Translating any podcast episode for about a dollar: the architecture, and the one rule that shaped it

说明与用途

一种工作流，利用已发布的 <podcast:transcript> 标签，将播客翻译为单一语音的音频文件，使用托管的机器翻译和语音合成服务，费用约一美元，时延约93秒，并在使用前提供明确报价。

问题

A user wants to share a non‑English podcast episode with a friend who doesn’t speak English, but a summary or transcript alone is insufficient for listening.

结果

The system delivers a translated podcast audio file for about a dollar, with a 93‑second turnaround, and guarantees no surprise costs by quoting the price before any paid API calls.

工作流

• Detect <podcast:transcript> in RSS feed
• If missing, refuse the request
• Fetch the podcaster’s published transcript
• Translate the transcript per character using a managed MT service
• Synthesize the translated text per character with a managed neural TTS voice
• Stitch the TTS audio into a single playable file
• Store the file in the requester’s household library

证据

The obvious architecture is: transcribe the audio with speech‑to‑text, translate that, narrate the result. I deliberately did not do that...

来源

One episode of a (faintly ridiculous) British royal‑gossip podcast that happened to be in my test feed — 8,570 characters of transcript, English to German — landed at 90 cents.

来源

A 9‑minute episode, translated, narrated, and assembled into a playable file, in 93 seconds.

来源