@item limit
Time limit for the pauses. Any pause longer than that will be considered
a timestamp discontinuity and reset the timer. Default is 2 seconds.
+@item speed
+Speed factor for processing. The value must be a float larger than zero.
+Values larger than 1.0 will result in faster than realtime processing,
+smaller will slow processing down. The @var{limit} is automatically adapted
+accordingly. Default is 1.0.
+
+A processing speed faster than what is possible without these filters cannot
+be achieved.
@end table
@anchor{select}
#include "libavutil/time.h"
#include "avfilter.h"
#include "internal.h"
+#include <float.h>
typedef struct RealtimeContext {
const AVClass *class;
int64_t delta;
int64_t limit;
+ double speed;
unsigned inited;
} RealtimeContext;
RealtimeContext *s = ctx->priv;
if (frame->pts != AV_NOPTS_VALUE) {
- int64_t pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
+ int64_t pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q) / s->speed;
int64_t now = av_gettime_relative();
int64_t sleep = pts - now + s->delta;
if (!s->inited) {
sleep = 0;
s->delta = now - pts;
}
- if (sleep > s->limit || sleep < -s->limit) {
+ if (FFABS(sleep) > s->limit / s->speed) {
av_log(ctx, AV_LOG_WARNING,
"time discontinuity detected: %"PRIi64" us, resetting\n",
sleep);
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
static const AVOption options[] = {
{ "limit", "sleep time limit", OFFSET(limit), AV_OPT_TYPE_DURATION, { .i64 = 2000000 }, 0, INT64_MAX, FLAGS },
+ { "speed", "speed factor", OFFSET(speed), AV_OPT_TYPE_DOUBLE, { .dbl = 1.0 }, DBL_MIN, DBL_MAX, FLAGS },
{ NULL }
};