Contains one index entry for an AVI 2.0 standard index. This structure is contained in the AVISTDINDEX structure.
The offset, in bytes, to the start of the data. The offset is relative to the value of the qwBaseOffset member of the AVISTDINDEX. The value is the offset of the actual audio/video data in the chunk, not the offset of the start of the chunk.
The lower 31 bits contain the size of the data. The high bit is set to 1 if the frame is delta frame, or zero otherwise.
For more information, see the OpenDML AVI File Format Extensions, published by the OpenDML AVI M-JPEG File Format Subcommittee. (This resource may not be available in some languages and countries.)