View source for Harrow Media VDO

* Samples: {{DexvertSamples|video/vdoVideo}}

Company: Harrow Media
Extension: vdo

This is a simple RLE-based animation format used in their promotional game.

File starts with the following header (all values are little-endian):
  "Artform\0"
  16-bit version (0 or 1)
  16-bit width
  16-bit height
  16-bit unknown (usually zero)
  768-byte palette

Then frame data with the following header follows:
  16-bit x offset
  16-bit y offset
  16-bit current frame width
  16-bit current frame height
  32-bit unknown
  32-bit frame size

Frame data is split into line data, each one starting with 16-bit size and with the following RLE scheme: each opcode has length stored in its low six bits and actual operation in top two bits (00 = run, 01 = copy, 10 = skip, 11 = ???).

Some empty frames may be coded with x offset equal to full width and current frame width being negative full width (and the same applies to height) as well as size being zero.

[[Category:Game Formats]]
[[Category:Video Codecs]]