Function avfilter_graph_segment_link

pub unsafe extern "C" fn avfilter_graph_segment_link(
    seg: *mut AVFilterGraphSegment,
    flags: i32,
    inputs: *mut *mut AVFilterInOut,
    outputs: *mut *mut AVFilterInOut,
) -> i32

Link filters in a graph segment.

Walk through all filter instances in the graph segment and try to link all unlinked input and output pads. Any creation-pending filters (see avfilter_graph_segment_create_filters()) present in the segment will cause this function to fail. Disabled filters and already linked pads are skipped.

Every filter output pad that has a corresponding AVFilterPadParams with a non-NULL label is

• linked to the input with the matching label, if one exists;
• exported in the outputs linked list otherwise, with the label preserved. Unlabeled outputs are
• linked to the first unlinked unlabeled input in the next non-disabled filter in the chain, if one exists
• exported in the ouputs linked list otherwise, with NULL label

Similarly, unlinked input pads are exported in the inputs linked list.

@param seg the filtergraph segment to process @param flags reserved for future use, caller must set to 0 for now @param[out] inputs a linked list of all free (unlinked) inputs of the filters in this graph segment will be returned here. It is to be freed by the caller using avfilter_inout_free(). @param[out] outputs a linked list of all free (unlinked) outputs of the filters in this graph segment will be returned here. It is to be freed by the caller using avfilter_inout_free().

@retval “non-negative number” success @retval “negative error code” failure

@note Calling this function multiple times is safe, as it is idempotent.