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Posted: **06 Sep 2009 17:27**

Hi, I'd like to make a small media player based on libvlc (part of a bigger project), but I'm in some troubles:
1) How to make a playlist? I tried libvlc_media_list_t conversion to libvlc_media_t using libvlc_media_list_media(), but it didn't work, then playing libvlc_media_list_t in libvlc_media_list_player_t with the same result.
2) How to play an audio CD? I follow these instructions: http://wiki.videolan.org/LibVLC_SampleCode_Qt, playing "cdda:///dev/sr0" (same device as in vlc) - doesn't work for me.
2) The position slider from the example above restarts playback when moved.
I'm using Ubuntu 9.04, vlc 1.0.1. Thanks for any help

Posted: **09 Sep 2009 19:54**

1) Would something like libvlc_media_list_add_media, libvlc_media_list_count, libvlc_media_list_item_at_index and libvlc_media_list_index_of_item be what you're after?
2) I tried this and it seemed to work. The only warning I had was this which is alright since there is no audio CD in the drive (I don't have an audio CD handy, so I can't really test it right).
[0x7fecb8001490] cdda access warning: could not open /dev/sr0

Here's my snippet

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#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <vlc/vlc.h>

int main()
{
   libvlc_exception_t ex;
   libvlc_instance_t *vlc;
   libvlc_media_t *media;
   libvlc_media_player_t *player;
   const char* argv[] = {"--ignore-config", "-vvv"};
   int argc;

   argc = sizeof(argv) / sizeof(*argv);
   libvlc_exception_init (&ex);
   vlc = libvlc_new (argc, argv, &ex);
   libvlc_add_intf (vlc, "dummy", &ex);
   media = libvlc_media_new (vlc, "cdda:///dev/sr0", &ex);
   player = libvlc_media_player_new_from_media (media, &ex);
   libvlc_media_player_set_media (player, media, &ex);
   libvlc_media_player_play (player, &ex);

   libvlc_wait (vlc);

   libvlc_media_release (media);
   libvlc_release(vlc);

   return (EXIT_SUCCESS);
}

3) Can't help you there, I don't know the first thing about QT. Sorry

Hopes this helps a bit.

Posted: **11 Sep 2009 17:44**

1) I know about these functions, but I create media list and don't know what to do with it. Here is the code:

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    #define _GNU_SOURCE
    #include <stdio.h>
    #include <string.h>
    #include <stdlib.h>
    #include <vlc/vlc.h>

    int main()
    {
       libvlc_exception_t ex;
       libvlc_instance_t *vlc;
       libvlc_media_t *media;
       libvlc_media_player_t *player;
       libvlc_media_list_t *media_list;
       libvlc_media_list_player_t *list_player;
       const char* argv[] = {"--ignore-config", "-vvv"};
       int argc;

       argc = sizeof(argv) / sizeof(*argv);
       libvlc_exception_init (&ex);
       vlc = libvlc_new (argc, argv, &ex);
       libvlc_add_intf (vlc, "dummy", &ex);
       list_player = libvlc_media_list_player_new(vlc, &ex);
       media_list = libvlc_media_list_new(vlc, &ex);
       media = libvlc_media_new (vlc, "music/media1.mp4", &ex);
       libvlc_media_list_add_media(media_list, media, &ex);
       media = libvlc_media_new (vlc, "music/media2.mp4", &ex);
       libvlc_media_list_add_media(media_list, media, &ex);
       player = libvlc_media_player_new_from_media (media, &ex);
       libvlc_media_list_player_set_media_player(list_player, player, &ex);
       libvlc_media_list_player_play (list_player, &ex);

       libvlc_wait (vlc);

       libvlc_media_release (media);
       libvlc_release(vlc);

       return (EXIT_SUCCESS);
    }

It doesn't work, doesn't even write out any error.

2) I get these errors:

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(...)
[0x103c478] main stream debug: pre buffering
[0x103c478] main stream error: cannot pre fill buffer
[0x103aa38] main input warning: cannot create a stream_t from access
[0x1040858] main access debug: removing module "cdda"
(...)

3) Problem solved, I found a bug in sample code, changePosition function:

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    float pos=(newPosition)/POSITION_RESOLUTION;

is allways 0 due to integer division, this is the right way:

Code: Select all

    float pos=(float)newPosition/POSITION_RESOLUTION;

Posted: **13 Sep 2009 11:24**

Does vlc have D-Bus API? I found this: http://wiki.videolan.org/DBus-spec

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