So when would the Sandy Bridge 23.976

[BTRY B 529th FA BN]

So when would the Sandy Bridge 23.976 fps be a problem?

I am considering unloading this 920 platform (MB & CPU) and selling off the GPU and getting something that uses a little less power.. i'm idling around 95w and i'd like something as strong as this 920 for video encoding (moderate use & 1080p) that idles lower.. could a lower wattage PSU do the trick instead? I seen a 20w drop when i hooked up a Seasonic X 400w Gold to my old Q9650 rig (from a Seasonic X 650)

 

[Zap]

So when would the Sandy Bridge 23.976 fps be a problem?

It is a problem if you notice it.

For efficiency, just go to Sandy Bridge before you sell off the graphics card. Then, you can test it back/forth to see if you notice.

 

[mfenn]

Yeah, it's one repeated frame every 30 seconds or so (if my math works out). Some people will notice this and it will drive them crazy. Most will be completely oblivious and happy.

 

[DesiPower]

Yeah, it's one repeated frame every 30 seconds or so (if my math works out). Some people will notice this and it will drive them crazy. Most will be completely oblivious and happy.

I thought it was every 4 minutes or so...

*Edit*
nvm, its every 42 or 45 seconds. There are several discussion in avsforum related to this, IIRC, the gist was, its unnoticeable and Intel has no plans of fixing it anytime soon, Ivy Bridge will still have the same issue.

 

[Zap]

There are several discussion there in avsforum related to this, IIRC, the gist was, its unnoticeable

I'm probably in the "oblivious and happy" group. :awe:

 

[mfenn]

I'm probably in the "oblivious and happy" group. :awe:

Me too! :awe:

 

[BTRY B 529th FA BN]

I have a TV tuner card..

 

[mfenn]

I have a TV tuner card..

Ok?

 

[VirtualLarry]

Intel has no plans of fixing it anytime soon, Ivy Bridge will still have the same issue.

Isn't that what they said at first, about the Pentium FPU bug?

 

[mfenn]

Isn't that what they said at first, about the Pentium FPU bug?

Yep, typical corporate doublespeak. They don't want to admit that a poor design will be improved because that would hurt their current sales.

 

[BTRY B 529th FA BN]

I'm trying to figure out what situations this would be a problem in.

I occasionally transcode or encode 1080p in Windows Live Movie Maker
I haven't re-installed my TV Tuner card in a while but don't want it to be a problem trying to watch NBA games or ... Cable TV.
I'd like to not use a discrete GPU

EDIT: i'm sorry, i'm really tired and haven't put my thoughts together on this..

will continue this later, thanks
...

 

[Zap]

They don't want to admit that a poor design will be improved because that would hurt their current sales.

No, it is "planned obsolescence."

For instance what makes a piece of hardware not work with a new OS? I have sitting here a Logitech Quickcam of some kind (VC-2 or something that looks like a golf ball) that does not work with Windows Vista/7 because Logitech won't make drivers for it. Of course people found workarounds (mostly for Vista, 7 is still iffy) but no easy software download from Logitech. Why not? Of course if we kept using the old web cam, there would be no reason to buy a new one.

Apple is a company that is good at this game. They like to not put all their eggs in one basket, and roll out incremental upgrades that require new hardware every year for their iDevices.

Can Intel add SSD caching to older motherboards? Sure! But it is a ''feature" of Z68 so they won't.

 

[mfenn]

I'm trying to figure out what situations this would be a problem in.

I occasionally transcode or encode 1080p in Windows Live Movie Maker
I haven't re-installed my TV Tuner card in a while but don't want it to be a problem trying to watch NBA games or ... Cable TV.
I'd like to not use a discrete GPU

EDIT: i'm sorry, i'm really tired and haven't put my thoughts together on this..

will continue this later, thanks
...

It's only a problem when you're trying to play back 23.967 FPS content. I believe that most (all?) OTA or cable content is 30 FPS (after deinterlacing if necessary).

 

[Accord99]

So when would the Sandy Bridge 23.976 fps be a problem?

You play a lot of movie and other film sources and output to a 120Hz or 240Hz screen with interpolation disabled and have a good eye.

 

[50]

It's only a problem when you're trying to play back 23.967 FPS content. I believe that most (all?) OTA or cable content is 30 FPS (after deinterlacing if necessary).

To be 100% accurate, NTSC broadcasts are 29.97 fps (http://en.wikipedia.org/wiki/NTSC). Depending on the standard and encoding, ATSC (http://en.wikipedia.org/wiki/ATSC) can do 23.976, 24fps, 29.97, 30 etc. Correct me if I'm wrong but I believe in the US, ATSC is all 29.97 fps @ 1080i and 59.94 fps @ 720p.

Source:
http://en.wikipedia.org/wiki/Telecine

 

[meatana]

You play a lot of movie and other film sources and output to a 120Hz or 240Hz screen with interpolation disabled and have a good eye.

The lost or repeated video frame causes a major glitch when frame interpolation is turn ON. I was blaming the frame interpolation algorithm before I found out about the Intel 24P hardware bug then realize it was the cause.

People don't realize what's worse than the occasional video glitch is that every time you get a video glitch you also get a 42ms lip-sync slip as well!!!! To me this is MUCH more annoying than an occasional video glitch.

The audio video relation is slowly slipping until a frame is dropped or repeated at which time is snaps 42ms.

 

[DominionSeraph]

People don't realize what's worse than the occasional video glitch is that every time you get a video glitch you also get a 42ms lip-sync slip as well!!!! To me this is MUCH more annoying than an occasional video glitch.

The audio video relation is slowly slipping until a frame is dropped or repeated at which time is snaps 42ms.

Ah yes, I know I always hate going to the movies because being 10 meters away from the speakers introduces that nasty 34ms delay due to the speed of sound. Total audio/video dysync!

 

[mfenn]

Ah yes, I know I always hate going to the movies because being 10 meters away from the speakers introduces that nasty 34ms delay due to the speed of sound. Total audio/video dysync!

I know right! They always sync it for the people in the front row and it just kills me when I sit in the back.

 

[meatana]

Hmm, Didn't realize that don't go to them, but it makes sence..if 34ms bothers you how about more than 42ms.. bothers the heck out of me.

Anyway with this CPU hardware bug, it's impossible to ever set the AV lip sync properly. It's always sliding around by 42ms. If you try to set it with all sandy bridge CPUs in 4minutes it will be off by + or - 42ms!

FYI,

ATSC Implementation Subcommittee IS-191 has found that under all operational situations, the sound program should never lead the video program by more than 15ms and should never lag the video program by more than 45ms ±15ms.