DPX, which stands for Digital Picture Exchange, is a file format primarily used in the professional film and television industry for storing individual frames of a motion picture film or video sequence. Developed by SMPTE (Society of Motion Picture and Television Engineers) as standard SMPTE 268M-2003, it is a cornerstone of the digital intermediate (DI) workflow. DPX files are designed to preserve the highest possible image quality from film scans or high-end digital cinema cameras, often storing images in an uncompressed or lightly compressed state with high bit depths (e.g., 10-bit or 12-bit logarithmic or linear color spaces). This capability ensures that the full dynamic range and color information captured from the original source are retained, making DPX ideal for critical post-production tasks such as color grading, visual effects, and long-term archiving. A typical DPX sequence consists of numerous individual DPX files, each representing a single frame, named sequentially (e.g., 'shot_001.00000.dpx', 'shot_001.00001.dpx'). The format also incorporates extensive metadata fields, allowing for the storage of crucial information like timecode, keycode, film roll and frame numbers, camera settings, and color space details, which are vital for maintaining consistency and tracking assets throughout complex production pipelines. Despite the large file sizes associated with their uncompressed nature, DPX files are indispensable for their fidelity and robustness in professional film and video production.