How to assemble timelapse
Assuming these have, or can be given, consecutively numbered file names you can do this easily using ffmpeg, avconv and similar utilities. Most have builds for Mac, Windows and Linux.

The choice of frame rate is up to you, and really affects only the total length of the output file (at 30fps, 280000 frames is 2.6 hours; at 24 fps it's 3.24 hours). If you have a target device or platform that needs a specific rate, use that.

You may want to decimate the source stack -- that's a lot of pictures and it's unlikely to be interesting for the entire length. I would convert to 30 fps, then edit the result to eliminate long unchanging sections (nights, etc).

Good luck.