High frame rate infrared focal plane array detectors have important applications in infrared weapon systems, spectral imaging, and high-speed temperature measurement. Currently, in our country, lag in high frame rate infrared focal plane array technology limits the development of high performance infrared weapon, spectral imaging, and high-speed temperature measurement technologies. Targeting at high frame rate infrared imaging applications, a 384×288 array, 25-μm pitch digital readout integrated circuit is designed and fabricated, and then, hybridized to a long-wave HgCdTe detector array. A high frame rate 384×288 long-wave digital infrared detector assembly is implemented by assembling the hybrid focal plane array in a metal vacuum dewar and coupling with a Stirling cryocooler. Measurement results demonstrate that the maximum frame rate is 1012 Hz, noise equivalent temperature difference (NETD) is 16.8 mK, and dynamic range reaches 95.2 dB. An ignition of a lighter is successfully captured by the developed detector. In addition, the details of flame growth and spurting are clearly presented, and a good imaging effect is obtained.