I want to take A screenshot from the original video, in thedeepstream_test5_app_main.c file generate_event_msg_meta method, please give me a code.
Screenshot (generally this means to capture all things on the screen including icons, desktop, bars,…) is not a function of deepstream. You need to refer to your operation system API to know how to capture screenshot.
If you just want to capture a image from the video, there is no such implementation inside deepstream-test5 sample. There is open source jpeg encoder plugin in Gstreamer project, you use them to capture picture as you like. jpegenc: GStreamer Good Plugins 1.0 Plugins Reference Manual
i want to capture a image from the original video ,can you give me a code?
This is basic gstreamer application development. You can google for the samples. Your first application (gstreamer.freedesktop.org)
It is required to be familiar with gstreamer before you start with DeepStream SDK.