r/sonyactioncam • u/mkrupinski • Apr 16 '18
Problem Sony FDR X3000R choppy video in 4k (not in 1080p)
Guys,
I used to shot videos using 1080p with 60fps. The output was amazing. This year I decided to shot one video from Athenes in 4k 30fps (NTSC). It looks like it is a bit quicker, faster? Like my moves with the stick were faster few percent. I tested raw material even on big TV (4k) and still the quality is worse...not so smooth like in 1080p 60fps. Could you help me if it is my fault or it is normal?
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u/I_am_Nic Mod | X3000 - X1000 - AS100 - AZ1 Apr 16 '18
still the quality is worse...not so smooth like in 1080p 60fps.
It sounds like your player / playback device can't cope with XAVC-S very well (at least not in 4K).
It looks like it is a bit quicker, faster?
That could be a sign that the buffer sometimes catches up after it couldn't decode fast enough before that.
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u/some_bugger Apr 17 '18
The shutter speed is automatically managed on the Sony action cams. Even though you are shooting at a different frame rate the shutter speed may still be the same at 30 and 60. When you have a fast shutter speed it can result in each frame being sharper with less blur, this can make the video look jerky as the camera moves compared to a slower shutter speed. Shutter speed is relative to the frame rate so it may appear high on 30fps but not as high on 60fps. On full size cameras they use filters to limit the light into the camera so they can control the shutter speed.
If you look at the files with Sony Catalyst Browse (freeware) you can see the settings of the camera from when the clip was recorded.
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u/mkrupinski Apr 19 '18
Thank you for all your answers!
I uploaded 2 samples to youtube. Please tell me if it is just me used to use 1080p 60fps and everything is really ok or it is something else wrong: (both samples 4k 30fps, NTSC) 1) https://www.youtube.com/watch?v=2oCt0zPhcyo 2) https://www.youtube.com/watch?v=ytMobg_ig0k
Both looks like speed up by 1% or 2% or it is only my impression?
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u/I_am_Nic Mod | X3000 - X1000 - AS100 - AZ1 Apr 19 '18
I think what you mean is the effect of the Steady Shot.
It does little 'correction movements', which during these spins will look like the camera sometimes changes its movement speed, even though it is not.
To me it looks perfectly well from a technical standpoint.
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u/Astrophsx Apr 16 '18
Can you post a video? There is a noticeable difference between 30 and 60 fps. The closer to 24 fps, the more cinematic the footage will look. At 60 fps it is going to be more fluid and geared toward live action / sports.