Reduce costs
Lower bandwidth and storage expenses without compromising quality.
Extract Audio Track
Submit your video via API. Qencode isolates the audio stream from your video file.
Speech-to-Text
Generate subtitles in 70+ languages from any video or audio file.
Overview
What It Is
Speech-to-Text converts audio content in your videos into searchable, timestamped text transcriptions. Qencode's automatic speech recognition (ASR) model transcribes dialogue, narration, and audio in 70+ languages with high accuracy. The API returns subtitle-ready timing data, enabling instant subtitle generation for accessibility, searchability, and engagement without manual transcription labor.
Coming Soon
Process
How It Works
Recognize Speech
ASR models transcribe dialogue and audio content with timing data in 70+ languages.
Generate Transcript
Produce a searchable, timestamped text version of all spoken content.
Format for Subtitles
Structure output as VTT or SRT subtitle files with frame-accurate timing.
Return or Deliver
Provide subtitle files ready to embed or deliver alongside your video.
Overview
Why Speech-to-Text
Save time
Automate complex processing that would take hours manually.
Scale effortlessly
Handle thousands of videos with the same API call.
Integrate in minutes
Simple REST API with comprehensive SDKs and documentation.
Use Cases
Who Uses Speech-to-Text
EdTech
ScenarioAn online learning platform hosts hundreds of course videos in different languages. Creating subtitles for each video manually is expensive and time-consuming.
Auto-generate accurate subtitles in 70+ languages, making courses accessible to global students and reducing transcription costs by 90%.
Enterprise
ScenarioA corporate training department records video content for internal use. Employees in different regions need subtitles for clarity and accessibility compliance.
Create subtitles automatically for every training video, meeting accessibility requirements and improving comprehension by 25% across offices.
VOD Platforms
ScenarioA streaming service must subtitle international content and user-generated videos. Manual transcription delays content launch and limits accessibility.
Automatically generate subtitles on upload, accelerating time-to-market by 50% and ensuring every video meets accessibility standards.
Tutorial
How to Use Speech-to-Text
Tutorial Video Coming Soon
For Developers
Technical Reference
| API Method | POST /v1/start_encode2 with output: "speech_to_text" after creating a task with /v1/create_task. |
| Key Parameters | source, encoder_version: "2", output: "speech_to_text", mode. Available modes: accuracy, balanced, speed. Optional STT params: language, translate_languages, transcript, transcript_name, json, json_name, srt, srt_name, vtt, vtt_name, start_time, duration, destination.url, isolate_voice, separate_speakers, word_level_timestamps. |
| Supported Input Formats | Any supported audio or video input format. Source can be a video URL, direct upload ID, Google Drive/Dropbox share link, or other supported audio/video input. |
| Supported Languages | 70+ source languages with auto-detection. Use optional language with ISO 639-1 codes, such as en, es, or uk, to force the source language. |
| STT Modes | accuracy for higher accuracy, balanced for a balance between speed and accuracy, and speed for faster, lower-cost transcription. |
| Output Formats | TXT transcript, JSON with timestamps, SRT subtitles, and VTT subtitles. Default file names include transcript.txt, timestamps.json, subtitles.srt, and subtitles.vtt. |
| Limits & Constraints | translate_languages supports up to 15 target languages per job. Use start_time and duration to process only a segment. By default, transcript, JSON, SRT, and VTT outputs are enabled; set output params to 0 to disable specific files. |
Request Example
Produces Speech-to-Text output JSON
{
"query": {
"source": "https://your-storage.com/source.mov",
"encoder_version": "2",
"format": [
{
"output": "speech_to_text",
"transcript": 1,
"json": 1,
"srt": 1,
"vtt": 1,
"mode": "accuracy",
"language": "en"
}
]
}
}Copy this payload and use it with your API key to test Speech-to-Text on your own video.
View Speech-to-Text TutorialPricing
What It Costs
Usage-Based Pricing
Speech-to-Text functionality is available to all Qencode users. Pricing is based on the number of minutes processed and the Mode selected.
Explore More
Related Features
Translations
Translate generated subtitles to any language automatically
Subtitles & Captions
Advanced subtitle styling, positioning, and formatting
Dubbing
Auto-generate voiceovers in different languages from original audio
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Please send us a message if you have a question or Schedule a call for a demo to discuss your integration.
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