offset = 0x68 + ast->nb_index_entries * 16;
for (i = 0; i < ast->nb_index_entries; i++) {
AVIndexEntry *e = ast->index_entries + i;
offset = 0x68 + ast->nb_index_entries * 16;
for (i = 0; i < ast->nb_index_entries; i++) {
AVIndexEntry *e = ast->index_entries + i;