am5728两路视频编解码问题

jinqiang wang

Prodigy 120 points

Other Parts Discussed in Thread: AM5728

手册上说am5728的IVAHD支持H264编解码，我想用它做两路视频编解码，需要如何配置呢？

9 年多前

0 abayyy 9 年多前

Intellectual 413 points

你好，请问一下 5728的 IVA HD 模块应该怎么使用呢？我没有找到demo，也不知道它的 API在什么地方，能告知一下吗？方便的话加个 qq 吧 164422340 谢谢

0 Yaoming Qin 9 年多前回复 abayyy

TI__Mastermind 35157 points

您可以先熟悉下gstreamer。

0 abayyy 9 年多前回复 Yaoming Qin

Intellectual 413 points

你好，我熟悉了一下 gstreamer 下面是我的代码我是用这个代码而且也是使用的交叉编译编译工具链编译的:

#include <stdio.h>
#include <string.h>
#include <gst/gst.h>
#include <glib.h>

GstElement *pipeline,*source,*demuxer,
      *Videoqueue,*h264par,*Videodecoder,*Videosink,
      *Audioqueue,*Audiodecoder,*Audiosink;

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("play ending!\n"); 
    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){

  char video[12]="video_0"; //char audio[9]="audio_00";
  
  gchar *new_pad_name = GST_PAD_NAME(pad);
  
  g_print("recvfrom '%s' new pad' %s' \n",GST_ELEMENT_NAME (element),
          new_pad_name);
  
  GstPad *audio_sink_pad ,*video_sink_pad;
  video_sink_pad = gst_element_get_static_pad(Videoqueue,"sink");
  audio_sink_pad = gst_element_get_static_pad(Audioqueue,"sink");
  
  if(!strcmp(new_pad_name,video)){
      g_print("link %s pad\n",new_pad_name);
      gst_pad_link(pad,video_sink_pad);
  }else{
      g_print("link %s pad\n",new_pad_name);
      gst_pad_link(pad,audio_sink_pad);
  }
  
  gst_object_unref(video_sink_pad);
  gst_object_unref(audio_sink_pad);
}


int main(int argc,char *argv[]){
  
  GMainLoop *loop;
  GstBus *bus;
  gst_init(&argc,&argv);
  loop = g_main_loop_new(NULL,FALSE);
  
  if (argc != 2)
  {
      g_printerr("You need file : %s <.moc filename>\n",argv[0]);
      return(-1);
  }
  
  //创建用来容纳元件的新管道
  pipeline = gst_pipeline_new("test-pipeline");
  if (!pipeline){
          g_printerr("pipeline creat failure,quit!\n");
          return(-1);
  }

  //生成用于读取硬盘数据的元件
  source   = gst_element_factory_make("filesrc","file-source");
  if (!source){
          g_printerr("source creat failure,quit!\n");
          return(-1);
  }

  //流分离器
  demuxer  = gst_element_factory_make("qtdemux","demuxer");
  if (!demuxer){
          g_printerr("demuxer creat failure,quit!\n");
          return(-1);
  }

  //队列元件 同步输出设备，播放视频、音频流，双线程可以独立运行并达到更好的同步效果。
  Videoqueue = gst_element_factory_make("queue","videoqueue");
  if (!Videoqueue){
          g_printerr("Videoqueue creat failure,quit!\n");
          return(-1);
  }

  //h264parse
  h264par = gst_element_factory_make("h264parse","h264par");

  if (!h264par){
          g_printerr("h264par creat failure,quit!\n");
          return(-1);
  }
  
  //视频解码器
  Videodecoder  = gst_element_factory_make("ducatih264dec","video-decoder");
  if (!Videodecoder){
          g_printerr("Videodecoder creat failure,quit!\n");
          return(-1);
  }

  //视频回放元件
  Videosink = gst_element_factory_make("kmssink","video-output");
  if (!Videosink){
          g_printerr("Videosink creat failure,quit!\n");
          return(-1);
  }

  //队列元件
  Audioqueue = gst_element_factory_make("queue","audioqueue");
  if (!Audioqueue){
          g_printerr("Audioqueue creat failure,quit!\n");
          return(-1);
  }



    //音频解码器
  Audiodecoder = gst_element_factory_make("decodebin","audio-decoder");
  if (!Audiodecoder){
          g_printerr("Audiodecoder creat failure,quit!\n");
          return(-1);
  }
  //音频回放元件
  Audiosink = gst_element_factory_make("fakesink","audio-output");
  if (!Audiosink){
          g_printerr("Audiosink creat failure,quit!\n");
          return(-1);
  }
 
//|| !h264par 
/*
  if (!pipeline || !source || !demuxer || !queue || !decoder
      || !textoverlay  || !sink || !Audioqueue || !Audiodecoder
      || !Audiosink){
          g_printerr("element creat failure,quit!\n");
          return(-1);
  }
  */
  //设置 source的location 参数 文件地址
  g_object_set(G_OBJECT(source),"location",argv[1],NULL);
  //g_object_set(G_OBJECT(Videosink),"scale",1,NULL);


  //得到 管道的消息总线
  bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));
  gst_bus_add_watch(bus,bus_call,loop); //添加消息监视器
  gst_object_unref(bus);
  
  //添加元件
  gst_bin_add_many(GST_BIN(pipeline),
            source,demuxer,Videoqueue,h264par,Videodecoder,Videosink,
            Audioqueue,Audiodecoder,Audiosink,NULL);
          
  //分别链接元件
  gst_element_link(source,demuxer);
  gst_element_link_many(Videoqueue,h264par,Videodecoder,Videosink,NULL);
  gst_element_link_many(Audioqueue,Audiodecoder,Audiosink,NULL);
  
  //按照不同的流，动态链接不同的接收衬垫 sink pad
  g_signal_connect(demuxer,"pad-added",G_CALLBACK(on_pad_added),NULL);
  


  //开始播放
  g_print("start playing %s\n",argv[1]);
  gst_element_set_state(pipeline,GST_STATE_PLAYING);
  g_main_loop_run(loop);
  
  //停止管道处理流程
  gst_element_set_state(pipeline,GST_STATE_NULL);
  //释放占用的资源
  gst_object_unref(GST_OBJECT(pipeline));
  return(0);
}

编译命令：/home/aba/ti-processor-sdk-linux-am57xx-evm-03.00.00.04/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-linux-gnueabihf-gcc -pthread gst_mov.c -o gst_mov -I/home/aba/ti-processor-sdk-linux-am57xx-evm-03.00.00.04/targetNFS/usr/include/gstreamer-1.0/ -I/home/aba/ti-processor-sdk-linux-am57xx-evm-03.00.00.04/targetNFS/usr/include/glib-2.0/ -I/home/aba/ti-processor-sdk-linux-am57xx-evm-03.00.00.04/targetNFS/usr/lib/glib-2.0/include/ -I/home/aba/ti-processor-sdk-linux-am57xx-evm-03.00.00.04/targetNFS/usr/include/glib-2.0/glib/ -L/home/aba/ti-processor-sdk-linux-am57xx-evm-03.00.00.04/targetNFS/usr/lib -L/home/aba/ti-processor-sdk-linux-am57xx-evm-03.00.00.04/targetNFS/lib -lgstreamer-1.0 -lgobject-2.0 -lgmodule-2.0 -lpthread -lxml2 -lglib-2.0

//板子接上键盘 ctrl+Backspace ctrl+F2 模式

runing: ./gst_mov /usr/share/ti/video/TearOfSteel-Short-1920x800.mov

//上面这的程序运行没有错误可是并没有出现视频画面谢谢

//下面这个命令是可以执行的

gst-launch-1.0 filesrc location=b.mov ! qtdemux name=demux demux.audio_0 ! queue ! decodebin ! fakesink demux.video_0 ! queue ! h264parse ! ducatih264dec ! kmssink scale=true