How to play a 120fps video? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 10 Old 02-27-2011, 07:47 PM - Thread Starter
AVS Addicted Member
 
DaveFi's Avatar
 
Join Date: Nov 2002
Location: Natick MA
Posts: 17,177
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 26
What refresh rate should I play a 120fps (119.88fps) video back? 24Hz? 60Hz? Little confused by this.

XBOX Live: Wagmman
PSN: Wagg
BFBC2: Wagman
Steam: Wag

My Second Life character looks and acts exactly like me except he can fly.
DaveFi is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 02-27-2011, 11:16 PM
AVS Special Member
 
cavu's Avatar
 
Join Date: Apr 2005
Location: CANADA
Posts: 6,887
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 13
There is no such thing as a 120fps video in consumer AV.

"The greatest obstacle to discovery is not ignorance  it is the illusion of knowledge." - Daniel Boorstin
"Our lives begin to end the day we become silent about things that matter.
" - MLK

cavu is offline  
post #3 of 10 Old 02-28-2011, 07:25 AM - Thread Starter
AVS Addicted Member
 
DaveFi's Avatar
 
Join Date: Nov 2002
Location: Natick MA
Posts: 17,177
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 26
That might be true but I happen to have some 1080p files that are 120fps.

XBOX Live: Wagmman
PSN: Wagg
BFBC2: Wagman
Steam: Wag

My Second Life character looks and acts exactly like me except he can fly.
DaveFi is offline  
post #4 of 10 Old 02-28-2011, 08:51 AM
Senior Member
 
nathanjbrown's Avatar
 
Join Date: Feb 2004
Posts: 255
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Hi DaveFi,

I may be mistaken, but I don't believe any televisions currently on the market are capable of accepting a 120Hz signal. All those 120Hz and 240Hz LCDs out there can only generate the 120Hz image via interpolation using a 24, 30 or 60Hz input signal.

This is the type of technological advancement I'd like to see in the world of televisions and video sources in the coming few years; higher resolutions and faster frame rates. 4K at 120fps sounds good to me!

Now...Plug a nice video card into an old high-end CRT monitor with the refresh rate jacked up to 120Hz, and you may be able to view the source file as it's meant to be seen!

Nathan
nathanjbrown is offline  
post #5 of 10 Old 02-28-2011, 09:18 AM
Advanced Member
 
Calcvictim's Avatar
 
Join Date: Nov 2007
Posts: 859
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 10
Quote:
Originally Posted by nathanjbrown View Post

Hi DaveFi,

I may be mistaken, but I don't believe any televisions currently on the market are capable of accepting a 120Hz signal. All those 120Hz and 240Hz LCDs out there can only generate the 120Hz image via interpolation using a 24, 30 or 60Hz input signal.


Nathan

Isn't that why he is asking whether to play it at 24hz or 60hz.


OP: I am no expert but I do not think you can play the files, if you play it at anything less then 120hz then the speed will actually be slower.
Calcvictim is offline  
post #6 of 10 Old 02-28-2011, 09:24 AM
AVS Special Member
 
cavu's Avatar
 
Join Date: Apr 2005
Location: CANADA
Posts: 6,887
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 13
Quote:
Originally Posted by Calcvictim View Post

Isn't that why he is asking whether to play it at 24hz or 60hz.

The point is that the input circuitry of his display very likely does not have the bandwidth nor the timing circuitry to decode a 120fps video stream.
Quote:
if you play it at anything less then 120hz then the speed will actually be slower.

Not so. If the display could actually capture the incoming 120fps video stream, it would display every other frame at 60Hz or every fifth frame at 24Hz. It would be like a "strobe stop-motion" effect.

"The greatest obstacle to discovery is not ignorance  it is the illusion of knowledge." - Daniel Boorstin
"Our lives begin to end the day we become silent about things that matter.
" - MLK

cavu is offline  
post #7 of 10 Old 02-28-2011, 09:44 AM
Advanced Member
 
Calcvictim's Avatar
 
Join Date: Nov 2007
Posts: 859
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 10
Quote:
Originally Posted by cavu View Post

The point is that the input circuitry of his display very likely does not have the bandwidth nor the timing circuitry to decode a 120fps video stream.

that is what I said
Quote:
Originally Posted by cavu View Post

Not so. If the display could actually capture the incoming 120fps video stream, it would display every other frame at 60Hz or every fifth frame at 24Hz. It would be like a "strobe stop-motion" effect.

if the display could "capture" the 120hz stream then it would most likely display at 120 frames also
Calcvictim is offline  
post #8 of 10 Old 02-28-2011, 10:18 AM
AVS Addicted Member
 
walford's Avatar
 
Join Date: May 2003
Location: Orange County, CA
Posts: 16,789
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 12
Dave,
What is the souce of your 1080o 120fps video? Are you sure you don't have a source of 1080p/60 frame sequentiall video?
There some smaller screen 120Hz LCD Monitors designed for gamers that will accept 120Hz video over a dual link DVI interface but they do not have 1080p resolution.
walford is offline  
post #9 of 10 Old 02-28-2011, 06:27 PM - Thread Starter
AVS Addicted Member
 
DaveFi's Avatar
 
Join Date: Nov 2002
Location: Natick MA
Posts: 17,177
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 26
Don't ask me why, but according to the file info they are Divx5 encoded 120fps files. They are 2d, not 3d as someone else mentioned and MPC-HC seems to play them back OK (but VLC cannot). According to FFDShow video info it says it is approx 24fps-25fps. So I guess I have my answer. 24Hz is appropriate.

XBOX Live: Wagmman
PSN: Wagg
BFBC2: Wagman
Steam: Wag

My Second Life character looks and acts exactly like me except he can fly.
DaveFi is offline  
post #10 of 10 Old 03-01-2011, 05:30 AM
Advanced Member
 
Calcvictim's Avatar
 
Join Date: Nov 2007
Posts: 859
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 10
Quote:
Originally Posted by DaveFi View Post

Don't ask me why, but according to the file info they are Divx5 encoded 120fps files. They are 2d, not 3d as someone else mentioned and MPC-HC seems to play them back OK (but VLC cannot). According to FFDShow video info it says it is approx 24fps-25fps. So I guess I have my answer. 24Hz is appropriate.

so when youplay the file in mpc-hc, it plays fine and the framerate is showing between 24 and 25.....if that's so I do not really understand what makes this file designated as 120fps?

I would think if you play it 4-5 time slower then it was made/shot at then it would look like it's playing that much slower?
Calcvictim is offline  
Reply Home Theater Computers

User Tag List

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


Forum Jump: 

Posting Rules  
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off