in short, a battery ran out whilst recording and when I scrambled for another and put it in I noticed a slight flickering on the viewfinder. I was worried that the flickering was recording but after turning off and back on the live view it was still doing it. I thought I best just leave it as what was happening was crucial. I have just looked back through the footage (cards have stupidly since been formatted as I forgot this happened) and the clip is only 4 secs long. Either this is before the battery out or this is all that was written to the card afterwards during the 6 mins of 'recording' when the screen was flickering slightly.
no files were missed during the copy from card to PC, the file numbering is sequential as you'd expect.
Has anyone had this happen before?