ff_formats_changeref  265 libavfilter/avfilter.c         ff_formats_changeref(&link->out_formats,
ff_formats_changeref  268 libavfilter/avfilter.c         ff_formats_changeref(&link->out_samplerates,
ff_formats_changeref  295 libavfilter/formats.h void ff_formats_changeref(AVFilterFormats **oldref, AVFilterFormats **newref);