@@ -147,10 +147,14 @@ static int return_audio_frame(AVFilterContext *ctx)

 {

     AVFilterLink *link = ctx->outputs[0];

     FifoContext *s = ctx->priv;

-    AVFrame *head = s->root.next->frame;

+    AVFrame *head = s->root.next ? s->root.next->frame : NULL;

     AVFrame *out;

     int ret;

+    /* if head is NULL then we're flushing the remaining samples in out */

+    if (!head && !s->out)

+        return AVERROR_EOF;

+

     if (!s->out &&

         head->nb_samples >= link->request_samples &&

         calc_ptr_alignment(head) >= 32) {

@@ -227,8 +231,11 @@ static int request_frame(AVFilterLink *outlink)

     int ret = 0;

     if (!fifo->root.next) {

-        if ((ret = ff_request_frame(outlink->src->inputs[0])) < 0)

+        if ((ret = ff_request_frame(outlink->src->inputs[0])) < 0) {

+            if (ret == AVERROR_EOF && outlink->request_samples)

+                return return_audio_frame(outlink->src);

             return ret;

+        }

         av_assert0(fifo->root.next);

     }