Hi Rick, why not using QuickTime to process QC?
You can open any movie with QuickTime Player (assuming the old one!) and simply drag a QC file in the movie window. this gives you a QC-Track within this movie and QT will play it back. Also Exporting should be no problem. Anyways : I tested it, and it shows that its very difficult to get the QC placed correctly within a movie file. If you simply drag & drop the QC file into the movie it gets "inserted" into the track, where the current movie play head is located. So the original movie get split here and no overlay will happen. But here is how I assembled the attached sample movie: - Open the movie with QT-Player (make sure play head is at start of movie) - drag the QC file into the movie - command-C to copy the currently selected track duration to the clip board. - command-x to delete the selection - choose "Add to movie" menu form the Edit menu. This adds the copied tracks to the movie at the play head. - open the "Movie Properties" window - delete the extra "video track 2" (maybe also a second sound track) - select the new QC Track - switch to "Visual Settings" Panel - select "Transparency: Straight alpha" Now the QC is playing back over the original movie totally in sync. One problem I couldn't figure out is how to set the duration of the QC track. Currently it is fixed 30 seconds. (maybe one has to open the movie file with "dumpster" and manipulate the track information manually? (Sorry, I removed the attachment, because it was to big to be send to the mailinglist, 256k limit) Best, Achim Breidenbach Bonix Software On 27.05.2010, at 07:52, Rick Mann wrote: > I've been looking a little more into this project I have in mind. Generally > speaking, I want to take an input movie, process it (generally by adding > overlays to the video, but possibly any other processing QC can do), and > write it to a new movie file. I want to pass audio through unaltered. > > It seems more and more evident that I'm going to have to write my own app to > host the composition. I imagine a simple app that allows me to choose a > composition, an input movie, and specify an output movie filename. It would > then process the input movie as described above. > > Can someone tell me, in high-level terms, how I would do this? A QCRenderer > seems obviously necessary. I saw a sample app that exports TIFF files for > each frame, perhaps I can start with that and create an H.264 movie (would I > use CoreVideo for that?). I suppose the best thing is to synchronously > process the input movie, controlling the time base, but I'm not sure how to > do that; the end result I want is to process each frame of the input movie > separately. > > I also suppose my little host app will have to separately extract the audio > of the input movie file and add it to the output movie file. > > Any suggestions on how to proceed would be much appreciated. If there's some > obvious and simple way to do this that I'm unaware of, please let me know. > > Thanks! > > -- > Rick > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/quartzcomposer-dev/achim%40boinx.com > > This email sent to [email protected]
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