G7084.mp4 -

: You can hardcode subtitles onto an MP4 using MP4Box or similar command-line tools.

: You can add text bubbles that follow motion using Final Cut Pro X .

: If you are editing, you can use Edit > Transcribe to Captions to generate text from audio. 2. CEA-708 Captioning (Digital Captions) g7084.mp4

If you have a video and need to extract the spoken words into a text document, you can use several tools:

: Use FFmpeg to embed or extract 708 caption data from an MP4 file. : You can hardcode subtitles onto an MP4

Knowing if you need a transcript , subtitles , or on-screen text will help me give you a better answer. Add TRACKED TEXT MESSAGE Animations in FINAL CUT PRO

If "g7084" refers to (the standard for digital closed captioning in the US and Canada), you might be trying to: Add TRACKED TEXT MESSAGE Animations in FINAL CUT

: Tools like GGLOT or Descript can automatically convert MP4 audio into a transcript.