libavfilter/af_asyncts.c:132: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `ff_filter_samples`.

libavfilter/af_asyncts.c:131:9: Assignment
129.         avresample_convert(s->avr, (void**)buf->extended_data, buf->linesize[0],
130.                            nb_samples, NULL, 0, 0);
131.         buf->pts = s->pts;
             ^
132.         ff_filter_samples(link, buf);
133.         return 0;

libavfilter/af_asyncts.c:132:9: Call
130.                            nb_samples, NULL, 0, 0);
131.         buf->pts = s->pts;
132.         ff_filter_samples(link, buf);
             ^
133.         return 0;
134.     }

libavfilter/audio.c:175:1: Parameter `samplesref->buf->refcount`
  173. }
  174. 
  175. void ff_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
       ^
  176. {
  177.     void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);

libavfilter/audio.c:204:9: Call
  202.                         link->format);
  203. 
  204.         avfilter_unref_buffer(samplesref);
               ^
  205.     } else
  206.         buf_out = samplesref;

libavfilter/buffer.c:74:1: <LHS trace>
72. }
73. 
74. void avfilter_unref_buffer(AVFilterBufferRef *ref)
    ^
75. {
76.     if (!ref)

libavfilter/buffer.c:74:1: Parameter `ref->buf->refcount`
    72. }
    73. 
    74. void avfilter_unref_buffer(AVFilterBufferRef *ref)
        ^
    75. {
    76.     if (!ref)

libavfilter/buffer.c:78:11: Binary operation: ([0, +oo] - 1):unsigned32 by call to `ff_filter_samples` 
    76.     if (!ref)
    77.         return;
    78.     if (!(--ref->buf->refcount))
                  ^
    79.         ref->buf->free(ref->buf);
    80.     if (ref->extended_data != ref->data)
