avconv.c:955: error: Uninitialized Value
  The value read from *size was never initialized.

avconv.c:955:17: 
953.                     exit(1);
954.                 }
955.                 *size += ret;
                     ^
956.                 if (ost->logfile && enc->stats_out) {
957.                     fprintf(ost->logfile, "%s", enc->stats_out);
