GSTREAMER，如何使用Android上的C播放UDP流？

发布于 2025-01-18 14:50:38 字数 2185 浏览 2 评论 0 原文

我正在尝试使用Android上的GSTREAMER播放UDP流。（我已经使用了此官方GStreamer的教程）。我可以播放RTSP和HTTPS流，但是当我通过UDP URI（像这样： udp：//@238.0.0.1：1234 ）时，什么都不会发生（有黑屏幕）。在日志中，我有：从element uredecodebin1收到的错误：您的gstreamer安装缺少插件。我找到了一些文档在这里关于安装插件，但我不明白该怎么做。

这是我使用的代码的部分：

data->context = g_main_context_new ();
g_main_context_push_thread_default (data->context);

/* Build pipeline */

data->pipeline = gst_parse_launch ("playbin", &error);

if (error) {
 gchar *message =
    g_strdup_printf ("Unable to build pipeline: %s", error->message);
 g_clear_error (&error);
 set_ui_message (message, data);
 g_free (message);
 return NULL;
}

第二个：

/* Set playbin2's URI */
void gst_native_set_uri (JNIEnv * env, jobject thiz, jstring uri)
{
CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);
if (!data || !data->pipeline)
   return;
const gchar *char_uri = (*env)->GetStringUTFChars (env, uri, NULL);
GST_DEBUG ("Setting URI to %s", char_uri);
if (data->target_state >= GST_STATE_READY)
  gst_element_set_state (data->pipeline, GST_STATE_READY);
g_object_set (data->pipeline, "uri", char_uri, NULL);

(*env)->ReleaseStringUTFChars (env, uri, char_uri);

data->duration = GST_CLOCK_TIME_NONE;
data->is_live |=
      (gst_element_set_state (data->pipeline,
                              data->target_state) == GST_STATE_CHANGE_NO_PREROLL);

}

完整代码是在这里

这是我在C和JNI中所做的第一件事，所以我将感谢工作代码片段。

原文

I'm trying to play udp stream using Gstreamer on android. (I've used this tutorial from the official Gstreamer website). I can play rtsp and https streams, but when I pass udp uri (like this: udp://@238.0.0.1:1234) nothing happens (there is a black screen). In the log I have: Error received from element uridecodebin1: Your GStreamer installation is missing a plug-in. I've found some documentation here about installing plugins, but I don't understand how to do that.

Here is the piece of the code I use:

data->context = g_main_context_new ();
g_main_context_push_thread_default (data->context);

/* Build pipeline */

data->pipeline = gst_parse_launch ("playbin", &error);

if (error) {
 gchar *message =
    g_strdup_printf ("Unable to build pipeline: %s", error->message);
 g_clear_error (&error);
 set_ui_message (message, data);
 g_free (message);
 return NULL;
}

and the 2nd one:

/* Set playbin2's URI */
void gst_native_set_uri (JNIEnv * env, jobject thiz, jstring uri)
{
CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);
if (!data || !data->pipeline)
   return;
const gchar *char_uri = (*env)->GetStringUTFChars (env, uri, NULL);
GST_DEBUG ("Setting URI to %s", char_uri);
if (data->target_state >= GST_STATE_READY)
  gst_element_set_state (data->pipeline, GST_STATE_READY);
g_object_set (data->pipeline, "uri", char_uri, NULL);

(*env)->ReleaseStringUTFChars (env, uri, char_uri);

data->duration = GST_CLOCK_TIME_NONE;
data->is_live |=
      (gst_element_set_state (data->pipeline,
                              data->target_state) == GST_STATE_CHANGE_NO_PREROLL);

}

Full code is here

This is the first thing I'm doing in C and JNI, so I would be grateful for working code snippet.

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