How to get time info of transcript with PS?

[Pang Lei]

Hi, I want to use PocketSphinx to caption videos. Currently, I could generate
transcript with the following code based on PocketSphinx 0.7.

#include <pocketsphinx.h>
#include <stdio.h>

int
main(int argc, char* argv[])
{
    ps_decoder_t *ps;
    cmd_ln_t *config;
    FILE *fh;
    char const *hyp, *uttid;
    int16 buf[512];
    int rv;
    int32 score;
    char audiofile[100];

    int i;

    sprintf(audiofile, "second.wav");

    /*config = cmd_ln_init(NULL, ps_args(), TRUE,
                         "-hmm", MODELDIR "/hmm/en_US/hub4wsj_sc_8k",
                         "-lm", "TAR3837/3837.lm",
                         "-dict", "TAR3837/3837.dic",
                         NULL);*/
    config = cmd_ln_init(NULL, ps_args(), TRUE,
                "-hmm", "TAR3837/hub4_6000",
                "-lm", "TAR3837/bn99_64000_lm.dmp",
                "-dict", "TAR3837/cmudict.06d",
                NULL);
    //This model could not be loaded
    /*config = cmd_ln_init(NULL, ps_args(), TRUE,
                "-hmm", "/media/New Volume/Sphinx_Modes/en_broadcastnews_16k_ptm256_5000",
                "-lm", "TAR3837/bn99_64000_lm.arpa",
                "-dict", "TAR3837/cmudict.06d",
                NULL);*/
    if (config == NULL)
        return 1;

    ps = ps_init(config);
    if (ps == NULL)
        return 1;


    fh = fopen(audiofile, "rb");
    if (fh == NULL) {
        perror("Failed to open audio file");
        return 1;
    }

    rv = ps_decode_raw(ps, fh, NULL, -1);
    if (rv < 0)
        return 1;

    hyp = ps_get_hyp(ps, &score, &uttid);
    if (hyp == NULL)
        return 1;
    printf("Recognized: %s\n", hyp);

    /*fseek(fh, 0, SEEK_SET);
    rv = ps_start_utt(ps, NULL);
    if (rv < 0)
        return 1;

    while (!feof(fh)) {
        size_t nsamp;
        nsamp = fread(buf, 2, 512, fh);
        rv = ps_process_raw(ps, buf, nsamp, FALSE, FALSE);
    }

    rv = ps_end_utt(ps);
    if (rv < 0)
        return 1;

    hyp = ps_get_hyp(ps, &score, &uttid);
    if (hyp == NULL)
        return 1;

    printf("Recognized: %s\n", hyp);*/
    ps_free(ps);

    return 0;
}

However, I couldn't get the time information for each word. So, could anyone
tell me how can I get the time info? In addition, Could PocketSphinx split the
long text into sentence?

[Nickolay V. Shmyrev]

Read pocketsphinx_continuous source in pocketsphinx/src/programs/continuous.c
for details.