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Tourist
Posts: 3
Accepted Solution

Videos playing at faster speed than normal

Today I filmed some videos while skiing and it turned out that when I reproduce them on any player (VLC, Quicktime, Quik, GoPro Studio, ...) the video seems to play faster than normal speed. I recorded the video with a resolution of 1080 and 50 fps. Do you have any ideas why this happened? I have used the camera many times before and I never had this issue.

 

Thanks in advance for your help.


Accepted Solutions
Explorer
Posts: 11,174

Re: Videos playing at faster speed than normal

[ Edited ]

It's really hard to tell from that short clip. Was the skier in the background going much slower in real life? Or, are you talking about the look when you are walking?

Since you are filming in bright light in the snow it's possible the shutter speed (not fps) is compensating and at 1/200 or higher. This can create an image that appears stuttered at times. This is a common phenomenon with DSL and other cameras. Because of the higher shutter there is a lack of natural motion blur that the human eye normally sees.

Does it last longer than what you posted?

View solution in original post


All Replies
Explorer
Posts: 11,174

Re: Videos playing at faster speed than normal

I've never seen this happen.  It seems as if the video player is reading the file as being in a higher FPS than what is was actually filmed in.  Did you have auto low light on?  This is pure speculation, but perhaps the file data is being read as your setting of 50fps but actually recorded at 25fps.

 

Can you upload the file to youtube or vimeo and then post it here for other users to see?

Tourist
Posts: 3

Re: Videos playing at faster speed than normal

Here you can see it: https://vid.me/MLhv

Explorer
Posts: 11,174

Re: Videos playing at faster speed than normal

[ Edited ]

It's really hard to tell from that short clip. Was the skier in the background going much slower in real life? Or, are you talking about the look when you are walking?

Since you are filming in bright light in the snow it's possible the shutter speed (not fps) is compensating and at 1/200 or higher. This can create an image that appears stuttered at times. This is a common phenomenon with DSL and other cameras. Because of the higher shutter there is a lack of natural motion blur that the human eye normally sees.

Does it last longer than what you posted?

Highlighted
Tourist
Posts: 3

Re: Videos playing at faster speed than normal

Hi Daniel, thanks for your answer.

 

Yes, both the skier and me were not as fast. I just cut a short clip to make it lighter, but I will try to find a better clip and I will paste it. I was walking with skiing shoes, so it's quite hard to go that fast :) and you can also see that the movement of the camera is really fast compared to the swinging of normal pace walking.

 

I did some tests and it seems like slowing down the video to around 85% makes it look like normal speed, but it's hard to tell actually. The sound is also slightly distorted when I do that.