const AVClass *class;
char *noise_str; ///< noise option string
double noise; ///< noise amplitude ratio
- int duration; ///< minimum duration of silence until notification
+ double duration; ///< minimum duration of silence until notification
int64_t nb_null_samples; ///< current number of continuous zero samples
int64_t start; ///< if silence is detected, this value contains the time of the first zero sample
int last_sample_rate; ///< last sample rate to check for sample rate changes
static const AVOption silencedetect_options[] = {
{ "n", "set noise tolerance", OFFSET(noise_str), AV_OPT_TYPE_STRING, {.str="-60dB"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "noise", "set noise tolerance", OFFSET(noise_str), AV_OPT_TYPE_STRING, {.str="-60dB"}, CHAR_MIN, CHAR_MAX, FLAGS },
- { "d", "set minimum duration in seconds", OFFSET(duration), AV_OPT_TYPE_INT, {.i64=2}, 0, INT_MAX, FLAGS },
- { "duration", "set minimum duration in seconds", OFFSET(duration), AV_OPT_TYPE_INT, {.i64=2}, 0, INT_MAX, FLAGS },
+ { "d", "set minimum duration in seconds", OFFSET(duration), AV_OPT_TYPE_DOUBLE, {.dbl=2.}, 0, 24*60*60, FLAGS },
+ { "duration", "set minimum duration in seconds", OFFSET(duration), AV_OPT_TYPE_DOUBLE, {.dbl=2.}, 0, 24*60*60, FLAGS },
{ NULL },
};
silence->noise_str);
return AVERROR(EINVAL);
}
+ av_opt_free(silence);
return 0;
}
+static char *get_metadata_val(AVFilterBufferRef *insamples, const char *key)
+{
+ AVDictionaryEntry *e = av_dict_get(insamples->metadata, key, NULL, 0);
+ return e && e->value ? e->value : NULL;
+}
+
static int filter_samples(AVFilterLink *inlink, AVFilterBufferRef *insamples)
{
int i;
silence->last_sample_rate = srate;
// TODO: support more sample formats
+ // TODO: document metadata
if (insamples->format == AV_SAMPLE_FMT_DBL) {
double *p = (double *)insamples->data[0];
if (!silence->start) {
silence->nb_null_samples++;
if (silence->nb_null_samples >= nb_samples_notify) {
- silence->start = insamples->pts - silence->duration / av_q2d(inlink->time_base);
- av_log(silence, AV_LOG_INFO,
- "silence_start: %s\n", av_ts2timestr(silence->start, &inlink->time_base));
+ silence->start = insamples->pts - (int64_t)(silence->duration / av_q2d(inlink->time_base) + .5);
+ av_dict_set(&insamples->metadata, "lavfi.silence_start",
+ av_ts2timestr(silence->start, &inlink->time_base), 0);
+ av_log(silence, AV_LOG_INFO, "silence_start: %s\n",
+ get_metadata_val(insamples, "lavfi.silence_start"));
}
}
} else {
- if (silence->start)
+ if (silence->start) {
+ av_dict_set(&insamples->metadata, "lavfi.silence_end",
+ av_ts2timestr(insamples->pts, &inlink->time_base), 0);
+ av_dict_set(&insamples->metadata, "lavfi.silence_duration",
+ av_ts2timestr(insamples->pts - silence->start, &inlink->time_base), 0);
av_log(silence, AV_LOG_INFO,
"silence_end: %s | silence_duration: %s\n",
- av_ts2timestr(insamples->pts, &inlink->time_base),
- av_ts2timestr(insamples->pts - silence->start, &inlink->time_base));
+ get_metadata_val(insamples, "lavfi.silence_end"),
+ get_metadata_val(insamples, "lavfi.silence_duration"));
+ }
silence->nb_null_samples = silence->start = 0;
}
}