What is a .MP4 file?
MP4 is the most common video container, widely supported and usually holding H.264 video with AAC audio.
- Did you know
- MP4 was standardised in 2001, based on Apple’s QuickTime format.
- MP4 is formally MPEG-4 Part 14, standardised as ISO/IEC 14496-14 and derived from the ISO base media file format.
- The ISO base media file format underlying MP4 is itself built directly on Apple’s QuickTime container.
- An MP4 file is a series of nested “boxes”, also called “atoms”, each describing or holding a piece of the media.
- On the web a .MP4 file is served with the MIME type
video/mp4.
- What Analyser shows you
- Read the container, codec, resolution, and frame rate of MP4, MOV, MKV, AVI, and WebM video, step through frames, and extract the audio track. Raw H.264/H.265 elementary streams (.h264/.265) are remuxed to MP4 in-browser so they play too.
- Open a .MP4 file
- Drag a .MP4 file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.