Hello Nisar, Unfortunately I don't have a solution for your issue, but some information which may help you to understand the problem.
I tried to export your composition to DV and on playback time I get some hops of the text. Anyways stepping through the movie frame by frame, there is no hop at all, so this lets me think it is a playback issue of QT, but not a rendering issue in QC. If you playback 25 fps on a computer with 60 fps video frame rate you certainly have some frames that doesn't have the same playback duration as others. That may cause such hops as well (multiplied by our brain which is disturbed by the "wrong prediction" it did for the linear movement of the text). When QuartComposer renders the composition live, it is linked to the video refresh rate of the output device. Thats why the rendering in QC is so stable. best, Achim Breidenbach Boinx Software On 25.12.2010, at 09:58, Nisar Ahmed wrote: > Thank you for your valuable input. > > What i actually want is to export the frames to an SDI card like decklink or > AJA Kona, but the results of exporting through SDI are similar to an exported > pal-dv movie. > > The expected result is a smooth animation without flickering which should be > possible with 25fps but there are software available that can render > animations in realtime to SDI cards without any flickering. I have been using > vizrt (www.vizrt.com) in my company which is based on windows(directx) and > use bluefish444 LT cards to send output without any flickering at all speeds. > > I have tried using quicktime's ICM and decklink SDK but the results are the > same. > > I hope this the information you need to understand the issue but if there is > anything else you would like to know please do let me know > > I will have a look at quartz crystal and will get back to you with the > results. > > thanks > > Nisar > Subject: Re: exporting a composition to a quicktime movie > From: dokt...@mac.com > Date: Fri, 24 Dec 2010 16:18:01 -0500 > CC: quartzcomposer-dev@lists.apple.com > To: nisar...@hotmail.com > > It might be helpful to describe why the movie is poor. What is the expected > result, what do you actually see, etc. > > If the issue is flickering text, then yes, Quartz Composer renders at 60fps, > DV @ 25 will make the title crawl look choppy since there are less frames to > show the text crawl between two positions. Doing smooth titles is not easy at > high speed, low framerate, there are some tricks you can do, but the best > thing is to adjust the speed of the scrolling until it looks good. > > Maybe look into Quartz Crystal from Kineme and use frame blending which will > help ease the "pops" in position between consecutive frames. > > Is that the issue you are noticing? > > > > On Dec 24, 2010, at 7:41 AM, Nisar Ahmed wrote: > > I am trying to export a quartz composition movie to a quicktime movie using > quicktime pro but the result is poor as compared to the original composition > file. > > I am attaching the composition you can try opening it with quicktime pro and > exporting it to dv-pal movie 25fps and see the result. I have also tried > other combinations but failed to reproduce the expected result. > > Thanks in advance > Nisar > <crawler.qtz> _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list (Quartzcomposer-dev@lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/quartzcomposer-dev/doktorp%40mac.com > > This email sent to dokt...@mac.com > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list (Quartzcomposer-dev@lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/quartzcomposer-dev/achim%40boinx.com > > This email sent to ac...@boinx.com
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