How to transcribe audio and video files to text with one API call (MP3, MP4, Google Drive, Dropbox)

说明与用途

通过单个 API 调用实现音频和视频文件的自动转录，整合音频提取、分块、共享链接处理，并返回文本和 SRT。

问题

Transcribing large or remote audio/video files is cumbersome due to size limits, format requirements, and share‑link handling.

结果

A 50‑minute MP3 from Dropbox was transcribed in ~40 s for $0.15 (≈$0.003 per minute).

工作流

• Provide file URLs (direct or share links) or upload a file
• API extracts audio from video if needed
• Splits large files into 10‑minute chunks
• Transcribes each chunk with Whisper large‑v3
• Adjusts timestamps for each chunk
• Combines text and segments
• Returns JSON with status, fileName, language, duration, text, segments, and optional SRT

证据

A 50-minute MP3 shared through Dropbox was transcribed in about 40 seconds and cost $0.15.

来源

Whisper wants audio. Pull the audio track out with ffmpeg first, and shrink it while you are there, since speech models work on 16 kHz mono anyway:

来源

A Google Drive or Dropbox share link opens a preview page, not the file. You need the direct-download form:

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