diff options
| author | Moritz Barsnick <barsnick@gmx.net> | 2019-05-01 16:12:59 +0200 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2019-05-04 19:39:38 +0200 |
| commit | 98541f70320bc42be277f0fadf74639c190bb827 (patch) | |
| tree | 24b14114bfd344e035c232062bebbde72df1e9c1 | |
| parent | e94447cd49e117aef26cc46c23c54d38eea56d5f (diff) | |
| download | ffmpeg-98541f70320bc42be277f0fadf74639c190bb827.tar.gz | |
avfilter/f_realtime: add option to scale speed
| -rw-r--r-- | doc/filters.texi | 8 | ||||
| -rw-r--r-- | libavfilter/f_realtime.c | 7 |
2 files changed, 13 insertions, 2 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index cd82869849..2f9333c3f3 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -21136,6 +21136,14 @@ They accept the following options: @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} diff --git a/libavfilter/f_realtime.c b/libavfilter/f_realtime.c index 171c16aaaa..6fd3559dac 100644 --- a/libavfilter/f_realtime.c +++ b/libavfilter/f_realtime.c @@ -22,11 +22,13 @@ #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; @@ -36,7 +38,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame) 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) { @@ -44,7 +46,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame) 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); @@ -65,6 +67,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame) #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 } }; |