3个不同数据格式的queue的连接到一个capsfilter插件进行多路自定义数据合并, 怎么做, 给出c代码
时间: 2023-05-11 22:03:19 浏览: 94
以下是一个简单的C代码示例,演示如何将三个不同数据格式的队列连接到一个capsfilter插件进行多路自定义数据合并:
```
#include <gst/gst.h>
int main(int argc, char *argv[]) {
GstElement *pipeline, *queue1, *queue2, *queue3, *capsfilter;
GstCaps *caps;
GstBus *bus;
GstMessage *msg;
GstStateChangeReturn ret;
/* Initialize GStreamer */
gst_init(&argc, &argv);
/* Create the elements */
pipeline = gst_pipeline_new("pipeline");
queue1 = gst_element_factory_make("queue", "queue1");
queue2 = gst_element_factory_make("queue", "queue2");
queue3 = gst_element_factory_make("queue", "queue3");
capsfilter = gst_element_factory_make("capsfilter", "capsfilter");
/* Create the caps */
caps = gst_caps_new_simple("video/x-raw",
"format", G_TYPE_STRING, "RGB",
"width", G_TYPE_INT, 640,
"height", G_TYPE_INT, 480,
NULL);
/* Set the caps on the capsfilter */
g_object_set(G_OBJECT(capsfilter), "caps", caps, NULL);
/* Add the elements to the pipeline */
gst_bin_add_many(GST_BIN(pipeline), queue1, queue2, queue3, capsfilter, NULL);
/* Link the elements together */
gst_element_link_many(queue1, capsfilter, NULL);
gst_element_link_many(queue2, capsfilter, NULL);
gst_element_link_many(queue3, capsfilter, NULL);
/* Set the pipeline to the playing state */
ret = gst_element_set_state(pipeline, GST_STATE_PLAYING);
if (ret == GST_STATE_CHANGE_FAILURE) {
g_printerr("Unable to set the pipeline to the playing state.\n");
gst_object_unref(pipeline);
return -1;
}
/* Wait until error or EOS */
bus = gst_element_get_bus(pipeline);
msg = gst_bus_timed_pop_filtered(bus, GST_CLOCK_TIME_NONE, GST_MESSAGE_ERROR | GST_MESSAGE_EOS);
/* Free resources */
if (msg != NULL)
gst_message_unref(msg);
gst_object_unref(bus);
gst_element_set_state(pipeline, GST_STATE_NULL);
gst_object_unref(pipeline);
gst_caps_unref(caps);
return 0;
}
```
这个示例中,我们创建了一个名为“pipeline”的GStreamer管道,并向其中添加了三个队列元素和一个capsfilter元素。我们还创建了一个名为“video/x-raw”的简单caps,并将其设置为capsfilter的属性。最后,我们将三个队列元素分别链接到capsfilter元素,以便将它们的数据合并到一个输出流中。