Question

在成功执行多个教程后，尝试编译并运行示例appsrc代码。这是一个文档代码，假设它运行但是......

用于编译的命令

gcc appGuideAppSrc.c -o appGuide `pkg-config --cflags --libs gstreamer-0.10 gstreamer-app-0.10`

后出现以下错误

appGuideAppSrc.c: In function ‘cb_need_data’:  
appGuideAppSrc.c:14:8: warning: assignment makes pointer from integer without a cast [enabled by default]  
appGuideAppSrc.c:18:25: error: lvalue required as left operand of assignment

好的，警告很好，但它抛出错误的行似乎没问题

   GST_BUFFER_PTS (buffer) = timestamp;

根据以下@Michal的回答，将其更改为TIMESTAMP并收到以下错误

(appGuide:11043): GLib-GObject-CRITICAL **: g_object_set: assertion `G_IS_OBJECT (object)' failed

(appGuide:11043): GStreamer-CRITICAL **: gst_bin_add_many: assertion `GST_IS_ELEMENT (element_1)' failed  

(appGuide:11043): GStreamer-CRITICAL **: gst_element_link_many: assertion `GST_IS_ELEMENT (element_1)' failed  

(appGuide:11043): GLib-GObject-CRITICAL **: g_object_set: assertion `G_IS_OBJECT (object)' failed  

(appGuide:11043): GLib-GObject-WARNING **: invalid (NULL) pointer instance  

(appGuide:11043): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion  `G_TYPE_CHECK_INSTANCE (instance)' failed

任何输入？

参考文献：
whole appsrc sample code

Answer 1

看来您正在尝试使用旧版本的gstreamer编译gstreamer-1.0示例：0.10。

在gstreamer-0.11中引入了{p> GST_BUFFER_PTS和GST_BUFFER_DTS，并将GST_BUFFER_TIMESTAMP替换为gstreamer-0.10。

使用较新的gstreamer版本或将GST_BUFFER_PTS更改为GST_BUFFER_TIMESTAMP。

gstreamer示例文档代码未运行

1 个答案: