[gst-devel] element seek and filesink

[Stefan Kost]

Hi Sebastien,

its recommended to use gstreamer 0.10 when writing new applications. Still I 
belive in 0.10 seeking do't work with filesink. I also like to know why:
a.) not implemented
b.) not planned

Stefan

Sebastien Laporte wrote:
> 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
> 
>  
>