auxiliary_info_write  114 libavformat/movenccenc.c     ret = auxiliary_info_write(ctx, av_aes_ctr_get_iv(ctx->aes_ctr), AES_CTR_IV_SIZE);
auxiliary_info_write  126 libavformat/movenccenc.c     ret = auxiliary_info_write(ctx, (uint8_t*)&ctx->subsample_count, sizeof(ctx->subsample_count));