Troubleshooting : Solutions by issue type : Video viewing issues
 
Video viewing issues
If you can connect to FortiRecorder, and your cameras can connect with your FortiRecorder, but you cannot view video that is streamed or stored on FortiRecorder, first check that you have installed software that can view live streams (which use RTP) and files (which use .mp4 format). For requirements, see “Configuring video profiles” and “The notification window will be replaced with a video clip player.”.
 
Different media players can interfere with each other. By default, some installers take file type associations previously belonging to other players and re-assign them to the new software. If you installed software to view downloaded video files, for example, and suddenly could no longer view live video streams, you might need to fix the file associations for RTP and/or MP4.
If you have installed a suitable media player but still cannot view the video, try clicking the panel arrows to hide and then show the panel again. For some Windows computers, this can solve the problem. (This QuickTime issue does not affect Mac OS X computers.)
If this does not trigger the video to play, make sure that its codec software does not have any conflicts, and is capable of displaying H.264 video. Media players’ codec plug-ins can come from many sources, and if you have installed multiple codecs for the same format, display problems can arise.