The Camera will allow you to set a Framerate and will allready slow it down bevore Saving. I dont remember, what the Default Framerate is on this Setting, but i got mine Set to 25fps. The camera doesnt Save Video Files with 1000fps, in fact, depending on what exact Encoder Setting its using internally, that wouldnt even be possible, if someone would try to do that. Even the h.264 Compression has its Limits, and 1kfps is far beyond that. 60fps for the Save Framerate is the Maximum i can set on my 2.1.
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All Frames Captured at whatever fps you set it at, will be saved as a much longer playing Video File, if you save it compressed as h.264 Video (= a .mp4 File...), or just as Single Files for Every frame like images without any Time Information (unless you set it to also Save Timestamps on the Images). For Single-Frame File Formats, you will need to give your Video Editing software the Information about Framerate by hand.
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Video-Files directly from the Camera are usually huge in Filesize, and thus are normally compressed (+edited) and uploaded by users, or, if they want to share High Quality unedited Footage, usually DNG or Tiff-Sample Frames Are Uploaded, as allready single Frames have Considerable Filesize. If you want some Unedited Footage i can shoot some and just save a Very short video, so its small enough to be uploaded here. Let me know, if that would help.