Gray blacks or crushed shadows across players can come from a mismatch between a video's sample range and how it is interpreted. Check that interpretation before adding contrast. Full and limited range are different mappings of video values, not quality rankings, and a wrong conversion can discard information that was still present.
Keep range separate from other color problems
First identify whether the footage is ordinary SDR or an HDR workflow requiring its own treatment. Also distinguish black-level clipping from a generally lighter midtone appearance. Range, transfer characteristics, color primaries and display behavior are separate variables; changing all of them at once makes the diagnosis uncertain.
FFmpeg's scale-filter documentation defines input and output range separately. For the documented eight-bit range conventions, full uses 0–255 and limited uses 16–235 for luma. These numbers explain the mapping; they are not instructions to force every file into one choice.
Compare a known test and the actual file
Keep the original export. Re-import it into the editor with its current interpretation and compare it with the timeline. Use a reviewed black-step or grayscale test through the same export path to see whether distinct near-black steps survive. A real dark coat is helpful content evidence, but it is not a calibrated test by itself.
Inspect the file's recorded range metadata where the workflow exposes it. Metadata can be absent or incorrect, so do not treat a label alone as proof of the pixels. Compare a controlled interpretation on a duplicate rather than overwriting the source.
A hypothetical dark interview scene
Suppose the editor shows separate folds in a black jacket. One player shows pale blacks, while another merges the folds into a flat dark shape. The producer compares the exported file inside the editor and checks a short grayscale sample before touching the grade.
If the file retains the steps under a correct interpretation, changing the entire grade may create damage elsewhere. If the encoded samples already lost the folds, a metadata-only change cannot recover them. This is a hypothetical decision tree, not a measured diagnosis of a specific player.
Make one reviewed correction
When evidence supports a range mismatch, correct interpretation or conversion at the appropriate stage in the actual editor. Avoid applying repeated expansions and compressions to successive exports. Recheck highlights, skin and gradients as well as black areas; a plausible black point can conceal clipped highlights.
Accept when the intended tonal distinctions survive in the target workflow and the file's declaration matches its values. Reject an arbitrary contrast boost chosen to please one uncontrolled player. Keep the original and document the correction. This is a final-media diagnosis outside generation, not an Imagild full-range quality switch or a promise that every display will appear identical.
Sources
Prepared by Imagild Editorial with AI assistance and reviewed against the linked sources on October 13, 2026. Examples are hypothetical; external procedures do not establish Imagild features or guarantee results.