Duck IVF: Difference between revisions

From MultimediaWiki
Jump to navigation Jump to search
(Improve the ivf time-base description)
(found a Shantae game that uses this format)
Line 25: Line 25:
== PC games using IFV files ==
== PC games using IFV files ==

* Rogue Trooper Redux
* [ Rogue Trooper Redux]
* [ Shantae and the Seven Sirens]

[[Category:Container Formats]]
[[Category:Container Formats]]

Revision as of 17:03, 1 June 2020

IVF is a simple file format that transports raw VP8 data.

Multi-byte numbers of little-endian. An IVF file begins with a 32-byte header:

bytes 0-3    signature: 'DKIF'
bytes 4-5    version (should be 0)
bytes 6-7    length of header in bytes
bytes 8-11   codec FourCC (e.g., 'VP80')
bytes 12-13  width in pixels
bytes 14-15  height in pixels
bytes 16-23  time base denominator
bytes 20-23  time base numerator
bytes 24-27  number of frames in file
bytes 28-31  unused

The header is followed by a series of frames. Each frame consists of a 12-byte header followed by data:

bytes 0-3    size of frame in bytes (not including the 12-byte header)
bytes 4-11   64-bit presentation timestamp
bytes 12..   frame data

PC games using IFV files