我有一個「 C「實現你正在尋找的代碼。我覺得應該是相當簡單的轉換爲 「巨蟒」
//Display RTSP streaming of video
//(c) 2011 enthusiasticgeek
// This code is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#include <string.h>
#include <math.h>
#include <gst/gst.h>
#include <glib.h>
static gboolean bus_call (GstBus *bus,GstMessage *msg, gpointer data){
GMainLoop *loop = (GMainLoop *) data;
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_EOS:
g_print ("Stream Ends\n");
g_main_loop_quit (loop);
break;
case GST_MESSAGE_ERROR: {
gchar *debug;
GError *error;
gst_message_parse_error (msg, &error, &debug);
g_free (debug);
g_printerr ("Error: %s\n", error->message);
g_error_free (error);
g_main_loop_quit (loop);
break;
}
default:
break;
}
return TRUE;
}
static void on_pad_added (GstElement *element, GstPad *pad, gpointer data){
GstPad *sinkpad;
GstElement *decoder = (GstElement *) data;
/* We can now link this pad with the rtsp-decoder sink pad */
g_print ("Dynamic pad created, linking source/demuxer\n");
sinkpad = gst_element_get_static_pad (decoder, "sink");
gst_pad_link (pad, sinkpad);
gst_object_unref (sinkpad);
}
int main (int argc, char *argv[])
{
GMainLoop *loop;
GstBus *bus;
GstElement *source;
GstElement *decoder;
GstElement *sink;
GstElement *pipeline;
GstElement *demux;
GstElement *colorspace;
/* Initializing GStreamer */
gst_init (&argc, &argv);
loop = g_main_loop_new (NULL, FALSE);
//gst-launch-0.10 rtspsrc location=rtsp://<ip> ! decodebin ! ffmpegcolorspace ! autovideosink
//gst-launch -v rtspsrc location="rtsp://<ip> ! rtpmp4vdepay ! mpeg4videoparse ! ffdec_mpeg4 ! ffmpegcolorspace! autovideosink
//gst-launch -v rtspsrc location="rtsp://<ip> ! rtpmp4vdepay ! ffdec_mpeg4 ! ffmpegcolorspace! autovideosink
/* Create Pipe's Elements */
pipeline = gst_pipeline_new ("video player");
g_assert (pipeline);
source = gst_element_factory_make ("rtspsrc", "Source");
g_assert (source);
demux = gst_element_factory_make ("rtpmp4vdepay", "Depay");
g_assert (demux);
decoder = gst_element_factory_make ("ffdec_mpeg4", "Decoder");
g_assert (decoder);
colorspace = gst_element_factory_make ("ffmpegcolorspace", "Colorspace");
g_assert(colorspace);
sink = gst_element_factory_make ("autovideosink", "Output");
g_assert (sink);
/*Make sure: Every elements was created ok*/
if (!pipeline || !source || !demux || !decoder || !colorspace || !sink) {
g_printerr ("One of the elements wasn't create... Exiting\n");
return -1;
}
g_printf(" \nPipeline is Part(A) ->(dynamic/runtime link) Part(B)[ Part(B-1) -> Part(B-2) -> Part(B-3) ]\n\n");
g_printf(" [source](dynamic)->(dynamic)[demux]->[decoder]->[colorspace]->[videosink] \n\n");
/* Set video Source */
g_object_set (G_OBJECT (source), "location", argv[1], NULL);
//g_object_set (G_OBJECT (source), "do-rtcp", TRUE, NULL);
g_object_set (G_OBJECT (source), "latency", 0, NULL);
/* Putting a Message handler */
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, bus_call, loop);
gst_object_unref (bus);
/* Add Elements to the Bin */
gst_bin_add_many (GST_BIN (pipeline), source, demux, decoder, colorspace, sink, NULL);
/* Link confirmation */
if (!gst_element_link_many (demux, decoder, colorspace, sink, NULL)){
g_warning ("Linking part (B) Fail...");
}
g_printf("\nNote that the source will be linked to the demuxer(depayload) dynamically.\n\
The reason is that rtspsrc may contain various elements (for example\n\
audio and video). The source pad(s) will be created at run time,\n\
by the rtspsrc when it detects the amount and nature of elements.\n\
Therefore we connect a callback function which will be executed\n\
when the \"pad-added\" is emitted.\n");
/* Dynamic Pad Creation */
if(! g_signal_connect (source, "pad-added", G_CALLBACK (on_pad_added),demux))
{
g_warning ("Linking part (A) with part (B) Fail...");
}
/* Run the pipeline */
g_print ("Playing: %s\n", argv[1]);
gst_element_set_state (pipeline, GST_STATE_PLAYING);
g_main_loop_run (loop);
/* Ending Playback */
g_print ("End of the Streaming... ending the playback\n");
gst_element_set_state (pipeline, GST_STATE_NULL);
/* Eliminating Pipeline */
g_print ("Eliminating Pipeline\n");
gst_object_unref (GST_OBJECT (pipeline));
return 0;
}
的Makefile
test = test12
ext = c
CC = gcc
CPP = g++
gstreamer:
$(CC) -g $(test).$(ext) -o $(test) `pkg-config gstreamer-0.10 --libs --cflags` `pkg-config gtk+-2.0 --libs --cflags`
clean:
rm -rf $(test)
UPDATE
相應的Java代碼
// Display RTSP streaming of video
// (c) 2011 enthusiasticgeek
// This code is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
// Leave Credits intact
package video2; //replace this with your package
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
//import org.gstreamer.Caps;
import org.gstreamer.Element;
import org.gstreamer.ElementFactory;
import org.gstreamer.Gst;
import org.gstreamer.Pad;
import org.gstreamer.PadDirection;
import org.gstreamer.Pipeline;
import org.gstreamer.swing.VideoComponent;
/**
* A Simple videotest example.
*/
public class Main {
public Main() {
}
private static Pipeline pipe;
public static void main(String[] args) {
// Quartz is abysmally slow at scaling video for some reason, so turn it off.
System.setProperty("apple.awt.graphics.UseQuartz", "false");
args = Gst.init("SwingVideoTest", args);
pipe = new Pipeline("pipeline");
/*
final Element videosrc = ElementFactory.make("videotestsrc", "source");
final Element videofilter = ElementFactory.make("capsfilter", "flt");
videofilter.setCaps(Caps.fromString("video/x-raw-yuv, width=720, height=576"
+ ", bpp=32, depth=32, framerate=25/1"));
*/
pipe.getBus().connect(new Bus.ERROR() {
public void errorMessage(GstObject source, int code, String message) {
System.out.println("Error occurred: " + message);
Gst.quit();
}
});
pipe.getBus().connect(new Bus.STATE_CHANGED() {
public void stateChanged(GstObject source, State old, State current, State pending) {
if (source == pipe) {
System.out.println("Pipeline state changed from " + old + " to " + current);
}
}
});
pipe.getBus().connect(new Bus.EOS() {
public void endOfStream(GstObject source) {
System.out.println("Finished playing file");
Gst.quit();
}
});
pipe.getBus().connect(new Bus.TAG() {
public void tagsFound(GstObject source, TagList tagList) {
for (String tag : tagList.getTagNames()) {
System.out.println("Found tag " + tag + " = "
+ tagList.getValue(tag, 0));
}
}
});
final Element source = ElementFactory.make("rtspsrc", "Source");
final Element demux = ElementFactory.make("rtpmp4vdepay", "Depay");
final Element decoder=ElementFactory.make("ffdec_mpeg4", "Decoder");
final Element colorspace = ElementFactory.make("ffmpegcolorspace", "Colorspace");
//final Element sink = ElementFactory.make ("autovideosink", "Output");
SwingUtilities.invokeLater(new Runnable() {
public void run() {
// Create the video component and link it in
VideoComponent videoComponent = new VideoComponent();
Element videosink = videoComponent.getElement();
source.connect(new Element.PAD_ADDED() {
public void padAdded(Element element, Pad pad) {
pad.link(demux.getStaticPad("sink"));
}
});
Pad p = new Pad(null, PadDirection.SRC);
source.addPad(p);
source.set("location","rtsp://<user>:<pass>@<ip>/mpeg4/1/media.amp"); //replace this with your source
pipe.addMany(source, demux, decoder, colorspace, videosink);
Element.linkMany(demux, decoder, colorspace, videosink);
// Now create a JFrame to display the video output
JFrame frame = new JFrame("Swing Video Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(videoComponent, BorderLayout.CENTER);
videoComponent.setPreferredSize(new Dimension(720, 576));
frame.pack();
frame.setVisible(true);
// Start the pipeline processing
pipe.play();
}
});
}
}
嘗試'gst_parse_launch' API呼叫。它允許您在即將變得更短的代碼中使用gst-launch語法。通過命名元素，您可以根據需要設置參數，而無需進行字符串插值。 – joeforker 2010-11-16 14:43:27
嗨，謝謝你的回答。我已經嘗試gst_parse_launch，但我的問題是我的GstPipeline對象不再有像位置一樣的屬性。我假設「命名元素」（如你所說）可以解決我的問題，但我不知道如何做到這一點:( – tirlototo 2010-11-16 15:05:53