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Sightseer
Posts: 1
Accepted Solution

GO Pro hero 5 slow motion effect, editing and playback

Hello,

 

I have a few 120 FPS videos that I shot on my go pro 5, but when I copy them over to my PC and try to play, they just play on normal speed.  After I upload them on google photos though, I can see they play as shot ( on 120 FPS). I tried to edit them on movie maker or iMovie for a small project, but the videos are just playing with normal speed, do I actually need to slow down the speed to actually see the effect? I was under the impression that the 120 FPS itself should do the slow motion effect.

 

Thanks


Accepted Solutions
Explorer
Posts: 11,707

Re: GO Pro hero 5 slow motion effect, editing and playback

Since you posted in the mobile app section of the community, you're getting responses related to the Quik app (which by the way is pretty awesome and will allow you to slow your footage).

To answer your questions though, I'll try to explain video and what slow motion means.

Regular, or normal playback is generally considered to be 24fps (Cinema), 30fps (TV) and 30-60fps (video). Recording in higher fps, like 120fps does not automatically result in slow motion. In most cases, you need to slow the video down to one of the above fps: Super slow motion (24fps 20% playback speed), Standard Slow motion (30fps 40% playback speed), and half slow motion (60fps 50% playback speed). The reason why 240fps is so awesome is because it allows for super super slow motion! 24fps plays back at 10% of normal speed. If course you need to be careful with this as 10 seconds of 240fps = 2,400 frames. If you slow this down to 24fps the same video will now take 100 seconds to play from start to finish.

Now, some video players can only play in 30fps so they automatically slow the video because of their limitations. Also, some cameras automatically convert high frame rate video to 30fps. Both of these ways of handling high frame rates are undesirable as the severely limit your video playback, especially when it comes to speed ramping (being able to slow and speed up the video in a fluid manner). Cameras that do the conversion automatically also remove the audio, which is also not good.

There are better video editors than what you are using, but they will take some time to get used to. The Quik Mobile app is actually a pretty powerful editor that does allow for video creation without music and with the ability to cut, trim, and apply slow motion, speed up, and play at normal speed. Doing so requires some practice and exploring with the app, but if you put in the time, it's worth it (be sure to go into the Quik settings to choose the highest export quality).

If you prefer desktop editing, DaVinci Resolve is by far the best editor. It's a true professional editor, and it's free! You'll probably need to watch some YouTube videos to get the hang of it, but there are plenty and it's worth the time. Other editors to try are VideoProc, ShotCut, HitFilm Express, and VSDC.

Here are a few videos I found in slow motion in iMovie

https://youtu.be/-DxjZjR9G5k

https://youtu.be/S4YZoyDxQFk

https://youtu.be/WBI-Xy2wqew

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All Replies
GoPro
Posts: 454

Re: GO Pro hero 5 slow motion effect, editing and playback

@sumitcha You should try putting them in Quik App then, you will see that they will definitely play in slow-motion :) 

Here some info about slow mo in Quik App > https://gopro.com/help/articles/question_answer/How-Does-Quik-for-mobile-Manage-Slow-Motion

Explorer
Posts: 11,707

Re: GO Pro hero 5 slow motion effect, editing and playback

Since you posted in the mobile app section of the community, you're getting responses related to the Quik app (which by the way is pretty awesome and will allow you to slow your footage).

To answer your questions though, I'll try to explain video and what slow motion means.

Regular, or normal playback is generally considered to be 24fps (Cinema), 30fps (TV) and 30-60fps (video). Recording in higher fps, like 120fps does not automatically result in slow motion. In most cases, you need to slow the video down to one of the above fps: Super slow motion (24fps 20% playback speed), Standard Slow motion (30fps 40% playback speed), and half slow motion (60fps 50% playback speed). The reason why 240fps is so awesome is because it allows for super super slow motion! 24fps plays back at 10% of normal speed. If course you need to be careful with this as 10 seconds of 240fps = 2,400 frames. If you slow this down to 24fps the same video will now take 100 seconds to play from start to finish.

Now, some video players can only play in 30fps so they automatically slow the video because of their limitations. Also, some cameras automatically convert high frame rate video to 30fps. Both of these ways of handling high frame rates are undesirable as the severely limit your video playback, especially when it comes to speed ramping (being able to slow and speed up the video in a fluid manner). Cameras that do the conversion automatically also remove the audio, which is also not good.

There are better video editors than what you are using, but they will take some time to get used to. The Quik Mobile app is actually a pretty powerful editor that does allow for video creation without music and with the ability to cut, trim, and apply slow motion, speed up, and play at normal speed. Doing so requires some practice and exploring with the app, but if you put in the time, it's worth it (be sure to go into the Quik settings to choose the highest export quality).

If you prefer desktop editing, DaVinci Resolve is by far the best editor. It's a true professional editor, and it's free! You'll probably need to watch some YouTube videos to get the hang of it, but there are plenty and it's worth the time. Other editors to try are VideoProc, ShotCut, HitFilm Express, and VSDC.

Here are a few videos I found in slow motion in iMovie

https://youtu.be/-DxjZjR9G5k

https://youtu.be/S4YZoyDxQFk

https://youtu.be/WBI-Xy2wqew

GoPro
Posts: 454

Re: GO Pro hero 5 slow motion effect, editing and playback

Woa thanks @danielr15 you're better at this than me ahahha :)
My message was pretty just: try it with Quik Mobile App :)))