5
2.8 Playing
DVDs
The DVDs produced by AfterBurner are formatted for playing on standard (consumer
market) DVD players. The disks may also be played on a PC with a suitable DVD player
application.
Playing time-lapse recordings
Time-lapse recordings appear to playback at a fast rate because frames have been
dropped from the recording. Most DVD players have the ability to replay in slow motion,
which will show the recording closer to real-time. E.g. playing a 24-hour time-lapse
recording (with a time-lapse rate of 1 in 12) at 1/8 speed will be close to real-time.
Playing back time-lapse recordings at normal rate has the advantage of showing all the
recorded information condensed into 2 to 3 hours, speeding-up the general review
process. Pause, slow motion forwards and backwards allows closer examination of any
specific events.
TIP
M
Ovation Systems offer a PC application called
DVD Explorer
, which is designed
specifically for the review of AfterBurner DVDs. DVD Explorer provides quick
navigation to any date and time on the DVD review along with the ability to single
step forwards and backwards. For more information see:
www.ovation.co.uk/DVD_Explorer/
Chapter Markers
Most DVD players have the ability to jump to DVD chapters so, to aid navigation,
AfterBurner adds a chapter maker to every 5 minutes of real-time video (approximately
24 markers per disk). With time-lapse recordings the time between markers is extended
by the time-lapse ratio e.g. in 24 hour mode the 5 minutes x 12 = 60 minutes.
If AfterBurner is set to alarm mode, a chapter marker is inserted at the point of each
alarm, up to a maximum of 99. If there are more than 99 alarms, the DVD file on the
internal hard disk is closed and a new file opened. Please note that when alarm mode
is active, chapter markers are no longer inserted every 5 minutes.
DVD Serial Number
Each DVD is burnt with unique DVD volume label. The format is DVDxxxx-yyyyyyyy,
where xxxx is the serial number of the AfterBurner and yyyyyyyy is a unique date code.
