[gst-devel] element seek and filesink

[Sebastien Laporte]

Hi all,

 

I would like to have some insights on an application I’m trying to write. I
have an app that decodes an MMP file and encodes it to an MP3 file. I have
the pipeline setup and everything works ok.

 

Now, I’m trying to create only a snippet of that song, 30 seconds offset
from the beginning of the MMP file for a 30 seconds length.

 

To begin with, I initialize the pipeline and start it. Then I try to seek to
30 seconds into the song. It fails every time. It work’s correctly for an
alsasink but not for filesink.

Do I need to do something special to make it work with filesink?  I’m using
0.8.10.

 

 

#include <stdio.h>

#include <gst/gst.h>

#include <string.h>

 

GstElement *pipeline, 

           *source, 

           *decrypter,

           *sink;

 

int

main(int argc, char *argv[])

{

 

    gchar filename[32];

    gchar *ptr;

 

    gst_init(&argc, &argv);

    if(argc != 2) {

        g_print("Usage: %s <MMP filename>\n", argv[0]);

        return -1;

    }

    

    strcpy(filename, argv[1]);

    ptr = strstr(filename, ".");

    sprintf(ptr, ".MP3");

 

    pipeline = gst_pipeline_new("converter");

    source = gst_element_factory_make("filesrc", "file-source");

    g_object_set(G_OBJECT(source), "location", argv[1], NULL);

 

    decrypter = gst_element_factory_make("mmp", "mmp");

    g_object_set(G_OBJECT(decrypter),




                  NULL);

 

    sink = gst_element_factory_make("filesink", "file-sink");

    g_object_set(G_OBJECT(sink), "location", filename, NULL);

 

    gst_bin_add_many(GST_BIN(pipeline), source, decrypter, sink, NULL);

    gst_element_link_many(source, decrypter, sink, NULL);

    gst_element_set_state(pipeline, GST_STATE_PLAYING);

    

    if(!gst_element_seek(pipeline, GST_FORMAT_TIME | GST_SEEK_METHOD_SET |
GST_SEEK_FLAG_FLUSH,30*GST_SECOND)){

            g_print("seek failed");

    }

    

   while(gst_bin_iterate(GST_BIN(pipeline)));

 

    gst_element_set_state(pipeline, GST_STATE_NULL);

    gst_object_unref(GST_OBJECT (pipeline));

 

    return 0;

}

 

 

 

Tx

 

Sébastien Laporte 

 

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