libavcodec/extract_extradata_bsf.c:125: error: Uninitialized Value
  The value read from filtered_buf was never initialized.

libavcodec/extract_extradata_bsf.c:125:13: 
123.         if (s->remove) {
124.             av_buffer_unref(&pkt->buf);
125.             pkt->buf  = filtered_buf;
                 ^
126.             pkt->data = filtered_buf->data;
127.             pkt->size = filtered_data - filtered_buf->data;
