-
real-time speed changes
anyone know a card which will allow speed changes to be real time (no rendering) and displayed on a CRT monitor, that way i can get this media100 of my set and out of my life
-
3 Replies
-
All speed changes, with the exception of 200% and 50%, will need to be rendered. No card will remedy this.
-
bummer, i used to be able to do speed changes without rendering with premiere and a canopus card on the PC, and was hoping for an FCP equivalent, looks like i’m stuck with the media100 for a bit longer
-
I just checked this with a piece of PAL DV inside FCP 4.5. The variable speed plays back in real time, even outside the range 50%-200% (at one time it used to be real-time just within these limits).
So, it looks like you can do real time variable speed changes.
The manual for FCP 4.5 says on page III-156 says “All constant speed changes between 1 and 200% can be played in real time, even with frame blending turned on.” “Unlike a constant speed change, there is no limit to the speed range of variable speed clips that can play in real time.”
Page III-157: “… you can turn on frame blending in the Speed dialog. … Note: While clips using frame blendingcan play back in real time at preview quality, frame blending on a field by field basis are much more processor intensive, and is only performed when the clip is either rendered or played via a third-party capture card with real-time hardware processing that’s capable of field rendering.(Sorry, but one factor affecting my test might be me running a later version of system software and QuickTime than you are using.)
Bottom line is that speed changes can and do play back in real time. Whether this is adequate for your needs is unknown – see if you can get a sample of your media and try it out on a friend’s FCP or at an Apple reseller who has FCP available for demo. There is no one best way of interpolating frames in variable speed playback – Apple supplies a tool, but you might find that other third party tools provide a better end result. A friend found the Apple-supplied tool inadequate and bought another tool off the Internet that he thought gave better results.
Bill Lee
Reply to this Discussion! Login or Sign Up