@@ -4643,6 +4643,9 @@ streams in each segment. Default is 1.

 Set the number of output audio streams, that is also the number of video

 streams in each segment. Default is 0.

+@item unsafe

+Activate unsafe mode: do not fail if segments have a different format.

+

 @end table

 The filter has @var{v}+@var{a} outputs: first @var{v} video outputs, then

@@ -42,6 +42,7 @@ typedef struct {

     unsigned cur_idx; /**< index of the first input of current segment */

     int64_t delta_ts; /**< timestamp to add to produce output timestamps */

     unsigned nb_in_active; /**< number of active inputs in current segment */

+    unsigned unsafe;

     struct concat_in {

         int64_t pts;

         int64_t nb_frames;

@@ -64,6 +65,9 @@ static const AVOption concat_options[] = {

     { "a", "specify the number of audio streams",

       OFFSET(nb_streams[AVMEDIA_TYPE_AUDIO]),

       AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A|F},

+    { "unsafe", "enable unsafe mode",

+      OFFSET(unsafe),

+      AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A|A|F},

     { 0 }

 };

@@ -143,7 +147,8 @@ static int config_output(AVFilterLink *outlink)

                    ctx->input_pads[out_no].name, outlink->w, outlink->h,

                    outlink->sample_aspect_ratio.num,

                    outlink->sample_aspect_ratio.den);

-            return AVERROR(EINVAL);

+            if (!cat->unsafe)

+                return AVERROR(EINVAL);

         }

     }