 can be read on any operating system. The main drawback is that each frame
 is encoded independently, resulting in increased file size. The advantage
 over storing as a directory of images is that a single large file is
 created. Currently, either uncompressed, jpg or png compressed frames
 are supported. The seq file format is modeled after the Norpix seq format
 (in fact this reader can be used to read some Norpix seq files). The
 actual work of reading/writing seq files is done by seqReaderPlugin a