Dataformat

In order to provide the best possible quality to the research community and the DIRAC consortium, all the recordings are stored in an uncompressed data format. In particular, the Portable Network Graphics (PNG) format is used camera channel-wise on a frame by frame basis with a 1920x1080 resolution. For the four microfon channels, all recordings are stored as wav-files with 48kHz sampling rate and a sample resolution of 32 bit floating-point.

Wikipedia: Portable Network Graphics