gstreamer

I want to add some opencv processes to a gstreamer pipeline and then send it over udpsink. I'm able to read frames from gstreamer like this: // may add some plugins to the pipeline later cv::VideoCapture cap("v4l2src ! video/x-raw, framerate=30/1, width=640, height=480, format=RGB ! videoconvert ! appsink"); cv::Mat frame; while(ture){ cap >> frame; // do some processing to the frame } But what can't figure out is how to pass the processed frame to the following pipeline: appsrc ! x264enc ! mpegtsmux ! udpsink host=localhost port=5000 I've tried cv::VideoWriter writer = cv::VideoWriter("appsrc

系统：ubuntu16.04 唯一需要的其他“开发环境”是gcc编译器和文本编辑器。为了编译需要GStreamer并使用GStreamer核心库的代码，请记住将此字符串添加到您的gcc命令： pkg-config --cflags --libs gstreamer-1.0 如果您正在使用其他GStreamer库，例如视频库，你必须在上面的字符串gstreamer-1.0之后添加额外的包（例如视频库的gstreamer-video-1.0）。 如果你的应用程序是在libtool的帮助下构建的，例如当使用automake / autoconf作为构建系统时，您必须从gst-sdk-shell环境中运行configure脚本。 获取官方教程的源代码： git clone https://gitlab.freedesktop.org/gstreamer/gst-docs 在每个教程的源代码的底部，您将找到该特定教程的命令，包括所需的库，按要求的顺序。在开发自己的应用程序时，GStreamer文档将告诉您函数所属的库。 构建：gcc basic-tutorial-1.c -o basic-tutorial-1 `pkg-config --cflags --libs gstreamer-1.0` 运行： ./basic-tutorial-1 来源： https://www.cnblogs

I'm trying to do the following: receive video stream using gstreamer and process it with opencv. I've found few solutions, and one of them is to write video into (from gstreamer) fifo and then read it using opencv. (OPTION3 here MJPEG streaming and decoding ). The problem is I cant open pipe. cvCreateFileCapture just never returns. Here is a part code I wrote: if(mkfifo("fifo.avi", S_IRUSR| S_IWUSR) == -1) { cout<<"Cant create fifo"<<endl; cout<<errno<<endl; } loop = g_main_loop_new(NULL, false); fsink = gst_element_factory_make("filesink", "fsink"); g_object_set(G_OBJECT(fsink), "location",

I am newbie with gstreamer and I am trying to be used with it. My first target is to create a simple rtp stream of h264 video between two devices. I am using these two pipelines: Sender: gst-launch-1.0 -v filesrc location=c:\\tmp\\sample_h264.mov ! x264enc ! rtph264pay ! udpsink host=127.0.0.1 port=5000 Receiver: gst-launch-1.0 -v udpsrc port=5000 ! rtpmp2tdepay ! decodebin ! autovideosink But with the first one (the sender) I got the following error: Setting pipeline to PAUSED ... Pipeline is PE*R*O L(LgIsNtG- l.a.u.n h-1.0:5788): CRITICAL **: gst_adapter_map: assertion `size > 0' failed

I'm working on a GStreamer-based program using Python and the GObject introspection bindings. I'm trying to build this pipeline: videomixer name=mix ! autovideosink \ uridecodebin uri=v4l2:///dev/video0 ! mix. The pipeline works perfectly using gst-launch-1.0, but my Python program gives the errors: (minimal.py:12168): GStreamer-CRITICAL **: gst_element_link_pads_full: assertion 'GST_IS_ELEMENT (src)' failed on_error(): (GError('Internal data flow error.',), 'gstbasesrc.c(2865): gst_base_src_loop (): /GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstV4l2Src:source:\nstreaming task paused

1、apt-get安装 参照 https://gstreamer.freedesktop.org/documentation/installing/on-linux.html?gi-language=c 上安装指令，安装失败，提示如下 使用ubuntu16.04的原生源和清华源都试过，不行，换第二种方法 2、源码安装 a）下载： 下载地址： https://gstreamer.freedesktop.org/src/ b）解压 xz -d gstreamer-1.16.0.tar.xz tar -xvf gstreamer-1.16.0.tar 再依次解压 gst-plugins-base-1.16.0.tar.xz gst-plugins-bad-1.16.0.tar.xz gst-plugins-good-1.16.0.tar.xz gst-plugins-ugly-1.16.0.tar.xz gst-libav-1.16.0.tar.xz c）编译 sudo apt-get install build-essential dpkg-dev flex bison autotools-dev automake liborc-dev autopoint libtool gtk-doc-tools libgstreamer1.0-dev cd gstreamer-1.16.0 .

I'm new to Gstreamer, and I have problems when I compile the tutorial 1 of Gstreamer. I'm using Windows 7 64 bit with visual c++ express 2010, and Gstreamer SDK 2012.11 32 bits ( downloaded from here ). Here is the code : #include "stdafx.h" #include <gst/gst.h> int main(int argc, char *argv[]) { GstElement *pipeline; GstBus *bus; GstMessage *msg; /* Initialize GStreamer */ gst_init (&argc, &argv); /* Build the pipeline */ pipeline = gst_parse_launch ("playbin2 uri=file://E:/test_1.MOV", NULL); /* Start playing */ gst_element_set_state (pipeline, GST_STATE_PLAYING); /* Wait until error or EOS