Get the name of an AVFilterPad.
@param pads an array of AVFilterPads @param pad_idx index of the pad in the array it; is the caller's responsibility to ensure the index is valid
@return name of the pad_idx'th pad in pads
See Implementation
Get the name of an AVFilterPad.
@param pads an array of AVFilterPads @param pad_idx index of the pad in the array it; is the caller's responsibility to ensure the index is valid
@return name of the pad_idx'th pad in pads