Application of mediastreamer2 and GStreamer in embedded field

Streaming media means through the Internet or USB A complete set of multimedia framework technology for real-time playing and recording video through such interfaces . The specific implementation of this kind of framework is gstreamer、ffmpeg、mediastreamer2（ The bottom layer can call ffmpeg） etc. , Or a set of private frameworks implemented by ourselves .

mediastreamer2 and gstreamer Are two frameworks commonly used in the industry . As an embedded software engineer, my main concern is porting （ Especially the interface with the bottom layer ）、 Use .mediastreamer2 and gstreamer Ontology migration is not difficult, just follow the tutorial embedded compilation , The difficult thing is to interface with the underlying .mediastreamer2 and gstreamer Through one by one filter String them together to form a graph or pipeline. The difficulty is to realize each filter, In order to improve the efficiency of encoding and decoding, many resources are needed filter Hardware required , therefore filter Interface implementation with the underlying layer is particularly important , Of course, this part of the work generally needs SOC The factory implementation is because they know how to interact with the bottom layer with the highest efficiency .

If not in SOC The original factory is engaged in embedded software development mediastreamer2 and gstreamer The main work of is to call the two frameworks to implement the application .mediastreamer2 Generally, interface functions are used , and gstremer It uses instructions or interface functions .