@@ -175,29 +175,31 @@ static int request_frame(AVFilterLink *outlink)

     ret = ff_request_frame(ctx->inputs[0]);

     if (ret == AVERROR_EOF && !s->flushed) {

-        AVFrame *out = ff_get_audio_buffer(inlink, 1);

-        int nb_samples;

+        if (rubberband_available(s->rbs) > 0) {

+            AVFrame *out = ff_get_audio_buffer(inlink, 1);

+            int nb_samples;

-        if (!out)

-            return AVERROR(ENOMEM);

-

-        rubberband_process(s->rbs, (const float *const *)out->data, 1, 1);

-        av_frame_free(&out);

-        s->flushed = 1;

-        nb_samples = rubberband_available(s->rbs);

-

-        if (nb_samples > 0) {

-            out = ff_get_audio_buffer(inlink, nb_samples);

             if (!out)

                 return AVERROR(ENOMEM);

-            out->pts = av_rescale_q(s->nb_samples_out,

-                         (AVRational){ 1, outlink->sample_rate },

-                         outlink->time_base);

-            nb_samples = rubberband_retrieve(s->rbs, (float *const *)out->data, nb_samples);

-            out->nb_samples = nb_samples;

-            ret = ff_filter_frame(outlink, out);

-            s->nb_samples_out += nb_samples;

+

+            rubberband_process(s->rbs, (const float *const *)out->data, 1, 1);

+            av_frame_free(&out);

+            nb_samples = rubberband_available(s->rbs);

+

+            if (nb_samples > 0) {

+                out = ff_get_audio_buffer(inlink, nb_samples);

+                if (!out)

+                    return AVERROR(ENOMEM);

+                out->pts = av_rescale_q(s->nb_samples_out,

+                             (AVRational){ 1, outlink->sample_rate },

+                             outlink->time_base);

+                nb_samples = rubberband_retrieve(s->rbs, (float *const *)out->data, nb_samples);

+                out->nb_samples = nb_samples;

+                ret = ff_filter_frame(outlink, out);

+                s->nb_samples_out += nb_samples;

+            }

         }

+        s->flushed = 1;

         av_log(ctx, AV_LOG_DEBUG, "nb_samples_in %"PRId64" nb_samples_out %"PRId64"\n",

                                    s->nb_samples_in, s->nb_samples_out);

     }