Tuesday, 30 May 2017

Time-lapse

The Canon XC15 video camera has a time-lapse feature, so I gave it a try. This was around 2 hours worth of 3D printing...



The first issue was that the battery ran out just at the end, thankfully right at the end, so nothing lost, but this raises some questions. The card can take just under 2 hours of 4k video (256G), and the camera battery can last just under 2 hours (around 110 minutes). Unless using external power, the longest I can record for is the card or battery, and they are pretty much the same. So I could have just recorded, and then sped up later, deciding on what level of speed increase I want, making slowed for anything interesting that happens, etc. Much more flexible. So basically, the time-lapse feature really only makes any sense if I have power attached.

The other issue is that when it shut down for lack of power, it was not clean. It left the file broken. The only clever bit is that it knew this when I put in a new battery, and has a "data recovery" option if you try to play the video on the camera. That fixed it, but a tad messy.

2 comments:

  1. Having a 'recovery' process on power up after an unclean shutdown seems entirely sensible to me.

    Hell, it's how extremely expensive commercial RDBMS's work...

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    Replies
    1. Essential is some idiot pulls the battery, but for normal end of battery, which is much know is coming, I am surprised not a clean shutdown. Oh well. At least it was not lost...

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