COMPLICATED QUESTIONs ; Source vs Export Settings - GoPro Forum, Classifieds and Support
 
LinkBack Thread Tools Search this Thread
post #1 of 8 Old 02-15-2016, 02:39 PM Thread Starter
Junior Member
 
Join Date: Feb 2016
Posts: 4
(Thread Starter)
COMPLICATED QUESTIONs ; Source vs Export Settings

This is probably a pretty advanced question and i'm not sure if there is even an easy answer. Just wondering if i can save myself a ton of time testing it out myself. Please only answer if you are 100% confirmed on your answer

Camera : Hero 4 Silver
Source : 1080p 60fps

Scenario 1 .
My source is 1080p 60fps . For conversion i keep the fps at the source 60fps , and keep the quality at high

Question 1 .
During editing if i slow down some parts to %50 obviously i would be seeing 30fps video .... but if i export the video at 1080p 30fps what happens to the video ??
Does the entire video render to 30fps and then the slomo parts are 15fps and not smooth ? Does the video render to 30fps during processing and then somehow the slowmo parts are also at 30fps ?


Scenario 2;
I record video in 2.7k 30fps . During the conversion i choose 60fps , High quality ...and during the Export i choose 60fps
Question 2;
Would i somehow result in a more fluid video than my original 30fps? since i converted to 60fps would i be able to use slowmotion during editing (since the converted video is now 60fps) without having lag between frames? (even though my source was only 30fps)
coachjacksonk is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 02-15-2016, 03:14 PM
Super Moderator
 
KreamCheaz's Avatar
 
Join Date: Dec 2015
Location: Bay Area, CA
Posts: 776
Hi Coach,
I found this discussion at another forum that might be of interest to you regarding frame rates and upconverting and downconverting.
https://encodingtalk.com/threads/smo...-youtube.2923/

I hope this helps.

Cheers,

Cheers,
KreamCheaz

Free Download
To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
- Connect your GoPro to your MAC using the GoPro WiFi and download all your media.
KreamCheaz is offline  
post #3 of 8 Old 02-15-2016, 03:47 PM
Administrator
 
Dr. Z's Avatar
 
Join Date: Dec 2012
Location: Fayetteville, Arkansas
Posts: 1,838
Ok, I can see that you already know a lot about what you want. Take a look at Mic Bergsma's Youtube on the subject. It addresses some of what you are asking. I've also included a conversion chart for slow below.



I hope this helps.

50fps → 25fps = 0.5
60fps → 30fps = 0.5
50fps → 24fps = 0.48
60fps → 24fps = 0.4
100fps → 25fps = 0.25
120fps → 30fps = 0.25
200fps → 25fps = 0.125*
240fps → 30fps = 0.125*

Column 1 - Raw video
Column 2 - New Video
Column 3 - Playback video

Cheers,
Charlie



To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.

Last edited by Dr. Z; 02-15-2016 at 03:56 PM.
Dr. Z is offline  
post #4 of 8 Old 02-15-2016, 04:27 PM
Contributing Member
 
p fandango's Avatar
 
Join Date: Apr 2013
Posts: 1,834
25fps is high for a slo-mo, i realise the higher you can keep it the smoother. I went down to 12fps for my ice bucket challenge & don't think its jittery at all (recorded in WVGA tho so poor quality)


Last edited by p fandango; 02-15-2016 at 04:30 PM.
p fandango is online now  
post #5 of 8 Old 02-15-2016, 09:12 PM Thread Starter
Junior Member
 
Join Date: Feb 2016
Posts: 4
(Thread Starter)
Thanks Kareem Danish

Thanks. That helped me confirm that i should basically just keep the editing in the same frame rate as the source since removing and adding frames can create some stutter. I was hoping that i could record in 60p just for smoothness and then render to 30fps just to have smaller file size but i'll just stay with native source settings all teh way through. I'm still going to do some of my own testing and post to youtube and i'll provide links here just so those that are curious can see what each case does. For all of us that have the Silver if we could find a way to record in 2.7k and then make it 60fps so that we can successfully do some slow motion that would be amazing.
coachjacksonk is offline  
post #6 of 8 Old 02-15-2016, 09:14 PM Thread Starter
Junior Member
 
Join Date: Feb 2016
Posts: 4
(Thread Starter)
Quote:
Originally Posted by p fandango View Post
25fps is high for a slo-mo, i realise the higher you can keep it the smoother. I went down to 12fps for my ice bucket challenge & don't think its jittery at all (recorded in WVGA tho so poor quality)


Thanks. But i was actually wondering about what either up rendering or down rendering to FPS would do to the smoothness of videos. I'm already really aware of what your abilities are with slowmotion and flux. I just want to know what they are when altering Source FPS. As i said i'll create a vid with tests and post links here.
coachjacksonk is offline  
post #7 of 8 Old 02-15-2016, 09:23 PM Thread Starter
Junior Member
 
Join Date: Feb 2016
Posts: 4
(Thread Starter)
Quote:
Originally Posted by drzcharlie View Post
Ok, I can see that you already know a lot about what you want. Take a look at Mic Bergsma's Youtube on the subject. It addresses some of what you are asking. I've also included a conversion chart for slow below.



I hope this helps.

50fps → 25fps = 0.5
60fps → 30fps = 0.5
50fps → 24fps = 0.48
60fps → 24fps = 0.4
100fps → 25fps = 0.25
120fps → 30fps = 0.25
200fps → 25fps = 0.125*
240fps → 30fps = 0.125*

Column 1 - Raw video
Column 2 - New Video
Column 3 - Playback video
Thanks Drzcharlie. But like i said to the other fellow with the video i already know about slowmotion percentages and flux. My question is about how smooth a video will be after altering the native source FPS and if they would be smooth enough for slow motion after altering the FPS during conversion or exporting. The link Kareem provided basically showed that it hurts the smoothness by removing or creating frames but i'm still going to do my own tests and posts a link to the video results here so that people will ultimately know. If i can successfully convert a 2.7k 30fps video into a smooth 60fps with motion interpolated frame rate conversion and then have a 2.7k product that is smooth enough to play with speeds i will be happy.
coachjacksonk is offline  
post #8 of 8 Old 02-15-2016, 11:45 PM
Administrator
 
Dr. Z's Avatar
 
Join Date: Dec 2012
Location: Fayetteville, Arkansas
Posts: 1,838
Try the settings in the chart that I gave you. As you said, take test footage and experiment. What is the final determination for your video? Will it be a personal video or will it be posted as a business video or will it be uploaded to Youtube or other social media? Or, just to satisfy curiosity?

If you are using GPS it will be more finicky to get the settings you want to behave the way you want. If you are using Premiere Pro, Final Cut or similar, just place the 60fps clips in a 30/40fps time line and then render/produce/finalize the video at under 30fps. This should let you run at 1000 percent thus producing smooth video. However, if you run slower it will stutter in the 30fps parts of the video.

One thing to keep in mind is lower fps footage has less aliasing than higher fps so quality will suffer. Slowing the footage down by 75% will make the video smooth. The formula for figuring this out is: timeline fps (divided by) source fps When you shoot 60FPS (60 frames per second) and distribute those 60 frames on a 30 frame per second timeline then you get 2 seconds of video.

Example: on a 30 fps timeline you have room for 30 frames (images) which create 1 second of output. During you video shoot with 60 fps you created 60 frames that captured that 1 second of action. You can distribute those 60 full images on the 30 fps timeline and you get 2 seconds of action, in other words the original action was certainly only 1 second long and playing it over 2 seconds means you get beautiful slo-mo.

Let’s assume you have a 30 fps timeline. You have 30 fps, 48 fps, 60 fps, and 120 fps footage in your project.

30 fps is where your source equals your target speed. You can slow it down but not much in order to not loose too much quality. Drop any higher fps source on the timeline. Let’s assume you drop a 2 seconds long 60 fps clip on the timeline. It will, not show also as a 2 second long clip.

Am I muddling this up? Or is it of any help?

Cheers,
Charlie



To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
Dr. Z is offline  
Reply

Tags
convert, export, fps, quality, source

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the GoPro Forum, Classifieds and Support forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



User Tag List

Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search



Similar Threads
Thread Thread Starter Forum Replies Last Post
Alternate battery source Sammiew GoPro General Discussions 9 11-29-2015 05:11 PM
Click Export and NOTHING!!! neilwillz GOPRO STUDIO 15 10-20-2015 06:52 PM
Battery Life and Energy source order robertfeliciano GoPro Hero 3 3 09-06-2013 04:10 PM
How do you Export ALL frames? DeanWesterburg GoPro Hero 3 0 12-30-2012 11:20 PM
Using GoPro as Live Streaming Source? GambitDash GoPro Hero and Hero 2 1 06-04-2012 08:32 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome