FF_API_AVFILTER_OPEN  694 libavfilter/avfilter.c #if FF_API_AVFILTER_OPEN
FF_API_AVFILTER_OPEN 1024 libavfilter/avfilter.h #if FF_API_AVFILTER_OPEN
FF_API_AVFILTER_OPEN 1279 libavfilter/avfilter.h #if FF_API_AVFILTER_OPEN
FF_API_AVFILTER_OPEN  127 libavfilter/avfiltergraph.c #if FF_API_AVFILTER_OPEN
FF_API_AVFILTER_OPEN   64 libavfilter/version.h #ifndef FF_API_AVFILTER_OPEN