avfilter: properly set SAR for A->V filters

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavfilter/avf_abitscope.c

@@ -166,6 +166,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
         memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w * 4);
 
     outpicref->pts = insamples->pts;
+    outpicref->sample_aspect_ratio = (AVRational){1,1};
+
     switch (insamples->format) {
     case AV_SAMPLE_FMT_S16P:
         for (ch = 0; ch < inlink->channels; ch++) {

libavfilter/avf_avectorscope.c

@@ -246,6 +246,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
             return AVERROR(ENOMEM);
         }
 
+        s->outpicref->sample_aspect_ratio = (AVRational){1,1};
         for (i = 0; i < outlink->h; i++)
             memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w * 4);
     }

libavfilter/avf_showfreqs.c

@@ -434,6 +434,7 @@ static int plot_freqs(AVFilterLink *inlink, AVFrame *in)
 
     av_free(colors);
     out->pts = in->pts;
+    out->sample_aspect_ratio = (AVRational){1,1};
     return ff_filter_frame(outlink, out);
 }
 

libavfilter/avf_showspectrum.c

@@ -306,6 +306,7 @@ static int config_output(AVFilterLink *outlink)
 
     outlink->w = s->w;
     outlink->h = s->h;
+    outlink->sample_aspect_ratio = (AVRational){1,1};
 
     if (s->legend) {
         s->start_x = log10(inlink->sample_rate) * 25;
@@ -422,7 +423,7 @@ static int config_output(AVFilterLink *outlink)
             ff_get_video_buffer(outlink, outlink->w, outlink->h);
         if (!outpicref)
             return AVERROR(ENOMEM);
-        outlink->sample_aspect_ratio = (AVRational){1,1};
+        outpicref->sample_aspect_ratio = (AVRational){1,1};
         for (i = 0; i < outlink->h; i++) {
             memset(outpicref->data[0] + i * outpicref->linesize[0],   0, outlink->w);
             memset(outpicref->data[1] + i * outpicref->linesize[1], 128, outlink->w);

libavfilter/f_ebur128.c

@@ -269,6 +269,7 @@ static int config_video_output(AVFilterLink *outlink)
     }
     outlink->w = ebur128->w;
     outlink->h = ebur128->h;
+    outlink->sample_aspect_ratio = (AVRational){1,1};
 
 #define PAD 8
 
@@ -299,7 +300,7 @@ static int config_video_output(AVFilterLink *outlink)
         ff_get_video_buffer(outlink, outlink->w, outlink->h);
     if (!outpicref)
         return AVERROR(ENOMEM);
-    outlink->sample_aspect_ratio = (AVRational){1,1};
+    outpicref->sample_aspect_ratio = (AVRational){1,1};
 
     /* init y references values (to draw LU lines) */
     ebur128->y_line_ref = av_calloc(ebur128->graph.h + 1, sizeof(*ebur128->y_line_ref));