If you connect to a Panasonic NW502 camera and the software displays JPEG while MPEG-4 is greyed out, you must enable H.264 video encoding. To do this, browse to the NW502 camera configurator and open the Image page. Then change the Video Encoding Format from MPEG-4 to H.264.
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Panasonic-NW502-JPEG-versus-H.264-Issue.pdf