My Acorn Ltl-5210A set for overnight and can take up to 40+ videos, depending on the activity of wild life. The camera has started doing a couple of normal length videos, followed by a quite a few that are less than a couple of seconds, then go back to normal length.
I have the camera set a video size 640 x 480, length AVI 30s, interval 1 sec.
I have been trying to think of reasons - It is not that it started and there was nothing to film - I have had lots of 30 sec videos of just rain, leaves blowing, or just the scenery.
Maybe it is low power - it seems to happen when there are just two bars showing for the battery (shows 3 bars when full). This also puzzles me as I have the extra power unit fixed to the back which takes 6 batteries, but have a feeling that does not work but don't know how to test it.
Nelly, I have found a somewhat similar effect on our trail camera. We did not have the camera reverting to normal function but have sometimes had close to 70 videos in a night, most showing nothing of interest and anywhere from about 5 seconds to about 15 seconds in length (our camera is normally set to record videos of 60s). I don't know the reason but I suspected low power.
We use recharagble batteries but the charger is fairly basic and I wondered if it wasn't charging properly. What appeared to be a fully charged set of batteries when I put the camera out showed very little charge in the morning.
At the moment I'm trying a more sophisticated charger (Technoline BL700) that cycles the batteries through a discharge/recharge sequence until they reach optimum charge. I don't know if this will make a difference but it is interesting that the basic charger would apparent fully charge the batteries in about 3 -4 hours, whereas the current charger has taken over two days to get two batteries up to full charge.
Just had a look around the Web and found this from a site with info on potential problems -
"Batteries and Video Length. If the camera is taking videos which are a variable and shorter time than you have set, it will be because the battery voltage has dropped and the camera is attempting to save battery power."
Thanks Dave interesting. I must have missed it when trolling through Ron Bury's site. Like the sound of the charger you are trying. At the moment I just use ordinary batteries, which gets very expensive with 3 cameras on the go, especially when you cant see which is the battery that has lost its charge.