DJDream
lvl.3
Israel
Offline
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No, no, it is not I mean and please let me explain:
If you shot with two Osmo Pocket devices the exact same shot, with the same lenght, one at 4K@30fps and one at 4K@60fps you'll see that the both files have aproximatelly the same size and if you'll check the each file info you'll find that the both have the same bitrate info, something like that :
For 4K@60fps:
Video: MPEG4 Video (H264) 3840x2160 59.94fps 99932kbps [V: DJI.AVC [eng] (h264 high L5.2, yuv420p, 3840x2160, 99932 kb/s)]
Audio: AAC 48000Hz stereo 189kbps [A: DJI.AAC [eng] (aac lc, 48000 Hz, stereo, 189 kb/s)]
For 4K@30fps:
Video: MPEG4 Video (H264) 3840x2160 29.97fps 100031kbps [V: DJI.AVC [eng] (h264 high L5.2, yuv420p, 3840x2160, 100031 kb/s)]
Audio: AAC 48000Hz stereo 189kbps [A: DJI.AAC [eng] (aac lc, 48000 Hz, stereo, 189 kb/s)]
So how a file which has 2 times more frames on it, and it should have two times more bitrate and size, has in fact the same size and the same bitrate as a video with halsf of the frames?
To me the 4K@60fps video looks, from this reason, a "frame-upscaled" version of 4K@30fps and not a NATIVE 4K@60fps.
This is probably the reason that we cannot have a "SUPERFINE" option for 4K@60fps but only at 4K@30fps because it will be over the CPU/GPU capacity to upsacale the 30fps file to 60fps at 101Mbit/sec bitrate. But for "FINE" mode, they are probably "frame-overscale" the 30fps information to 60fps information without adding in fact any new information for twice the amount of the frames. Fact- the size of the file on the both 30fps and 60fps at 4K resolution is the same...
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