Video FPS Converter

This tool computes how long a video will play when its frame rate is changed. By supplying the source FPS, the target FPS, and either the original duration or the original frame count, it outputs the new duration and, if applicable, the new frame count. Conceptually, duration scales with the FPS ratio r = source_fps / target_fps, so new_duration = duration * r. If the input is expressed as frames, the corresponding new frame count is frames * (target_fps / source_fps). The tool accommodates common FPS values used in film and video production and handles edge cases such as non-integer FPS and very long durations. Beneficiaries include editors delivering to different platforms, colorists coordinating timelines, and students analyzing timing implications of FPS changes. Unique value lies in providing instant, auditable timing estimates without re-encoding, reducing trial-and-error cycles. Core features include input validation, dual input modes (duration or frame count), precise two-decimal-duration output, and an explicit cross-check when both duration and frame count are supplied. Use cases include converting a 120-second clip from 24 fps to 30 fps, resulting in a new duration of 120 * (24/30) = 96.00 seconds, or deriving the required frames for a fixed duration at 60 fps. This supports planning for broadcast, streaming, and archival workflows where delivery specs depend on FPS.