mp4ff_metadata_t tags;
} mp4ff_t;
+int32_t mp4ff_set_sample_position(mp4ff_t *f, const int32_t track, const int32_t sample);
int32_t mp4ff_total_tracks(const mp4ff_t *f);
void mp4ff_get_decoder_config(const mp4ff_t *f, const int track,
unsigned char** ppBuf, unsigned int* pBufSize);