: Specifies the inputs so that the ASH video player will switch between them dynamically based on network conditions.

-map 0 -map 1 -map 2 -map 3: Includes all video (0, 1, 2) and audio (3) in the final manifest.

-adaptation_sets: Groups streams into adaptation sets:

The resulting MPD file (input_video_manifest.mpd) describes the streams and enables adaptive bitrate streaming in MPEG-DASH.

After completing these steps, you’ll have: