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hello everybody:
I met some problems when I used IVA-HD's AM5728 module:
Here are my steps:
1. AM5728 connected to the keyboard, CTRL+BACKSPACE, CTRL+F2
2. gst-launch-1.0 filesrc location=/usr/share/ti/video/TearOfSteel-Short-1920x800.mov ! qtdemux name=demux demux.audio_0 ! queue ! decodebin ! fakesink demux.video_0 ! queue ! h264parse ! ducatih264dec ! kmssink scale=true
This command can be executed smoothly, you can see the board screen in the play video,
However,when I convert this command to the C language, the program can run, but the screen does not have a picture, the following is my code:
#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);
}
//creating pipeline
pipeline = gst_pipeline_new("test-pipeline");
if (!pipeline){
g_printerr("pipeline creat failure,quit!\n");
return(-1);
}
//creat filesrc element
source = gst_element_factory_make("filesrc","file-source");
if (!source){
g_printerr("source creat failure,quit!\n");
return(-1);
}
//qtmuxer
demuxer = gst_element_factory_make("qtdemux","demuxer");
if (!demuxer){
g_printerr("demuxer creat failure,quit!\n");
return(-1);
}
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);
}
//video decode
Videodecoder = gst_element_factory_make("ducatih264dec","video-decoder");
if (!Videodecoder){
g_printerr("Videodecoder creat failure,quit!\n");
return(-1);
}
//video sink
Videosink = gst_element_factory_make("kmssink","video-output");
if (!Videosink){
g_printerr("Videosink creat failure,quit!\n");
return(-1);
}
Audioqueue = gst_element_factory_make("queue","audioqueue");
if (!Audioqueue){
g_printerr("Audioqueue creat failure,quit!\n");
return(-1);
}
Audiodecoder = gst_element_factory_make("decodebin","audio-decoder");
if (!Audiodecoder){
g_printerr("Audiodecoder creat failure,quit!\n");
return(-1);
}
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);
}
*/
//set source location
g_object_set(G_OBJECT(source),"location",argv[1],NULL);
//g_object_set(G_OBJECT(Videosink),"scale",1,NULL);
//bus
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);
//add_bin
gst_bin_add_many(GST_BIN(pipeline),
source,demuxer,Videoqueue,h264par,Videodecoder,Videosink,
Audioqueue,Audiodecoder,Audiosink,NULL);
//link element
gst_element_link(source,demuxer);
gst_element_link_many(Videoqueue,h264par,Videodecoder,Videosink,NULL);
gst_element_link_many(Audioqueue,Audiodecoder,Audiosink,NULL);
// sink pad
g_signal_connect(demuxer,"pad-added",G_CALLBACK(on_pad_added),NULL);
//playing
g_print("start playing %s\n",argv[1]);
gst_element_set_state(pipeline,GST_STATE_PLAYING);
g_main_loop_run(loop);
//stop
gst_element_set_state(pipeline,GST_STATE_NULL);
//free
gst_object_unref(GST_OBJECT(pipeline));
return(0);
}
Compile: /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_mp4.c -o gst_mp4 -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
run: ./gst_mp4 /usr/share/ti/video/TearOfSteel-Short-1920x800.mov
