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Protocol basics
RTSP controls a media session; the negotiated media transport carries the video. Distinguishing control, credentials and media helps explain why a connection can succeed without a visible picture.
↗Protocol basics
ONVIF specifies interoperable services and profiles, not a promise that every optional feature exists. Check device version, advertised capabilities and permissions for the operation you need.
↗Protocol basics
Resolution describes image dimensions; codec describes how video is encoded. High resolution does not establish H.265 support, and codec availability must be checked along the whole playback path.
↗Protocol basics
These three settings affect different parts of image detail, motion and load. Change one at a time and measure the moving scene rather than treating a bigger number as universally better.
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