libavfilter/af_asyncts.c:204: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `ff_filter_samples`.

libavfilter/af_asyncts.c:198:9: Assignment
196. 
197.         avresample_read(s->avr, (void**)buf_out->extended_data, out_size);
198.         buf_out->pts = s->pts;
             ^
199. 
200.         if (delta > 0) {

libavfilter/af_asyncts.c:204:9: Call
202.                                    delta, nb_channels, buf->format);
203.         }
204.         ff_filter_samples(outlink, buf_out);
             ^
205.     } else {
206.         av_log(ctx, AV_LOG_WARNING, "Non-monotonous timestamps, dropping "

libavfilter/audio.c:173:1: Parameter `samplesref->buf->refcount`
  171. }
  172. 
  173. void ff_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
       ^
  174. {
  175.     void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);

libavfilter/audio.c:203:9: Call
  201.             memcpy(link->cur_buf->extended_data[i], samplesref->extended_data[i], samplesref->linesize[0]);
  202. 
  203.         avfilter_unref_buffer(samplesref);
               ^
  204.     } else
  205.         link->cur_buf = 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)
