Duck IVF: Difference between revisions
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(fill in the unknown fields according to libvpx's simple_encoder.c utility) |
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Line 7: | Line 7: | ||
bytes 0-3 signature: 'DKIF' | bytes 0-3 signature: 'DKIF' | ||
bytes 4-5 version (should be 0) | bytes 4-5 version (should be 0) | ||
bytes 6-7 | bytes 6-7 length of header in bytes | ||
bytes 8-11 codec FourCC (e.g., 'VP80') | bytes 8-11 codec FourCC (e.g., 'VP80') | ||
bytes 12-13 width in pixels | bytes 12-13 width in pixels | ||
bytes 14-15 height in pixels | bytes 14-15 height in pixels | ||
bytes 16-23 | bytes 16-19 frame rate | ||
bytes 20-23 time scale | |||
bytes 24-27 number of frames in file | bytes 24-27 number of frames in file | ||
bytes 28-31 | bytes 28-31 unused | ||
The header is followed by a series of frames. Each frame consists of a 12-byte header followed by data: | 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 0-3 size of frame in bytes (not including the 12-byte header) | ||
bytes 4 | bytes 4-11 64-bit presentation timestamp | ||
bytes 12.. frame data | bytes 12.. frame data | ||
[[Category:Container Formats]] | [[Category:Container Formats]] |
Revision as of 09:49, 21 May 2010
- Extension: ivf
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