The technology for converting the audio tracks of video via speech recognition to plain text indexed to time-code has been around for a while.

其实，把视频里的音轨用语音识别转化成文字索引并时间编码的技术已经有了。

youdao

We do provide a very large number of audio tracks.

我们确实已经提供了非常大量的音频给大家。

youdao

RTP over UDP is used to transport the encoded video or audio tracks (or other types of tracks).

UDP是用来传输编码的视频或音频轨道(或其他类型的音轨)。

youdao

It also packs full smartphone connectivity with the ability to stream audio tracks from the Web via Pandora Internet radio and Stitcher SmartRadio.

FORBES: 2012 Buick Verano Starts at $23,470

The music note icon in the bottom left corner of every page makes it easy to control audio tracks from anywhere in Flipboard.

ENGADGET: Flipboard brings the noise in NPR-ified app update, Britta will be pleased

Tunecore, CD Baby and other music aggregators ingest audio tracks and populate them on music stores and subscription services and administer royalty payments.

FORBES: Game Developers Power-Up their Marketing Weapons