component index 0: range of pixel count (width * height). component index 1: range of width. component index 2: range of height.
@note To obtain multi-component version of this structure, user must provide AV_OPT_MULTI_COMPONENT_RANGE to av_opt_query_ranges or av_opt_query_ranges_default function.
Multi-component range can be read as in following example:
@code int range_index, component_index; AVOptionRanges *ranges; AVOptionRange *range[3]; //may require more than 3 in the future. av_opt_query_ranges(&ranges, obj, key, AV_OPT_MULTI_COMPONENT_RANGE); for (range_index = 0; range_index < ranges->nb_ranges; range_index++) { for (component_index = 0; component_index < ranges->nb_components; component_index++) rangecomponent_index = ranges->range[ranges->nb_ranges * component_index + range_index]; //do something with range here. } av_opt_freep_ranges(&ranges); @endcode
Array of option ranges.
Most of option types use just one component. Following describes multi-component option types: