X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavfilter%2Fvf_cropdetect.c;h=5ae87cad2d7bbc4b6dd07e4dff6aca990f365bd8;hb=930391e5988abe126d29c5e9b09fab459e0b8936;hp=7c7d0b953ab00a1acc6f15c0ff055d3744d6ab78;hpb=06476249cd2332e30b66576633b2827adf3478dd;p=ffmpeg

diff --git a/libavfilter/vf_cropdetect.c b/libavfilter/vf_cropdetect.c
index 7c7d0b953ab..5ae87cad2d7 100644
--- a/libavfilter/vf_cropdetect.c
+++ b/libavfilter/vf_cropdetect.c
@@ -37,6 +37,7 @@ typedef struct CropDetectContext {
     int x1, y1, x2, y2;
     float limit;
     int round;
+    int skip;
     int reset_count;
     int frame_nb;
     int max_pixsteps[4];
@@ -127,10 +128,10 @@ static av_cold int init(AVFilterContext *ctx)
 {
     CropDetectContext *s = ctx->priv;
 
-    s->frame_nb = -2;
+    s->frame_nb = -1 * s->skip;
 
-    av_log(ctx, AV_LOG_VERBOSE, "limit:%f round:%d reset_count:%d\n",
-           s->limit, s->round, s->reset_count);
+    av_log(ctx, AV_LOG_VERBOSE, "limit:%f round:%d skip:%d reset_count:%d\n",
+           s->limit, s->round, s->skip, s->reset_count);
 
     return 0;
 }
@@ -167,7 +168,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
     int outliers, last_y;
     int limit = lrint(s->limit);
 
-    // ignore first 2 frames - they may be empty
+    // ignore first s->skip frames
     if (++s->frame_nb > 0) {
         metadata = &frame->metadata;
 
@@ -247,6 +248,7 @@ static const AVOption cropdetect_options[] = {
     { "limit", "Threshold below which the pixel is considered black", OFFSET(limit),       AV_OPT_TYPE_FLOAT, { .dbl = 24.0/255 }, 0, 65535, FLAGS },
     { "round", "Value by which the width/height should be divisible", OFFSET(round),       AV_OPT_TYPE_INT, { .i64 = 16 }, 0, INT_MAX, FLAGS },
     { "reset", "Recalculate the crop area after this many frames",    OFFSET(reset_count), AV_OPT_TYPE_INT, { .i64 = 0 },  0, INT_MAX, FLAGS },
+    { "skip",  "Number of initial frames to skip",                    OFFSET(skip),        AV_OPT_TYPE_INT, { .i64 = 2 },  0, INT_MAX, FLAGS },
     { "reset_count", "Recalculate the crop area after this many frames",OFFSET(reset_count),AV_OPT_TYPE_INT,{ .i64 = 0 },  0, INT_MAX, FLAGS },
     { "max_outliers", "Threshold count of outliers",                  OFFSET(max_outliers),AV_OPT_TYPE_INT, { .i64 = 0 },  0, INT_MAX, FLAGS },
     { NULL }