安裝gstreamer開發環境

ubuntu中安裝gstreamer開發環境:

* 安裝gstreamer基本庫，工具，以及插件

sudo apt-get install libgstreamer0.10-dev gstreamer-tools gstreamer0.10-tools gstreamer0.10-doc
sudo apt-get install gstreamer0.10-plugins-base gstreamer0.10-plugins-good gstreamer0.10-plugins-ugly gstreamer0.10-plugins-bad gstreamer0.10-plugins-bad-multiverse

* 安裝ffmpeg支持

sudo apt-get install gstreamer0.10-ffmpeg

* 測試

gst-launch autovideosrc ! ffmpegcolorspace ! autovideosink

或

gst-launch v4l2src ! ffmpegcolorspace ! autovideosink

* 錄制攝像頭視頻

 

以上內容轉自 http://foyo99.zhuidaniu.com/blogs/724

 

1,設置環境變量

export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH
export LD_LIBRARY_PATH=/usr/local/lib

2,安裝mad插件

下載libmad-0.15.1b.tar.gz
http://sourceforge.net/project/showfiles.php?group_id=12349

./configure --prefix=/usr/local/

make

make install

下載libid3tag-0.15.1b.tar.gz
http://sourceforge.net/project/showfiles.php?group_id=12349

./configure --prefix=/usr/local/

make

make install

下載gst-plugins-ugly-0.10.9.tar.bz2   2008.8.26
http://gstreamer.freedesktop.org/src/

./configure

make

make install

這樣，在/usr/local/lib/gstreamer-0.10目錄下就出現了

libgstmad.a libgstmad.la libgstmad.so

mad插件也就安裝成功了!

檢測mad插件是否安裝上的命令

gst-inspect mad

會顯示已安裝的mad插件的詳細信息

3,用gst-launch測試播放mp3

gst-launch filesrc location="beyond.mp3" ! mad ! audioconvert ! alsasink

可以聽到音樂了。

4,用mp3_dec.c文件測試

----------------
#include <gst/gst.h>

int
main(int argc,char *argv[])
{
GstElement *pipeline,*filesrc,*decoder,*convert,*audiosink;

gst_init(&argc,&argv);

if(argc != 2){
   g_print("usage: %s <mp3 filename>\n",argv[0]);
   exit(-1);
}

pipeline=gst_pipeline_new("pipeline");

if(!pipeline)
{
   g_print("Maybe pipeline cann't be created!\n");
   exit(-1);
}

filesrc=gst_element_factory_make("filesrc","disk_source");

if(!filesrc)
{
   g_print("Maybe filesrc cann't be created!\n");
   exit(-1);
}
g_object_set(G_OBJECT(filesrc),"location",argv[1],NULL);

decoder=gst_element_factory_make("mad","decoder-audio");
if(!decoder)
{
   g_print("Maybe decoder cann't be created!\n");
   exit(-1);
}

convert = gst_element_factory_make("audioconvert", "a-convert");
if(! convert)
{
   g_print("Maybe convert cann't be created!\n");
   exit(-1);
}

audiosink=gst_element_factory_make("osssink","play_audio");
if(! audiosink)
{
   g_print("Maybe audiosink cann't be created!\n");
   exit(-1);
}

gst_bin_add_many(GST_BIN(pipeline),filesrc,decoder,convert,audiosink,NULL);

gst_element_link_many(filesrc,decoder,convert,audiosink,NULL);

gst_element_set_state(pipeline,GST_STATE_PLAYING);

while(gst_bin_iterate_recurse(GST_BIN(pipeline)));

gst_element_set_state(pipeline,GST_STATE_NULL);

gst_object_unref(GST_OBJECT(pipeline));

exit(0);
}
----------------

編譯命令

gcc -Wall $(pkg-config --cflags --libs gstreamer-0.10)mp3_dec.c -o mp3_dec

生成可執行文件

mp3_dec

播放mp3

./mp3_dec beyond.mp3

就可以聽到音樂了!

 

note:

如果遇到

Element = gst_element_factory_make("mad", "decoder");
Element為null，說明沒安裝mad插件，可以通過

gst-inspect mad

命令查看mad插件是否正常安裝，如沒有安裝，在ubuntu下可以通過如下命令進行安裝：

sudo apt-get install gstreamer0.10-plugins-ugly