gstreamer

Goal 本教程介绍剩下的的使用GStreamer的所需的基本概念，它允许随时地建立管道，作为信息变得可用，而不必在你的应用程序的开头定义一个全局的管道。 本教程后，您将具备必要的知识，开始 Playback tutorials 。这个教程将讨论的是： 如何在链接元素时进行更好的控制。 有兴趣的事件如何得到通知，以便您能及时作出反应。 一个元素可以有的不同的状态 Introduction 正如你将要看到的，本教程中的管道没有完全建成之前，它被设置为播放状态。这是确定。如果我们不采取进一步行动，数据将达到管道的末端，只是被丢弃。但是，我们要采取进一步行动... 在这个例子中，我们打开一个复合（或复用）的文件，这就是，音频和视频是 一起 存放在 一个容器文件里面。负责开这样的容器被称为分路器（ demuxers ）的元素， 一些这样 容器格式的例子是的Matroska（MKV）， Quick Time （QT，MOV），OGG，或 Advanced Systems Format （ASF，WMV，WMA）。 如果容器嵌入多个数据流（一个视频和两个音频轨道，例如），分路器将它们分开，并通过不同的输出端口揭露他们。以这种方式，不同的分支可以在管道中被创建，处理不同类型的数据。 通过它的GStreamer元件彼此连通的端口称为 衬垫 （ GstPad ）。存在接收端 衬垫（ sink

Following code is written to play a .wav file but it doesn't seem to work. I would like to know if i am missing something in it. Code: #include <gst/gst.h> #include <glib.h> int main(int argc , char *argv[]) { GMainLoop *loop; GstElement *source,*audioparser,*sink,*pipeline; GstBus *bus; gst_init(&argc,&argv); // create a pipeline loop = g_main_loop_new (NULL, FALSE); pipeline = gst_pipeline_new ("wav-player"); source = gst_element_factory_make("filesrc","file-source"); audioparser = gst_element_factory_make("wavparse","wav-parser"); sink = gst_element_factory_make("alsasink","sink1"); g

I would like to stream camera data over UDP multicast using gstreamer. For that i used below pipeline, gst-launch-1.0 v4l2src ! videoconvert ! video/x-raw,width=720,height=576,framerate=25/1 ! x264enc ! mpegtsmux ! rtpmp2tpay ! udpsink host=224.1.1.1 port=9090 auto-multicast=true sync=true async=false qos=true But, I am getting below error, could not get/set settings from/on resource : gstmultiudpsink.c(948): gst_multiudpsink_configure_client (): Could not join Multicast group : No such Device But, the same pipeline is working in Ubuntu14.10 64 bit PC. It didn't work on RHEL7 64 bit PC. These

I am trying to stream audio and video via Gstreamer via UDP but playback on VLC only returns video without audio. Currently I am using a sample of Big Buck Bunny and have confirmed that it does have audio. I am planning to use Snowmix to feed media to Gstreamer output in the future. Streaming from file source via UDP to playback on VLC I currently perform by: gst-launch-1.0 -v uridecodebin uri=file:///home/me/files/Snowmix-0.5.1/test/big_buck_bunny_720p_H264_AAC_25fps_3400K.MP4 ! queue ! videoconvert ! x264enc ! mpegtsmux ! queue ! udpsink host=230.0.0.1 port=4012 sync=true which allows me to

Manual Hello World 将下面代码copy到一个命名为 basic-tutorial-1.c的文件中。 #include <gst/gst.h> int main(int argc, char *argv[]) { GstElement *pipeline, *source, *sink; GstBus *bus; GstMessage *msg; GstStateChangeReturn ret; /* Initialize GStreamer */ gst_init (&argc, &argv); /* Create the elements */ source = gst_element_factory_make ("videotestsrc", "source"); sink = gst_element_factory_make ("autovideosink", "sink"); /* Create the empty pipeline */ pipeline = gst_pipeline_new ("test-pipeline"); if (!pipeline || !source || !sink) { g_printerr ("Not all elements could be created.\n"); return -1; } /* Build

这个教程是建立在已经安装并配置好gstreamer sdk的基础上的，如果没有安装好 gstreamer sdk，请参看： http://docs.gstreamer.com/display/GstSDK/Installing+the+SDK 代码及操作示例 将下面代码copy到一个命名为 basic-tutorial-1.c的文件中。 #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=http://docs.gstreamer.com/media/sintel_trailer-480p.webm", NULL); /* Start playing */ gst_element_set_state (pipeline, GST_STATE_PLAYING); /* Wait until error or EOS */ bus = gst_element_get_bus

I've written a Gstreamer source plugin, it can produce buffers and transform to downstream elements and do preview. Recently I received a request to implement multi-stream, that one stream to do preview, and the other stream to do recording(using filesink, I suppose). I investigated 'tee' plugin before, but it turns out that it only supports multiple streams with the same formats/resolutions. What plugin should I use if two streams have different formats/resolutions , say, two capsfilters in one pipeline? If there are plugin could do that, could you provide some examples for how to use them?

I have setup my raspberry pi with the camera board. The code in rpi is: raspivid -t 999999 -h 720 -w 1080 -fps 25 -b 2000000 -o - | gst-launch-0.10 -v fdsrc fd=0 ! h264parse ! rtph264pay ! udpsink host=192.168.2.1 port=5000 and then I run in my mac: gst-launch-1.0 -v udpsrc port=5000 ! application/x-rtp,payload=96,media=video,clock-rate=90000,encoding-name=H264,sprop-parameter-sets=\"J2QAH6wrQCIC3y8A8SJq\\,KO4CXLA\\=\" ! rtph264depay ! avdec_h264 ! videoconvert ! autovideosink sync=false The video is showing just fine. Now I have the tutorial 3 of Android Gstreamer and my pipeline is (udpsink