@@ -154,6 +154,15 @@ static int query_formats(AVFilterContext *ctx)

     return 0;

 }

+static av_cold int init(AVFilterContext *ctx)

+{

+    ShowFreqsContext *s = ctx->priv;

+

+    s->pts = AV_NOPTS_VALUE;

+

+    return 0;

+}

+

 static int config_output(AVFilterLink *outlink)

 {

     AVFilterContext *ctx = outlink->src;

@@ -423,8 +432,12 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)

     AVFilterContext *ctx = inlink->dst;

     ShowFreqsContext *s = ctx->priv;

     AVFrame *fin = NULL;

+    int consumed = 0;

     int ret = 0;

+    if (s->pts == AV_NOPTS_VALUE)

+        s->pts = in->pts - av_audio_fifo_size(s->fifo);

+

     av_audio_fifo_write(s->fifo, (void **)in->extended_data, in->nb_samples);

     while (av_audio_fifo_size(s->fifo) >= s->win_size) {

         fin = ff_get_audio_buffer(inlink, s->win_size);

@@ -433,8 +446,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)

             goto fail;

         }

-        fin->pts = s->pts;

-        s->pts += s->hop_size;

+        fin->pts = s->pts + consumed;

+        consumed += s->hop_size;

         ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, s->win_size);

         if (ret < 0)

             goto fail;

@@ -447,6 +460,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)

     }

 fail:

+    s->pts = AV_NOPTS_VALUE;

     av_frame_free(&fin);

     av_frame_free(&in);

     return ret;

@@ -491,6 +505,7 @@ static const AVFilterPad showfreqs_outputs[] = {

 AVFilter ff_avf_showfreqs = {

     .name          = "showfreqs",

     .description   = NULL_IF_CONFIG_SMALL("Convert input audio to a frequencies video output."),

+    .init          = init,

     .uninit        = uninit,

     .query_formats = query_formats,

     .priv_size     = sizeof(ShowFreqsContext),