gf_webvtt_isom_get_description 3693 include/gpac/internal/isomedia_dev.h GF_WebVTTSampleEntryBox *gf_webvtt_isom_get_description(GF_ISOFile *movie, u32 trackNumber, u32 descriptionIndex);
gf_webvtt_isom_get_description 1347 src/media_tools/webvtt.c 	wvtt = gf_webvtt_isom_get_description(file, track, index);