Multi-path RTSP video real-time display method and system

By employing a multi-channel RTSP video real-time display system on an embedded platform, utilizing hardware decoding and zero-copy transmission technology, and combining OpenGL and QML rendering pipelines, the problems of high CPU usage and large rendering latency in existing multi-channel RTSP video displays are solved, achieving low-latency, high-efficiency, and stable multi-channel video display.

CN121940387APending Publication Date: 2026-04-28ZHENGZHOU HENGDA INTELLIGENT CONTROL TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-23
Publication Date
2026-04-28

AI Technical Summary

Technical Problem

Existing multi-channel RTSP video real-time display systems on embedded platforms suffer from problems such as high CPU usage, large rendering latency, multi-level copying of video frames, difficulty in connecting hardware decoding and rendering frameworks, and instability in multi-channel rendering, making it difficult to meet the requirements of multi-channel high-definition, low-latency, low-power, and highly stable display.

Method used

The system employs a multi-channel RTSP video real-time display system, which includes a video receiving module, a hardware decoding module, a GPU rendering module, and a rendering adaptation module. It receives multiple RTSP video streams in parallel, performs hardware decoding using hardware decoders such as MPP video decoding accelerators, and achieves zero-copy transmission using DMA-BUF and EGLImage technologies. It also seamlessly integrates OpenGL rendering pipeline and QML rendering pipeline.

Benefits of technology

It achieves low-latency, high-efficiency rendering and stable display of multiple video streams, reduces CPU computing burden, improves rendering efficiency, ensures the order of video streams and system stability, and is suitable for multi-channel video display scenarios such as mining, industrial monitoring and security.

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Abstract

The invention relates to a multi-channel RTSP video real-time display method and system. The system comprises a video receiving module, a hardware decoding module, a GPU rendering module and a rendering adaptation module. The video receiving module is used for receiving multiple paths of RTSP video streams in parallel and extracting coded video data corresponding to each path of RTSP video stream; the hardware decoding module is used for carrying out hard decoding on each path of coded video data, and each decoded video frame after decoding is output in the form of a dma-buf file descriptor; the GPU rendering module is used for processing each frame of dma-buf file descriptor through a GPU and generating an OpenGL texture, all the OpenGL textures corresponding to each path of coded video data are rendered through a pre-configured OpenGL rendering pipeline, and a GPU rendering result is output; and the rendering adaptation module is used for introducing each GPU rendering result into a QML rendering pipeline and displaying the result in real time through a QML control. According to the invention, the processing process of the plurality of video streams is efficient and stable.
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