REFERENCE CLIPS IN A MEDIA-EDITING APPLICATION

• US 20130124999A1
• Filed: 01/30/2012
• Published: 05/16/2013
• Est. Priority Date: 11/14/2011
• Status: Abandoned Application

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Agnoli, Giovanni, Poole, Shaun M., Carson, Kenneth M., Pendergast, Colleen, Meaney, Brian
• Application Number:
  US13/361,932
• Publication Number:
  US 20130124999A1
• Time in Patent Office: Days
• US Class Current: 715/723
• CPC Class Codes: G11B 27/031 Electronic editing of digitised analogue information signals, e.g. audio or video signals
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/10 Indexing; Addressing; Timing or synchronising; Measuring tape travel
• CPC Class Codes: G11B 27/28 by using information signals recorded by the same method as the main recording G11B27/22 takes precedence
• CPC Class Codes: G11B 27/34 Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D
• CPC Class Codes: H04N 21/21805 enabling multiple viewpoints, e.g. using a plurality of cameras
• CPC Class Codes: H04N 21/2743 Video hosting of uploaded data from client
• CPC Class Codes: H04N 21/47205 for manipulating displayed content, e.g. interacting with MPEG-4 objects, editing locally
• CPC Class Codes: H04N 21/8549 Creating video summaries, e.g. movie trailer retrieval in video databases by using presentations in form of a video summary G06F16/739
• CPC Class Codes: H04N 5/262 Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
• CPC Class Codes: H04N 7/17336 Handling of requests in head-ends

Abstract

Some embodiments provide a media-editing application. The application defines a reference clip data structure for a media clip that represents one or more media files imported into the media-editing application. The application receives a command to add the media clip into a composite media presentation. The application defines a clip instance data structure as part of the composite media presentation. The clip instance data structure inherits properties of the reference clip data structure and subsequent modifications to the reference clip data structure affect the clip instance data structure.

Claims

1. A computer readable medium storing a media-editing application for execution by at least one processing unit, the media-editing application comprising sets of instructions for:

defining a reference clip data structure for a media clip that represents one or more media files imported into the media-editing application;

receiving a command to add the media clip into a composite media presentation; and

defining a clip instance data structure as part of the composite media presentation, wherein the clip instance data structure inherits properties of the reference clip data structure and subsequent modifications to the reference clip data structure affect the clip instance data structure.

2. The computer readable medium of claim 1, wherein the reference clip data structure comprises a plurality of clip structures that each comprises an ordered sequence of media clips.

3. The computer readable medium of claim 2, wherein the clip instance data structure comprises a variable identifying one of the ordered sequences of media clips in the reference clip data structure.

4. The computer readable medium of claim 3, wherein the media-editing application further comprises a set of instructions for rendering the composite media presentation by using the identified ordered sequence of media clips.

5. The computer readable medium of claim 2, wherein each of the plurality of clip structures in the reference clip data structure is anchored to a gap clip in the reference clip data structure.

6. The computer readable medium of claim 5, wherein the gap clip has a duration of a longest of the plurality of ordered sequences.

7. The computer readable medium of claim 1, wherein subsequent modifications to the clip instance data structure do not affect the reference clip data structure.

8. A computer readable medium storing a media-editing application for execution by at least one processing unit, the media-editing application comprising sets of instructions for:

receiving a request to generate a particular image corresponding to a particular time in a media clip of a composite media presentation;

retrieving a source image corresponding to the particular time in the media clip;

applying, to the source image, a first set of effects specified by a reference clip to which the media clip refers; and

after applying the first set of effects, applying a second set of effects specified by the media clip to the source image.

9. The computer readable medium of claim 8, wherein the particular image is for playback in a display area of the media-editing application.

10. The computer readable medium of claim 8, wherein the first set of effects are stored on a particular media clip contained in the reference clip.

11. The computer readable medium of claim 8, wherein the first set of effects comprises a spatial conform effect but not a rate conform effect.

12. The computer readable medium of claim 8, wherein the second set of effects comprises a spatial conform effect and a rate conform effect.

13. The computer readable medium of claim 8, wherein the second set of effects are stored on the media clip for application to a particular group of media clips contained in the reference clip.

14. A method for defining a data structure for a multi-camera media clip created from a plurality of different media clips, the method comprising:

defining a gap clip having a variable duration, the gap clip contained by the multi-camera media clip;

defining a plurality of ordered sequences anchored to the gap clip, each of the ordered sequences comprising one or more clips ordered based on timing data of the clips.

15. The method of claim 14, wherein the ordered sequences comprise additional gap clips for spacing out the clips in the sequences.

16. The method of claim 15, wherein the additional gap clips have durations defined based on the timing data of the clips.

17. The method of claim 14, wherein the duration of the gap clip is based on the ordered sequence with the longest duration.

18. The method of claim 14, wherein each of the ordered sequences is defined as a media clip that comprises an array of media clips.

19. A computer readable medium storing a media-editing application for execution by at least one processing unit, the media-editing application comprising sets of instructions for:

receiving a request to generate an image for a particular time in a composite presentation that is occupied by a multi-camera media clip instance, wherein the multi-camera media clip instance comprises (i) a reference to a multi-camera media clip reference and (ii) a variable indicating a particular ordered sequence within the multi-camera media clip reference, the particular time in the composite presentation corresponding to a particular time within the particular ordered sequence;

defining a render graph for the multi-camera media clip instance, the set of instructions for defining the render graph comprising sets of instructions for;

defining a node for each effect stored on a particular media clip in the ordered sequence that corresponds to the particular time in the ordered sequence; and

defining a node for each effect stored in a particular effect stack on the multi-camera media clip instance, the particular effect stack corresponding to the particular ordered sequence; and

executing the render graph on a source image in order to generate the requested image.

20. The computer readable medium of claim 19, wherein the media-editing application further comprises sets of instructions for retrieving and decoding the source image.

21. The computer readable medium of claim 20, wherein the particular media clip refers to an asset data structure, the asset data structure indicating a location of the source image.

22. The computer readable medium of claim 19, wherein the set of instructions for defining the render graph further comprises a set of instructions for combining a first node and a second node into a single node in the render graph before executing the render graph.

23. The computer readable medium of claim 22, wherein the first node is a user-defined transform effect and the second node is an automatically-defined spatial conform effect.