Why don´t this play smooth?????

[samsc]

Brand new system from Highend. Mac Pro 2.66 with SCSI drive etc....

QuickTime clips about a minute or two long, 1024 x 576, Photo JPEG 75% or 50%, with 48 khz audio.

And in the middle of several clips, the frame rate stutters. And we are talking one clip playing on one layer...

Why?

there is a lot of difference between photjpeg 75 and 50 and whenever you do anything that isnt standard def - the whole game changes. things are much more critical.

if you dont have any history with doing anything with digital video you will be in for a sharp learning experience- you will need to learn what works and what doesnt for whatever your system is.

most things do not work. you have to find something that works for what you need to do.
there are only a few things that do. its not the other way round.

what did you use photojpeg 75 or 50?

and are you trying to play audio at the same time?

[ping141]

I have 10 years video expericene from high end post production to 360 x 288 VDMX vj´ing, so digital video and codecs are not new to me.

It seems that in the middle of certain clips that are a minute or two long, the frame rate will stutter a bit and then play smooth again. The clips that I have noticed this with were originally in 75% Photo JPEG with 48khz stereo audio. Then I lowered them to 50% in order see if it helped and it didn´t. It´s not a major thing, this show is up and running every night, and I´m probably the only person noticing this problem, but still. On a 2.66 Mac Pro with a SCSI drive and an x1900 card, anything should in reality play fine, at least one stream on these resolutions. They play flawlessly on my laptop in QTP from the internal drive btw. It might be something funny with my clips, but I can´t see what it could be.

And in order to track what plays well and what doen not it would be great to have a FPS history in the Catalyst where you could see and track when the frame rate dips. Also, the FPS indicator in the Layers window does not work when playing with audio.

[samsc]

when you play with audio - playback is handled totally by quicktime.
so whatever happens with what you see if something quicktime is doing.
and audio takes priority.

quicktime player doesnt have to handle lots of layers and lots of fx...so it doesnt have so much to do. nor does it have to handle interfaces to lots of equipment like video input simulaneously.
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what size and frequency are all your display screens set to?
what is your screen setup?

do you see this when you dont have audio?


can you send me your pdf profile