|
|
| (10 intermediate revisions by 3 users not shown) |
| Line 1: |
Line 1: |
| − | This sample code will generate a thumbnail from any media.
| + | {{Lowercase}} |
| − | It can be used by nautilus instead of totem-video-thumbnailer
| + | Moved [http://git.videolan.org/?p=vlc.git;a=blob;f=doc/libvlc/vlc-thumb.c]. |
| − | /* Copyright [[User:Funman|Rafaël Carré]] (licence [http://en.wikipedia.org/wiki/WTFPL WTFPL]) */
| |
| − | <pre>
| |
| − | #include <stdio.h>
| |
| − | #include <vlc/libvlc.h>
| |
| − | #include <stdlib.h>
| |
| − | #include <string.h>
| |
| − | #include <unistd.h>
| |
| | | | |
| − | /* position to seek to (out of 1.) */
| + | [[Category:libVLC]] |
| − | #define POS 0.3
| |
| − | | |
| − | /* for the callback to notify the main thread that the position changed */
| |
| − | static int fini = 0;
| |
| − | | |
| − | /* to catch problems */
| |
| − | static libvlc_exception_t ex;
| |
| − | | |
| − | /* "position changed" callback */
| |
| − | static void callback( const libvlc_event_t *ev, void *param )
| |
| − | {
| |
| − | if( ev->type == libvlc_MediaInstancePositionChanged )
| |
| − | {
| |
| − | /* XXX: add a tolerance ? (POS +/- 10%) */
| |
| − | if( ev->u.media_instance_position_changed.new_position >= POS )
| |
| − | fini = 1;
| |
| − | }
| |
| − | else
| |
| − | {
| |
| − | fprintf( stderr, "Error: catched event %s\n",
| |
| − | libvlc_event_type_name( ev->type ) );
| |
| − | }
| |
| − | }
| |
| − | | |
| − | static void catch (void)
| |
| − | {
| |
| − | if (libvlc_exception_raised (&ex))
| |
| − | {
| |
| − | fprintf (stderr, "Exception: %s\n",
| |
| − | libvlc_exception_get_message (&ex));
| |
| − | exit(1);
| |
| − | }
| |
| − | | |
| − | libvlc_exception_clear (&ex);
| |
| − | }
| |
| − | | |
| − | #define TEMP "/tmp/vlc-video-thumbnailer.png"
| |
| − | | |
| − | #define usage() \
| |
| − | fprintf( stderr, \
| |
| − | "Usage: %s input output\n" \
| |
| − | "input being any video VLC can read, and output a png file\n" \
| |
| − | , argv[0] )
| |
| − | | |
| − | int main( int argc, const char **argv )
| |
| − | {
| |
| − | if( argc != 3 && argc != 5 )
| |
| − | {
| |
| − | usage();
| |
| − | if( argc == 2 && ( !strcmp( argv[1], "-h" ) || strcmp( argv[1], "--help") ) )
| |
| − | return 0;
| |
| − | else
| |
| − | return 1;
| |
| − | }
| |
| − | | |
| − | const char *input = argv[1];
| |
| − | const char *output = argv[2];
| |
| − | int i_width = 0;
| |
| − | int i_height = 0;
| |
| − | | |
| − | if( argc == 5 )
| |
| − | {
| |
| − | if( strncmp( argv[1], "-s", 3 ) )
| |
| − | {
| |
| − | usage();
| |
| − | return 1;
| |
| − | }
| |
| − | i_width = atoi( argv[2] );
| |
| − | input = argv[3];
| |
| − | output = argv[4];
| |
| − | }
| |
| − | | |
| − | libvlc_exception_init( &ex );
| |
| − | | |
| − | const char* const args[] = {
| |
| − | "-I", "dummy", /* no interface */
| |
| − | "--vout", "dummy", /* we don't want video (output) */
| |
| − | "--no-audio", /* we don't want audio */
| |
| − | "--verbose=1", /* show only errors & warnings */
| |
| − | "--no-media-library", /* don't want that */
| |
| − | "--services-discovery", "", /* nor that */
| |
| − | "--no-video-title-show", /* nor the filename displayed */
| |
| − | "--no-stats", /* no stats */
| |
| − | "--no-sub-autodetect", /* don't want subtitles */
| |
| − | "--control", "", /* don't want interface (again) */
| |
| − | "--no-inhibit", /* i say no interface ! */
| |
| − | "--no-disable-screensaver", /* wanna fight ? */
| |
| − | "--extraintf", "" /* ok, it will be a piece of cake */
| |
| − | };
| |
| − | | |
| − | int nargs = sizeof(args) / sizeof(args[0]);
| |
| − | libvlc_instance_t *libvlc = libvlc_new( nargs, args, &ex );
| |
| − | catch();
| |
| − | | |
| − | libvlc_media_instance_t *mi;
| |
| − | libvlc_media_descriptor_t *md;
| |
| − | | |
| − | md = libvlc_media_descriptor_new( libvlc, input, &ex );
| |
| − | catch();
| |
| − |
| |
| − | mi = libvlc_media_instance_new_from_media_descriptor( md, &ex );
| |
| − | catch();
| |
| − |
| |
| − | libvlc_media_descriptor_release( md );
| |
| − | | |
| − | libvlc_media_instance_play( mi, &ex );
| |
| − | catch();
| |
| − | | |
| − | /* avoid introduction */
| |
| − | libvlc_media_instance_set_position( mi, POS, &ex );
| |
| − | catch();
| |
| − | | |
| − | libvlc_event_manager_t *em;
| |
| − | em = libvlc_media_instance_event_manager( mi, &ex );
| |
| − | catch();
| |
| − | | |
| − | libvlc_event_attach( em, libvlc_MediaInstancePositionChanged,
| |
| − | callback, NULL, &ex );
| |
| − | catch();
| |
| − | | |
| − | int max = 10; /* don't wait more than 10s */
| |
| − | while( !fini && max-- ) /* wait for the event */
| |
| − | sleep( 1 );
| |
| − | | |
| − | libvlc_event_detach( em, libvlc_MediaInstancePositionChanged,
| |
| − | callback, NULL, &ex );
| |
| − | catch();
| |
| − | | |
| − | libvlc_video_take_snapshot( mi, TEMP, i_width, i_height, &ex );
| |
| − | catch();
| |
| − | | |
| − | sleep( 1 ); /* wait for the snapshot to be written */
| |
| − | | |
| − | char *mv;
| |
| − | if( asprintf( &mv, "mv %s %s", TEMP, output ) == -1 )
| |
| − | return 1;
| |
| − | system( mv );
| |
| − | free( mv );
| |
| − | | |
| − | libvlc_media_instance_stop( mi, &ex );
| |
| − | catch();
| |
| − | | |
| − | libvlc_media_instance_release( mi );
| |
| − | | |
| − | libvlc_release( libvlc, &ex );
| |
| − | catch();
| |
| − | | |
| − | return 0;
| |
| − | }</pre>
| |
