burakoff@gmail.com

After reading numerous threads on optimizing Quicktime, I'm still getting skips, which kind of ruins the mood for live performance. I'm wondering if any of you seasoned professionals think that referencing video from an external HD would smooth playback... I have a MBP.

After reading numerous threads on optimizing Quicktime, I'm still getting skips, which kind of ruins the mood for live performance. I'm wondering if any of you seasoned professionals think that referencing video from an external HD would smooth playback... I have a MBP.
Just wondering,
Mike


skip-free-playback-with-firewire-hd

do you get the skips with my optimized patches?

does QT play the movie fine with 'play all frames' enabled off of your 

what format is the QT movie in, bitrate/codec etc?

On Mar 25, 2008, at 1:35 PM, burakoff wrote:

> After reading numerous threads on optimizing Quicktime, I'm still 

> getting skips, which kind of ruins the mood for live performance. 

> I'm wondering if any of you seasoned professionals think that 

> referencing video from an external HD would smooth playback... I 

what are you doing in your patch?
do you get the skips with my optimized patches?
does QT play the movie fine with 'play all frames' enabled off of your  
HD?
what format is the QT movie in, bitrate/codec etc?

>
> After reading numerous threads on optimizing Quicktime, I'm still  
> getting skips, which kind of ruins the mood for live performance.  
> I'm wondering if any of you seasoned professionals think that  
> referencing video from an external HD would smooth playback... I  
> have a MBP.
> Just wondering,
> Mike


I am using a patch that syncs up video to Ableton Live. There is a lot of Gl processing, but as far as quicktime goes, It's fairly simple, just a variable rate player. Everything is Motion Jpeg, best quality 30fps. After applying the techniques in your patches, the skipping is happening a lot less, still every 30 seconds or so, there will be a glitch. I guess I was just wondering if there was any advantage to loading video off of a separate HD than the operating system/Jitter.

Thanks for the reply Vade,
I am using a patch that syncs up video to Ableton Live. There is a lot of Gl processing, but as far as quicktime goes, It's fairly simple, just a variable rate player. Everything is Motion Jpeg, best quality 30fps. After applying the techniques in your patches, the skipping is happening a lot less, still every 30 seconds or so, there will be a glitch. I guess I was just wondering if there was any advantage to loading video off of a separate HD than the operating system/Jitter.


"I am using a patch that syncs up video to Ableton Live."

- realize that Jitter processing is not miltithreaded so if jitter has 

to 'wait' for the QT movie, then this will 'block' openGL (as far as I 

am aware, this is true). So if you have a stall ANYWHERE, be it 

openGL, matrix processing or QT decoding, it will stall everywhere.

"Everything is Motion Jpeg, best quality"

- might be your issue. Best quality introduces a LOT of bandwidth over 

head due to file size bloat while not being THAT MUCH nicer looking 

that a lower quality./bitrate setting, like 70-80%. Try re-encoding at 

70-80% as a last shot - and tell me if you can *really* see a visual 

"I guess I was just wondering if there was any advantage to loading 

video off of a separate HD than the operating system/Jitter."

- yes there will be - you wont have to deal with competing resources 

On Mar 28, 2008, at 5:30 PM, burakoff wrote:

> I am using a patch that syncs up video to Ableton Live. There is a 

> lot of Gl processing, but as far as quicktime goes, It's fairly 

> simple, just a variable rate player. Everything is Motion Jpeg, best 

> quality 30fps. After applying the techniques in your patches, the 

> skipping is happening a lot less, still every 30 seconds or so, 

> there will be a glitch. I guess I was just wondering if there was 

> any advantage to loading video off of a separate HD than the 

"I am using a patch that syncs up video to Ableton Live."
- ok, what does sync mean here?

"There is a lot of Gl processing,"
- realize that Jitter processing is not miltithreaded so if jitter has  
to 'wait' for the QT movie, then this will 'block' openGL (as far as I  
am aware, this is true). So if you have a stall ANYWHERE, be it  
openGL, matrix processing or QT decoding, it will stall everywhere.

"Everything is Motion Jpeg, best quality"
- might be your issue. Best quality introduces a LOT of bandwidth over  
head due to file size bloat while not being THAT MUCH nicer looking  
that a lower quality./bitrate setting, like 70-80%. Try re-encoding at  
70-80% as a last shot - and tell me if you can *really* see a visual  
difference in your files.

"I guess I was just wondering if there was any advantage to loading  
video off of a separate HD than the operating system/Jitter."
- yes there will be - you wont have to deal with competing resources  
from the OS/host applications.

>
> Thanks for the reply Vade,
> I am using a patch that syncs up video to Ableton Live. There is a  
> lot of Gl processing, but as far as quicktime goes, It's fairly  
> simple, just a variable rate player. Everything is Motion Jpeg, best  
> quality 30fps. After applying the techniques in your patches, the  
> skipping is happening a lot less, still every 30 seconds or so,  
> there will be a glitch. I guess I was just wondering if there was  
> any advantage to loading video off of a separate HD than the  
> operating system/Jitter.


Skip free playback with firewire HD?