SaturnV;
The B777 FDR measures 700 parameters, the QAR measures 2000. Is fuel temp a parameter measured by either device? What about OAT?
The QAR (for SESMA/FDM/FOQA work) will record as many parameters as the installed data frame is designed for, (QAR software) and at sample rates that the frame is similarly designed for. The DFDR is capable of this as well but typically DFDR data frames are smaller and at less frequent sample rates for many parameters. Sample rates of 16 frames per second are possible but are expensive in terms of storage and recording capability. Sample rates from once every fourth second to eight times per second are common in both DFDR and QAR dataframes.
All this is by way of clarifying that "700 parameters" and "2000 parameters" is not a fixed, determined number. Our own 777 QARS are taking in more than 2600 parameters and our 320 dataframe provides us with over 1700 parameters, far more than the DFDR.
More difficult to program, are text-string based parameters to record EICAS/ECAM messages and FMGC entries and readings. Not all ECAM messages are recorded I know, and I suspect not all EICAS messages are recorded either.
Very good animations may be created from such rich data-sources - I suspect this was done within hours of retrieval of the recorders, including the QAR which I would expect to be in good shape.