Dash_480.mp4 -

: The "480" in DASH_480.mp4 indicates the vertical resolution. Your player automatically switches between DASH_240 , DASH_480 , DASH_720 , and DASH_1080 based on your current internet speed.

Are you looking to a specific video, or are you trying to configure a media player to use this specific resolution?

: ffmpeg -i DASH_480.mp4 -i audio.mp4 -c copy -map 0:v:0 -map 1:a:0 output.mp4 DASH_480.mp4

: Tools like Video DownloadHelper can detect the various DASH streams and allow you to select your preferred resolution.

DASH is an adaptive bitrate streaming technique that allows high-quality streaming of media content over the Internet delivered from conventional HTTP web servers. : The "480" in DASH_480

If you already have a silent DASH_480.mp4 file and a separate audio file, you can merge them without re-encoding using FFmpeg .

: If a DASH segment is missing or the internet drops during the handshake, the video may freeze. Clearing your browser cache or app data usually resolves this. : ffmpeg -i DASH_480

: Some third-party mobile apps have "Data Saver" modes that force the player to fetch DASH_480.mp4 instead of higher resolutions to save bandwidth.