extract.c

#include <stdio.h>
#include <ffms.h>

int main () {

        FFMS_Init(0);

        char errmsg[1024];
        FFMS_ErrorInfo errinfo;
        errinfo.Buffer      = errmsg;
        errinfo.BufferSize  = sizeof(errmsg);
        errinfo.ErrorType   = FFMS_ERROR_SUCCESS;
        errinfo.SubType     = FFMS_ERROR_SUCCESS;

        /* some source file */
        const char *sourcefile = "trl.ogg";

        FFMS_Indexer *indexer = FFMS_CreateIndexer(sourcefile, &errinfo);
        if (indexer == NULL) {
                fprintf(stderr, "indexer creation failed\n");
        }

        int numtracks = FFMS_GetNumTracksI(indexer);

        FFMS_Index *index = FFMS_DoIndexing(indexer, 0, 0, NULL, NULL, FFMS_IEH_ABORT, NULL, NULL, &errinfo);

        if (index == NULL) {
                fprintf( stderr, "indexing failed\n" );
        }

        int trackno = FFMS_GetFirstTrackOfType(index, FFMS_TYPE_AUDIO, &errinfo);
        if (trackno <0) {
                fprintf(stderr, "getting track number failed\n");
        }


        FFMS_AudioSource *audiosource = FFMS_CreateAudioSource(sourcefile, trackno, index, &errinfo);
        if (audiosource == NULL) {
                fprintf(stderr, "audio source creation failed\n");
        }

        FFMS_DestroyIndex(index);

        FFMS_DestroyAudioSource(audiosource);
        return 0;
}