Difference between revisions of "IVF"

From MultimediaWiki
Jump to navigation Jump to search
(add samples link)
(update location for the test vectors)
Line 1: Line 1:
 
* Extension: ivf
 
* Extension: ivf
* Samples: The test-vectors-* archives available here: http://code.google.com/p/webm/downloads/list
+
* Samples: The test-vectors-* archives available here: https://chromium.googlesource.com/webm/vp8-test-vectors
  
 
IVF is a simple file format that transports raw VP8 data.
 
IVF is a simple file format that transports raw VP8 data.

Revision as of 08:19, 23 August 2016

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 16-19  frame rate
bytes 20-23  time scale
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