What is the difference between image and video templates?

Image templates hold design / layout information - as would be required to render Images.

Video templates simply hold some extra instructions, telling Bannerbear what type of video to render.

The different video types are called Build Packs, of which there are 3:

1. Overlay a video with a static overlay
   
   • Requires an input_media_url in video or audio format
   • Accepts template modifications
   • Creates a video with a graphic overlay
2. Transcribe a video with auto-transcribed subtitles
   • Requires an input_media_url in video or audio format
   • Accepts template modifications
   • Automatically transcribes audio to text — supports 13 languages
   • Places transcribed text in a layer of your template
3. Multi Overlay a video with a slideshow overlay
   • Accepts an optional input_media_url in video or audio format
   • Accepts a set of frames
   • Accepts custom frame_durations
   • Creates a video with a series of graphic and text overlays