HDR vs SDR: Why Does Phone Footage Look Wrong in My Edit?
HDR footage can look too bright, flat or oddly coloured when an editor interprets it incorrectly or when it is placed in an SDR sequence without a suitable conversion. HDR and SDR describe different ways of representing brightness and colour. If you are making a standard SDR delivery, tone mapping can help fit HDR values into the narrower output range. Adobe’s Premiere guide to HDR-to-SDR tone mapping explains how its system handles formats such as iPhone HLG in a Rec. 709 sequence.
HDR and SDR in plain language
HDR stands for high dynamic range. It can represent a wider range of brightness than standard dynamic range, or SDR. That can preserve bright highlights and shadow detail when the camera, editing workflow, export and playback display all support the relevant HDR format.
SDR remains common for everyday video delivery. A video made for an SDR sequence or export may use Rec. 709, a widely used SDR colour space. The issue is not that HDR footage is inherently wrong; it is that HDR source material and an SDR destination need to be interpreted and converted consistently.
What tone mapping does
Tone mapping adjusts a wider range of brightness so it can be shown in a narrower range. In an HDR-to-SDR workflow, this can help retain a natural-looking relationship between highlights, midtones and shadows instead of letting bright areas clip or appear harsh. Colour-management controls also affect how wide-gamut footage is interpreted and displayed.
The exact controls depend on the editing software and project settings. Adobe says Premiere can automatically tone map supported HDR footage, including iPhone HLG, when it is used in a Rec. 709 sequence. Other editors may use different defaults or expect you to select a colour space manually. Check the current documentation for your software and camera format.
Check the footage before changing the grade
If an HDR phone clip looks wrong, first check how the editor identifies the source colour space. Confirm that the sequence is intended for HDR or SDR delivery, then inspect the output colour-space setting. Avoid trying to correct a technical mismatch by pushing exposure or saturation sliders at random; those adjustments can make a later export harder to match.
Preview the result on a display that supports the intended output, but also check a short SDR export on a typical phone or computer screen. A timeline preview alone does not show how every app or platform will display the final file. If a client or platform specifies HDR or SDR delivery, follow that specification and retain a short test export before processing the full project.
Choose the delivery target first
Before you grade, decide whether the finished video needs to be HDR or SDR. If you need both, make separate exports from a properly managed project and review each one. Do not assume that every platform, screen or editing app will handle HDR in exactly the same way.
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