Method and device for code stream transfer on basis of open network video interface forum (ONVIF) protocol

Abstract

The invention provides a method and device for code stream transfer on the basis of the open network video interface forum (ONVIF) protocol. The method and the device are applied to a media forwarding server. The method comprises the steps of receiving RTSP DESCRIBE answering messages of a coding end in the RTSP negotiation process, obtaining decoding parameters PPS / SPS from the messages, and storing corresponding relations of the decoding parameters and the coding end; when receiving code stream data of the coding end, judging whether the decoding parameters exist in front of a first frame first packet in the code stream data; if the decoding parameters do not exist in front of the first frame first packet in the code stream data, querying the decoding parameters corresponding to the coding end, performing encapsulation treatment on the decoding parameters, adding the decoding parameters to the front of the first frame first packet, and modifying serial numbers of the first frame first packet and follow-up data packets; and performing no treatment if the decoding parameters exist in front of the first frame first packet in the code stream data. According to the method and the device for code stream transfer, standardization of code streams is achieved, what a decoding end receives is all standard code streams, and accordingly various networking schemes are supported to the largest extent and the requirements of interconnection of video products are met.

Description

technical field [0001] The invention relates to the field of streaming media, in particular to an ONVIF protocol-based code stream conversion method and device. Background technique [0002] With the full-speed development of the security industry, ONVIF has received high attention in recent years, and various manufacturers have supported the ONVIF protocol for interconnection. In any kind of networking, the decoding end needs to know the decoding parameters PPS (Picture Parameter Sets, picture parameter set) and SPS (Sequence Parameter Sets, sequence parameter set) of the code stream in order to be able to decode the code stream. The ONVIF protocol defines that the decoding parameters of the code stream can be carried in the DESCRIBE response message negotiated by RTSP, or in the H.264 code stream, or both. [0003] Different manufacturers have different implementations. Some manufacturers do not carry the decoding parameters in the code stream, but only carry them in the ...

AI Technical Summary

Problems solved by technology

This method is a private definition of the extension field, which requires the decoder to parse the parameters in these fields according to a certain agreement, so it is not universal

In addition, the code stream type Payload Type that needs to be used for decoding also needs to be carried in the RTP extension field. Since different manufacturers may define different Payload Types, the decoder needs to parse this parameter according to the agreement, so there are also non-universal question

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