We're using photo-jpeg codec (medium quality, without sound, 720x576, 

25fps) movie files and it's depressingly stuttering. Our machines (OSX) 

are monster workstations and i wonder where's the problem. When we play 

our files using quicktime, it's perfect. In jitter, it's not acceptable. 

Which is the best codec we have to use to get a smooth, high quality 

ps: latest jitter, video editing macintosh workstations, something 

called "blackmagic video output" to go to the video projectors

f.e chanfrault | aka | personal computer music

>>>>>>> |sublime music for a desperate people|

We're using photo-jpeg codec (medium quality, without sound, 720x576, 
25fps) movie files and it's depressingly stuttering. Our machines (OSX) 
are monster workstations and i wonder where's the problem. When we play 
our files using quicktime, it's perfect. In jitter, it's not acceptable. 
Why ?

Which is the best codec we have to use to get a smooth, high quality 
screening ?

ps: latest jitter, video editing macintosh workstations, something 
called "blackmagic video output" to go to the video projectors

-- 
f.e chanfrault | aka | personal computer music
 >>>>>>> http://www.personal-computer-music.com
 >>>>>>> |sublime music for a desperate people|


which-codec-for-screening

are you displaying your video in openGL ?

did you try Vade's optimization patches ?

i had issues with heavy files ( above 1gb no matter dimensions/lentgh ), now i try to stay under 1Gb, even on powerfull machines .

i also separate the actual video process from the control , i now do applications for the video displaying engine and keep a patch for the controls , using udp to communicate between two.

"loadram" can help but jitter has a 2gb limit :(

if you plan to just broadcast direct to window can bethe solution for playing heavy files , try this patch if it is of any help :

Quote: f.e wrote on Thu, 28 February 2008 11:21

----------------------------------------------------

> We're using photo-jpeg codec (medium quality, without sound, 720x576, 

> 25fps) movie files and it's depressingly stuttering. Our machines (OSX) 

> are monster workstations and i wonder where's the problem. When we play 

> our files using quicktime, it's perfect. In jitter, it's not acceptable. 

> Which is the best codec we have to use to get a smooth, high quality 

> ps: latest jitter, video editing macintosh workstations, something 

> called "blackmagic video output" to go to the video projectors

> f.e chanfrault | aka | personal computer music

> >>>>>>> |sublime music for a desperate people|

are you displaying your video in openGL ?
did you try Vade's optimization patches ?

i had issues with heavy files ( above 1gb no matter dimensions/lentgh ), now i try to stay under 1Gb, even on powerfull machines .
i also separate the actual video process from the control , i now do applications  for the video displaying engine and keep a patch for the controls , using udp to communicate between two.

Quote: f.e wrote on Thu, 28 February 2008 11:21
----------------------------------------------------
> Hello,
>
> We're using photo-jpeg codec (medium quality, without sound, 720x576, 
> 25fps) movie files and it's depressingly stuttering. Our machines (OSX) 
> are monster workstations and i wonder where's the problem. When we play 
> our files using quicktime, it's perfect. In jitter, it's not acceptable. 
> Why ?
>
> Which is the best codec we have to use to get a smooth, high quality 
> screening ?
>
> f.e
>
>
> ps: latest jitter, video editing macintosh workstations, something 
> called "blackmagic video output" to go to the video projectors
>
> -- 
> f.e chanfrault | aka | personal computer music
>  >>>>>>> http://www.personal-computer-music.com
>  >>>>>>> |sublime music for a desperate people|
>
----------------------------------------------------


On Feb 28, 2008, at 3:42 PM, karl-otto von oertzen wrote:

> "loadram" can help but jitter has a 2gb limit :(

That's not actually true - while jitter does have a 2GB limit for 

jit.matrix objects, the jit.qt.movie object CAN load files larger 

than 2GB. We've done some that are over 4GB, but it eats up a lot of 

real RAM (much more than the movie file size itself, by a factor of 

On Feb 28, 2008, at 3:42 PM, karl-otto von oertzen wrote:
>
> "loadram" can help but jitter has a 2gb limit :(
>

That's not actually true - while jitter does have a 2GB limit for  
jit.matrix objects, the jit.qt.movie object CAN load files larger  
than 2GB. We've done some that are over 4GB, but it eats up a lot of  
real RAM (much more than the movie file size itself, by a factor of  
about 4X)

Which codec for screening ?