "operation": "notExists", "singleValue": true }, "id": "f207c61b-d43f-41ae-8ff4-756809a9f96f" } ], "combinator": "and" }, "renameOutput": true, "outputKey": "NO File" }, { "conditions": { "options": { "caseSensitive": true, "leftValue": "", "typeValidation": "strict", "version": 2 }, "conditions": [ { "id": "d19f0484-1c91-4d19-84b1-c79bc21c29bd", "leftValue": "={{ $json.message.document.file_name.toLowerCase() }}", "rightValue": "srt", "operator": { "type": "string", "operation": "notEndsWith" } } ], "combinator": "and" }, "renameOutput": true, "outputKey": "File not a SRT" }, { "conditions": { "options": { "caseSensitive": true, "leftValue": "", "typeValidation": "strict", "version": 2 }, "conditions": [ { "id": "ee6b6cf3-5e43-4b83-9b06-e3e858e840bf", "leftValue": "={{ $json.message.caption }}", "rightValue": "", "operator": { "type": "string", "operation": "empty", "singleValue": true } } ], "combinator": "and" }, "renameOutput": true, "outputKey": "No target lang" } ] }, "options": { "fallbackOutput": "extra" } }, "type": "n8n-nodes-base.switch", "typeVersion": 3.2, "position": [ -6000, 3664 ], "id": "8b74a7a0-3cb2-4f99-8374-486f5d38ed31", "name": "Check Message File" }, { "parameters": { "operation": "sendDocument", "chatId": "={{ $('Telegram Trigger').item.json.message.chat.id }}", "binaryData": true, "binaryPropertyName": "translated_srt", "additionalFields": { "caption": "=File translated to {{ $json.target_lang }} \u2705", "reply_to_message_id": "={{ $('Telegram Trigger').item.json.message.message_id }}" } }, "type": "n8n-nodes-base.telegram", "typeVersion": 1.2, "position": [ -4976, 3712 ], "id": "cc176474-6e22-4024-8470-ee77afa61406", "name": "Send Translated SRT", "credentials": { "telegramApi": { "name": "" } }, "onError": "continueErrorOutput" }, { "parameters": { "text": "={{ $json.message.caption }}", "attributes": { "attributes": [ { "name": "target_lang", "description": "Target Language", "required": true }, { "name": "source_lang", "description": "Source Language" } ] }, "options": { "systemPromptTemplate": "=# Caption Language Extractor\n\n## Role\nYou are a language extraction parser. Extract translation intent from a Telegram caption and return a JSON object.\n\n## Extraction Rules\n- **target_lang** (mandatory): language to translate INTO. Normalize to full English name. If not found, return `\"unknown\"`.\n- **source_lang** (optional): language of the original subtitles, only if explicitly mentioned. If absent, return `\"\"`.\n\n## Output Format\nReturn ONLY valid JSON. No text outside it.\n```json\n{\"target_lang\": \"string\", \"source_lang\": \"string\"}\n```\n\n## Examples\n| Caption | target_lang | source_lang |\n|---|---|---|\n| `ES` | `\"Spanish\"` | `\"\"` |\n| `traduce a espa\u00f1ol` | `\"Spanish\"` | `\"\"` |\n| `from English to Spanish` | `\"Spanish\"` | `\"English\"` |\n| `traduce de ingl\u00e9s a espa\u00f1ol` | `\"Spanish\"` | `\"English\"` |" } }, "type": "@n8n/n8n-nodes-langchain.informationExtractor", "typeVersion": 1.2, "position": [ -5776, 3696 ], "id": "319a11e9-abee-4e02-8ffc-d4cda36c8a79", "name": "Extract Source & Target Lang", "alwaysOutputData": false }, { "parameters": { "chatId": "={{ $('Telegram Trigger').item.json.message.chat.id }}", "text": "=File received. Translating to '{{ $json.output.target_lang }}'... \u23f3", "additionalFields": { "appendAttribution": false, "disable_notification": true, "reply_to_message_id": "={{ $('Telegram Trigger').item.json.message.message_id }}" } }, "type": "n8n-nodes-base.telegram", "typeVersion": 1.2, "position": [ -5424, 3632 ], "id": "32621e68-9325-4597-b5bc-042a0c4791f1", "name": "Send 'In Progress' message", "credentials": { "telegramApi": { "name": "" } } }, { "parameters": { "schemaType": "manual", "inputSchema": "{\n \"json_schema\": {\n \"name\": \"translation_batch\",\n \"schema\": {\n \"type\": \"object\",\n \"properties\": {\n \"output\": {\n \"type\": \"array\",\n \"items\": {\n \"type\": \"object\",\n \"properties\": {\n \"index\": {\n \"type\": \"integer\"\n },\n \"text\": {\n \"type\": \"string\"\n }\n },\n \"required\": [\n \"index\",\n \"text\"\n ]\n }\n }\n },\n \"required\": [\n \"output\"\n ]\n }\n }\n}" }, "type": "@n8n/n8n-nodes-langchain.outputParserStructured", "typeVersion": 1.3, "position": [ -4960, 3200 ], "id": "7212ca16-59ae-4e8e-9517-bfc6102f4e43", "name": "SRT indexed array format", "onError": "continueRegularOutput", "notes": "Sample:\n\n[\n {\n \"index\": 1,\n \"text\": \"Este es un archivo SRT de ejemplo.\"\n },\n {\n \"index\": 2,\n \"text\": \"Este es un archivo SRT de ejemplo.\"\n }\n]" }, { "parameters": {}, "type": "n8n-nodes-base.noOp", "typeVersion": 1, "position": [ -4192, 3152 ], "id": "ebf9aca6-88c3-4e39-b52f-4b962c50fdf1", "name": "Return OK" }, { "parameters": { "errorMessage": " There was an error processing the subtitle file" }, "type": "n8n-nodes-base.stopAndError", "typeVersion": 1, "position": [ -4192, 3344 ], "id": "c745d72a-8267-478e-aa7d-b453e1d0f33b", "name": "Return ERROR" }, { "parameters": { "assignments": { "assignments": [ { "id": "10c0668b-1098-479f-806c-dcca01dc9f54", "name": "BATCH_SIZE", "value": 150, "type": "number" }, { "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890", "name": "LLM_PARALLEL_COUNT", "value": 10, "type": "number" } ] }, "includeOtherFields": true, "options": {} }, "type": "n8n-nodes-base.set", "typeVersion": 3.4, "position": [ -6016, 2944 ], "id": "c2c911de-3187-4fb0-8673-be7daa61d335", "name": "CONFIG" }, { "parameters": { "operation": "text", "binaryPropertyName": "={{ $json.binary_file_name }}", "destinationKey": "file_content", "options": { "encoding": "utf8", "stripBOM": true, "keepSource": "json" } }, "type": "n8n-nodes-base.extractFromFile", "typeVersion": 1.1, "position": [ -5792, 2944 ], "id": "eb29e1f8-2df8-43c1-baf3-ceb418bbaab1", "name": "Read file contents", "alwaysOutputData": true }, { "parameters": { "model": "openai/gpt-4.1-nano", "options": { "responseFormat": "json_object" } }, "type": "@n8n/n8n-nodes-langchain.lmChatOpenRouter", "typeVersion": 1, "position": [ -5296, 3216 ], "id": "6e530003-2fdc-42cc-b75b-1a84f717859b", "name": "OpenRouter - GPT 4.1 Nano", "credentials": { "openRouterApi": { "name": "" } } }, { "parameters": { "model": "google/gemini-2.5-flash-lite", "options": { "responseFormat": "json_object" } }, "type": "@n8n/n8n-nodes-langchain.lmChatOpenRouter", "typeVersion": 1, "position": [ -5168, 3248 ], "id": "d8c17d48-ea50-46a4-b215-ec2fc16a699f", "name": "OpenRouter - Gemini 2.5 Flash Lite", "credentials": { "openRouterApi": { "name": "" } } }, { "parameters": { "model": "google/gemini-2.5-flash-lite", "options": { "responseFormat": "json_object" } }, "type": "@n8n/n8n-nodes-langchain.lmChatOpenRouter", "typeVersion": 1, "position": [ -5776, 3904 ], "id": "5380a2af-4400-4e29-af68-156cdf484a18", "name": "OpenRouter - Gemini 2.5 Flash Lite (target extractor)", "credentials": { "openRouterApi": { "name": "" } } }, { "parameters": { "workflowId": { "__rl": true, "mode": "id", "value": "={{ $workflow.id }}", "cachedResultName": "={{ $workflow.id }}" }, "workflowInputs": { "mappingMode": "defineBelow", "value": { "srt_file": "={{ $json.message.document }}", "target_lang": "={{ $json.output.target_lang }}", "source_lang": "={{ $json.output.source_lang || 'auto-infer the source language' }}", "binary_file_name": "data" }, "matchingColumns": [], "schema": [ { "id": "srt_file", "displayName": "srt_file", "required": false, "defaultMatch": false, "display": true, "canBeUsedToMatch": true, "type": "object" }, { "id": "target_lang", "displayName": "target_lang", "required": false, "defaultMatch": false, "display": true, "canBeUsedToMatch": true, "type": "string" }, { "id": "source_lang", "displayName": "source_lang", "required": false, "defaultMatch": false, "display": true, "canBeUsedToMatch": true, "type": "string" }, { "id": "binary_file_name", "displayName": "binary_file_name", "required": false, "defaultMatch": false, "display": true, "canBeUsedToMatch": true, "type": "string" } ], "attemptToConvertTypes": false, "convertFieldsToString": true }, "options": { "waitForSubWorkflow": true } }, "type": "n8n-nodes-base.executeWorkflow", "typeVersion": 1.3, "position": [ -5200, 3808 ], "id": "19ba0f93-c088-435c-b9d9-bfa18832b275", "name": "Execute SRT Translate workflow", "alwaysOutputData": true, "onError": "continueErrorOutput" }, { "parameters": { "mode": "combine", "combineBy": "combineByPosition", "options": {} }, "type": "n8n-nodes-base.merge", "typeVersion": 3.2, "position": [ -4640, 2944 ], "id": "dc167dbf-0ead-40fe-8ef7-60a7823df5b8", "name": "Aggregate SRT lines" }, { "parameters": { "mode": "combine", "combineBy": "combineByPosition", "options": {} }, "type": "n8n-nodes-base.merge", "typeVersion": 3.2, "position": [ -5424, 3824 ], "id": "919ffbcf-6640-4ae7-8aca-a092148945f4", "name": "Recover context" }, { "parameters": { "promptType": "define", "text": "=INPUT -> {{ JSON.stringify($json.batch_subtitles.map(sub => ({ index: sub.index, text: sub.text }))) }}\n\n___", "hasOutputParser": true, "needsFallback": true, "messages": { "messageValues": [ { "message": "=# Professional Subtitle Translation System\n\n## Role\nYou are a professional audiovisual subtitle translator. Your sole task is to translate subtitle entries from '{{ $json.source_lang || 'english' }}' to '{{ $json.target_lang }}' with linguistic precision and narrative consistency.\n\n## Input Format\nA JSON array of subtitle entries, each containing:\n- `index`: sequential identifier (integer)\n- `text`: subtitle text to translate\n\n## Translation Rules\n\n### Rule 1 \u2014 Context-First Analysis\nBefore translating any entry, read the entire batch. Identify:\n- Character genders and relationships\n- Speaker identity and emotional tone\n- Technical terms, proper nouns, recurring vocabulary\n- Formality register (tuteo vs. usted, t\u00fa vs. vous, etc.)\n\nUse this context to resolve every ambiguity consistently across the batch.\n\n### Rule 2 \u2014 Language Handling\n- If a line is already in {{ $json.target_lang }}: return it unchanged\n- If a line is in a language other than {{ $json.source_lang || 'english' }} but identifiable: translate it to {{ $json.target_lang }}\n- If a line is in an unidentifiable language: return it unchanged\n- If a line is empty, whitespace-only, or contains only symbols/numbers: return it unchanged\n\n### Rule 3 \u2014 Translation Quality\n- PRESERVE: meaning, tone, style, punctuation, and capitalization patterns\n- PRESERVE: similar text length to respect subtitle timing constraints\n- ENSURE: natural, idiomatic flow in {{ $json.target_lang }}\n- APPLY: cultural adaptation only when literal translation would impede comprehension\n- MAINTAIN: all terminology and character name decisions consistently across the batch\n\n## Output Format\nReturn ONLY a valid JSON object. No explanations, no comments, no markdown, no text outside the JSON.\n```json\n{\n \"output\": [\n {\"index\": int, \"text\": \"string\"},\n ...\n ]\n}\n```\n\n### Constraints\n- MUST contain exactly the same number of entries as the input\n- MUST NOT add, remove, or reorder entries\n- MUST NOT include any content outside the JSON object\n\n## Example\n\n**Input:**\n```json\n[\n {\"index\": 47, \"text\": \"Maria walked into the room.\"},\n {\"index\": 48, \"text\": \"She looked tired.\"},\n {\"index\": 49, \"text\": \"Good morning, doctor.\"}\n]\n```\n\n**Output (English \u2192 Spanish):**\n```json\n{\n \"output\": [\n {\"index\": 47, \"text\": \"Mar\u00eda entr\u00f3 en la habitaci\u00f3n.\"},\n {\"index\": 48, \"text\": \"Se ve\u00eda cansada.\"},\n {\"index\": 49, \"text\": \"Buenos d\u00edas, doctora.\"}\n ]\n}\n```\n" } ] }, "batching": { "batchSize": "={{ $('CONFIG').item.json.LLM_PARALLEL_COUNT }}" } }, "type": "@n8n/n8n-nodes-langchain.chainLlm", "typeVersion": 1.7, "position": [ -5152, 2992 ], "id": "664ef063-b24f-4b0d-adcd-6cd5011524cf", "name": "Translate lines", "retryOnFail": true, "waitBetweenTries": 5000 }, { "parameters": { "chatId": "={{ $json.message.chat.id }}", "text": "=Hi \ud83d\udc4b Please send me: \n- Your .SRT file \n- The target language (e.g. English, French...) in the file description ", "additionalFields": { "appendAttribution": false, "disable_notification": true, "reply_to_message_id": "={{ $json.message.message_id }}" } }, "type": "n8n-nodes-base.telegram", "typeVersion": 1.2, "position": [ -5712, 3536 ], "id": "bad9382c-e4fe-4a3e-ae47-c8b31258c77d", "name": "Send instructions", "credentials": { "telegramApi": { "name": "" } } } ], "connections": { "On form submission": { "main": [ [ { "node": "Execute SRT Translate", "type": "main", "index": 0 } ] ] }, "Split in batches": { "main": [ [ { "node": "Translate lines", "type": "main", "index": 0 } ] ] }, "Join batches": { "main": [ [ { "node": "Aggregate SRT lines", "type": "main", "index": 1 } ] ] }, "Parse SRT": { "main": [ [ { "node": "Split in batches", "type": "main", "index": 0 }, { "node": "Aggregate SRT lines", "type": "main", "index": 0 } ], [ { "node": "Return ERROR", "type": "main", "index": 0 } ] ] }, "Merge Original and Translated Subtitles": { "main": [ [ { "node": "Generate SRT file", "type": "main", "index": 0 } ] ] }, "Generate SRT file": { "main": [ [ { "node": "Translation OK?", "type": "main", "index": 0 } ] ] }, "When Executed by Another Workflow": { "main": [ [ { "node": "CONFIG", "type": "main", "index": 0 } ] ] }, "Execute SRT Translate": { "main": [ [ { "node": "Form OK", "type": "main", "index": 0 } ], [ { "node": "Form ERROR", "type": "main", "index": 0 } ] ] }, "Translation OK?": { "main": [ [ { "node": "Return OK", "type": "main", "index": 0 } ], [ { "node": "Return ERROR", "type": "main", "index": 0 } ] ] }, "Telegram Trigger": { "main": [ [ { "node": "Check Message File", "type": "main", "index": 0 } ] ] }, "Check Message File": { "main": [ [ { "node": "Send instructions", "type": "main", "index": 0 } ], [ { "node": "Send instructions", "type": "main", "index": 0 } ], [ { "node": "Send instructions", "type": "main", "index": 0 } ], [ { "node": "Extract Source & Target Lang", "type": "main", "index": 0 }, { "node": "Recover context", "type": "main", "index": 1 } ] ] }, "Extract Source & Target Lang": { "main": [ [ { "node": "Send 'In Progress' message", "type": "main", "index": 0 }, { "node": "Recover context", "type": "main", "index": 0 } ] ] }, "SRT indexed array format": { "ai_outputParser": [ [ { "node": "Translate lines", "type": "ai_outputParser", "index": 0 } ] ] }, "CONFIG": { "main": [ [ { "node": "Read file contents", "type": "main", "index": 0 } ] ] }, "Read file contents": { "main": [ [ { "node": "Parse SRT", "type": "main", "index": 0 } ] ] }, "OpenRouter - GPT 4.1 Nano": { "ai_languageModel": [ [ { "node": "Translate lines", "type": "ai_languageModel", "index": 0 } ] ] }, "OpenRouter - Gemini 2.5 Flash Lite": { "ai_languageModel": [ [ { "node": "Translate lines", "type": "ai_languageModel", "index": 1 } ] ] }, "OpenRouter - Gemini 2.5 Flash Lite (target extractor)": { "ai_languageModel": [ [ { "node": "Extract Source & Target Lang", "type": "ai_languageModel", "index": 0 } ] ] }, "Execute SRT Translate workflow": { "main": [ [ { "node": "Send Translated SRT", "type": "main", "index": 0 } ], [ { "node": "Reply with error", "type": "main", "index": 0 } ] ] }, "Aggregate SRT lines": { "main": [ [ { "node": "Merge Original and Translated Subtitles", "type": "main", "index": 0 } ] ] }, "Send Translated SRT": { "main": [ [], [ { "node": "Reply with error", "type": "main", "index": 0 } ] ] }, "Recover context": { "main": [ [ { "node": "Execute SRT Translate workflow", "type": "main", "index": 0 } ] ] }, "Translate lines": { "main": [ [ { "node": "Join batches", "type": "main", "index": 0 } ] ] } }, "active": true, "settings": { "executionOrder": "v1", "binaryMode": "separate" }, "versionId": "0665c796-7d0d-442e-814c-856acbf20117", "id": "fdSpvUNx0vyf0kMJ", "tags": [ { "updatedAt": "2025-08-20T18:31:53.488Z", "createdAt": "2025-08-20T18:31:53.488Z", "id": "MYQWvz4yQohlX8Dp", "name": "telegram" }, { "updatedAt": "2025-08-15T08:45:03.140Z", "createdAt": "2025-08-15T08:45:03.140Z", "id": "iiq7yealSFabpVUg", "name": "ai" }, { "updatedAt": "2025-08-20T20:35:44.435Z", "createdAt": "2025-08-20T20:35:44.435Z", "id": "syw5irhKWlVWyLTC", "name": "utils" } ] }