Video scale converter

Purpose and scope are to enable accurate calculation of scaled video resolutions from a given source. The tool accepts original_width, original_height and either a scale_factor or target_width/target_height, and returns output_width, output_height, and an aspect summary. It conceptually separates input validation, mathematical scaling, and result normalization. Benefits accrue to editors, post houses, and streaming teams who need deterministic export dimensions for presets, encodes, and delivery specs. Unique value lies in clear handling of aspect preservation, rounding to pixel boundaries, and explicit defaults for conflicting inputs. Core features include factor-based scaling, dimension-target scaling with preserve_aspect control, and integer outputs with tolerance reporting. Use cases include preparing multiple export sizes from a master 4K source, ensuring consistent aspect across devices, and aligning with platform encoder limits. This tool avoids color, frame-rate, or codec decisions and focuses on geometric scaling logic and reliability for downstream pipelines.