libavfilter/af_asyncts.c:215: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `ff_filter_samples`.

libavfilter/af_asyncts.c:209:9: Assignment
207. 
208.         avresample_read(s->avr, (void**)buf_out->extended_data, out_size);
209.         buf_out->pts = s->pts;
             ^
210. 
211.         if (delta > 0) {

libavfilter/af_asyncts.c:215:15: Call
213.                                    delta, nb_channels, buf->format);
214.         }
215.         ret = ff_filter_samples(outlink, buf_out);
                   ^
216.         if (ret < 0)
217.             goto fail;

libavfilter/audio.c:155:1: Parameter `samplesref->buf->refcount`
  153. }
  154. 
  155. int ff_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
       ^
  156. {
  157.     int (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);

libavfilter/audio.c:184:9: Call
  182.                         link->format);
  183. 
  184.         avfilter_unref_buffer(samplesref);
               ^
  185.     } else
  186.         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)
