Well pumping of fluids having low hydrostatic pressure is provided through a combination of jet pumping and gas assisted lifting. In some embodiments, before the peripheral storage device is corrupted by the failed outgoing data transfer operation, one or more recovery data objects are stored on the host-side. The second pictures are coded by bidirectional inter-picture predictive coding using the first pictures or locally-decoded pictures of the first pictures as the reference pictures, to obtain a moving-picture bitstream.