Preset selection determines the trade-off between encoding speed and encoded quality at a given bitrate. The right preset depends on your encoder choice from earlier in this module.

For NVENC H.264 and NVENC HEVC, the calibrated preset is "P5 Slow" or equivalent in current OBS naming (the preset names have shifted across OBS versions). The P5 Slow preset uses the GPU's encoding hardware at a moderate speed setting that produces noticeably better image quality than the faster presets without adding meaningful latency.

For x264 (CPU encoding), the calibrated preset is "veryfast." Slower presets produce better-looking streams but consume CPU at a level that risks frame drops during complex scenes. The veryfast preset is the calibrated balance.

The implementation: in encoder settings, find the preset field, select the right value for your encoder. Save. The setting persists.

Do not confuse encoding preset with stream profile (next lesson). The preset controls encoder speed-versus-quality. The profile controls compatibility with viewer-side decoders.