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| − | This sample code will generate a thumbnail from any media.
| + | {{Lowercase}} |
| − | /* Copyright [[User:Funman|Rafael Carre]] (licence [http://en.wikipedia.org/wiki/WTFPL WTFPL]) */
| + | Moved [http://git.videolan.org/?p=vlc.git;a=blob;f=doc/libvlc/vlc-thumb.c]. |
| − | <pre>
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| − | #include <stdio.h>
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| − | #include <vlc/libvlc.h>
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| − | #include <stdlib.h>
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| − | #include <string.h>
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| − | #include <unistd.h>
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| | | | |
| − | static libvlc_exception_t ex;
| + | [[Category:libVLC]] |
| − | | |
| − | static void catch (void)
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| − | {
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| − | if (libvlc_exception_raised (&ex))
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| − | {
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| − | fprintf (stderr, "Exception: %s\n",
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| − | libvlc_exception_get_message (&ex));
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| − | exit(1);
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| − | }
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| − | | |
| − | libvlc_exception_clear (&ex);
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| − | }
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| − | | |
| − | #define TEMP "/tmp/vlc-video-thumbnailer.png"
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| − | | |
| − | #define usage() \
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| − | fprintf( stderr, \
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| − | "Usage: %s input output\n" \
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| − | "input being any video VLC can read, and output a png file\n" \
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| − | , argv[0] )
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| − | | |
| − | int main( int argc, const char **argv )
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| − | {
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| − | if( argc != 3 && argc != 5 )
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| − | {
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| − | usage();
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| − | if( argc == 2 && ( !strcmp( argv[1], "-h" ) || strcmp( argv[1], "--help") ) )
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| − | return 0;
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| − | else
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| − | return 1;
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| − | }
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| − | | |
| − | const char *input = argv[1];
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| − | const char *output = argv[2];
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| − | int i_width = 0;
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| − | int i_height = 0;
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| − | | |
| − | if( argc == 5 )
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| − | {
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| − | if( memcmp( argv[1], "-s", 3 ) != 0 )
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| − | {
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| − | usage();
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| − | return 1;
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| − | }
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| − | i_width = atoi( argv[2] );
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| − | input = argv[3];
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| − | output = argv[4];
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| − | }
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| − | | |
| − | libvlc_exception_init( &ex );
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| − | | |
| − | const char* const args[] = {
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| − | "-I", "dummy", /* no interface */
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| − | "--vout", "dummy", /* we don't want video */
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| − | "--no-audio", /* we don't want audio */
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| − | "--verbose=1", /* show only errors & warnings */
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| − | "--no-media-library", /* don't want that */
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| − | "--services-discovery", "", /* nor that */
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| − | "--no-video-title-show", /* nor the filename displayed */
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| − | "--no-sub-autodetect", /* don't want subtitles */
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| − | "--control", "", /* don't want interface */
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| − | "--extraintf", "" /* AT ALL ! */
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| − | };
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| − | | |
| − | int nargs = sizeof(args) / sizeof(args[0]);
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| − | libvlc_instance_t *libvlc = libvlc_new( nargs, args, &ex );
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| − | catch();
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| − | | |
| − | libvlc_media_instance_t *mi;
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| − | libvlc_media_descriptor_t *md;
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| − | | |
| − | md = libvlc_media_descriptor_new( libvlc, input, &ex );
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| − | catch();
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| − |
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| − | mi = libvlc_media_instance_new_from_media_descriptor( md, &ex );
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| − | catch();
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| − |
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| − | libvlc_media_descriptor_release( md );
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| − | | |
| − | libvlc_media_instance_play( mi, &ex );
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| − | catch();
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| − | | |
| − | /* go to position 30% to avoid introductions */
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| − | libvlc_media_instance_set_position( mi, 0.30, &ex );
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| − | catch();
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| − | | |
| − | /* leave vlc some time to start playing */
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| − | sleep(1); /* TODO: wait for a status change */
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| − | | |
| − | libvlc_video_take_snapshot( mi, TEMP, i_width, i_height, &ex );
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| − | catch();
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| − | | |
| − | sleep(1);
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| − | | |
| − | /* We use a destination snapshot with a .png extension, since libvlc use the extension to detect the encoder used */
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| − | char *mv;
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| − | if( asprintf( &mv, "mv %s %s", TEMP, output ) == -1 )
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| − | return 1;
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| − | system( mv );
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| − | free( mv );
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| − | | |
| − | libvlc_media_instance_stop( mi, &ex );
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| − | catch();
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| − | | |
| − | libvlc_media_instance_release( mi );
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| − | | |
| − | libvlc_release( libvlc, &ex );
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| − | catch();
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| − | | |
| − | return 0;
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| − | }
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| − | </pre>
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