: You can add text bubbles that follow motion using Final Cut Pro X .
: Use FFmpeg to embed or extract 708 caption data from an MP4 file. g7084.mp4
: Convert standard caption files (like .srt or .vtt) into the 708 format for broadcast or professional delivery. 3. Adding Text Overlays If you want to add text inside the video: : You can add text bubbles that follow
: If you are editing, you can use Edit > Transcribe to Captions to generate text from audio. 2. CEA-708 Captioning (Digital Captions) g7084.mp4
: You can hardcode subtitles onto an MP4 using MP4Box or similar command-line tools.