Dynamic real-time playback

• US 7,669,130 B2
• Filed: 04/15/2005
• Issued: 02/23/2010
• Est. Priority Date: 04/15/2005
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Agarwal, Sachin, Agnoli, Giovanni, Meaney, Brian Everett
• Primary Examiner(s): Huynh; Ba
• Assistant Examiner(s): Salomon; Phenuel S
• Application Number:
  US11/107,397
• Publication Number:
  US 20060236245A1
• Time in Patent Office: 1,775 Days
• Field of Search: 715/716, 715/723, 715/721, 715/726, 386/113, 386/114, 386/21, 386/52
• US Class Current: 715/723
• CPC Class Codes: G11B 27/02 Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take 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

Abstract

Systems and methods for previewing edited video. In general, in one implementation, a method includes generating a video sequence from a plurality of video segments, identifying an inability to output at least one video segment in the video sequence in substantially real time; and adjusting an output level associated with the at least one video segment to enable the at least one video segment to be output in substantially real time. The output level may include a video quality or a frame rate.

Claims

1. A method comprising:

generating a video sequence from a plurality of video segments, wherein the plurality of video segments are arranged sequentially in the video sequence;

identifying an inability to output at least one video segment in the video sequence in substantially real time;

displaying a first indicator in a graphical display of the video segments in the video sequence, the first indicator graphically indicating video segments that are able to be output in substantially real time at a full output level;

displaying a second indicator in the graphical display of the video segments in the video sequence, the second indicator graphically indicating video segments that are able to be output in substantially real time at a reduced output level;

displaying a third indicator in the graphical display of the video segments in the video sequence, the third indicator graphically indicating the inability to output the at least one video segment in substantially real time; and

adjusting an output level associated with the at least one video segment to enable the at least one video segment to be output in substantially real time.

2. The method of claim 1, further comprising:

preserving an output level associated with video segments in the video sequence that are able to be output in substantially real time.

3. The method of claim 1, further comprising:

selecting a video quality;

identifying an inability to output a particular video segment in substantially real time at the selected video quality; and

adjusting a level of video quality associated with the particular video segment, the adjustment being to a highest available level that allows output of the particular video segment in substantially real time.

4. The method of claim 1, further comprising:

selecting a frame rate;

identifying an inability to output a particular video segment in substantially real time at the selected frame rate; and

adjusting a level of frame rate associated with the particular video segment, the adjustment being to a highest available level that allows output of the particular video segment in substantially real time.

5. The method of claim 1, wherein the output level includes at least one level selected from the group consisting of a video quality and a frame rate.

6. The method of claim 1, further including:

calculating a cost associated with outputting each of the video segments in real time, the cost being in terms of system resources,

wherein identifying the inability to output is based on the cost.

7. The method of claim 1, further including:

identifying video playback capabilities associated with system resources that are operable to output the video sequence,

wherein identifying the inability to output is based on a cost associated with outputting at least one of the video segments.

8. The method of claim 7, wherein the system resources include one or more resources selected from a group consisting of a processor, a memory, a graphics processor, a cache, and a bus.

9. The method of claim 1, wherein generating the video sequence includes:

editing a subset of the plurality of video segments to add an effect.

10. The method of claim 1, further including:

after adjusting the output level, outputting the video sequence in substantially real time.

11. The method of claim 1, further including:

rendering the output video responsive to the inability to output the at least one video segment in substantially real time.

12. The method of claim 1, wherein output in substantially real time refers to output having consistency in the output level.

13. The method of claim 1, wherein output in substantially real time is within a predetermined level of accuracy of strict real time.

21. The method of claim 1, further comprising:

dynamically allocating a buffer size associated with outputting a portion of the video sequence in accordance with a frame resolution of the video segment corresponding to the portion of the video sequence.

14. A method, comprising:

generating a video sequence from a plurality of video segments;

selecting an output level;

identifying an inability to output at least one video segment in the video sequence in substantially real time;

generating, prior to playback, a graphical display including a timeline representing an arrangement of the plurality of video segments and including a plurality of indicators, wherein each indicator corresponds to a video segment of the plurality of video segments;

displaying a first indicator in the graphical display of the video segments in the video sequence, the first indicator graphically indicating video segments that are able to be output in substantially real time at a full output level;

displaying a second indicator in the graphical display of the video segments in the video sequence, the second indicator graphically indicating video segments that are able to be output in substantially real time at a reduced output level; and

displaying a third indicator in the graphical display of the video segments in the video sequence, the third indicator graphically indicating an inability to output one or more of the video segments in substantially real time.

15. A computer program product, tangibly stored on a computer-readable medium, the product including instructions operable to cause a computer system to perform operations comprising:

generating a video sequence from a plurality of video segments, wherein the plurality of video segments are arranged sequentially in the video sequence;

identifying an inability to output at least one video segment in the video sequence in substantially real time;

displaying a first indicator in a graphical display of the video segments in the video sequence, the first indicator graphically indicating video segments that are able to be output in substantially real time at a full output level;

displaying a second indicator in the graphical display of the video segments in the video sequence, the second indicator graphically indicating video segments that are able to be output in substantially real time at a reduced output level;

displaying a third indicator in the graphical display of the video segments in the video sequence, the third indicator graphically indicating the inability to output the at least one video segment in substantially real time; and

adjusting an output level associated with the at least one video segment to enable the at least one video segment to be output in substantially real time.

16. The computer program product of claim 15, further including instructions operable to cause a computer system to perform operations comprising:

preserving an output level associated with video segments in the video sequence that are able to be output in substantially real time.

17. The computer program product of claim 15, wherein the output level includes at least one level selected from the group consisting of a video quality and a frame rate.

18. The computer program product of claim 15, further including instructions operable to cause a computer system to perform operations comprising:

identifying video playback capabilities associated with system resources that are operable to output the video sequence,

wherein identifying the inability to output is based on a cost associated with outputting at least one of the video segments.

19. The computer program product of claim 18, wherein the system resources include one or more resources selected from a group consisting of a processor, a memory, a graphics processor, a cache, and a bus.

20. The computer program product of claim 15, further including instructions operable to cause a computer system to perform operations comprising:

dynamically allocating a buffer size associated with outputting a portion of the video sequence in accordance with a frame resolution of the video segment corresponding to the portion of the video sequence.

22. A system, comprising:

a computer-readable medium storing a plurality of video segments;

an editing timeline configurable to generate a video sequence from the plurality of video segments, wherein the plurality of video segments are arranged sequentially in the video sequence, the editing timeline displaying a first indicator in a graphical display of the video segments in the video sequence, the first indicator graphically indicating video segments that are able to be output in substantially real time at a full output level, a second indicator in the graphical display of the video segments in the video sequence, the second indicator graphically indicating video segments that are able to be output in substantially real time at a reduced output level, and a third indicator in the graphical display of the video segments in the video sequence, the third indicator graphically indicating an inability to output corresponding video segments in substantially real time;

a cost block configured to determine a cost associated with outputting one or more of the plurality of video segments in real time, wherein the cost block correlates one or more video editing operations corresponding to the video sequence with an associated cost; and

a preview block, in communication with the editing timeline, the preview block configurable to identify an inability to output at least one video segment in the video sequence in substantially real time, the preview block adjusting an output level associated with the at least one video segment to enable the at least one video segment to be output in substantially real time;

wherein the output level is adjusted as a function of the cost associated with outputting the at least one video segment in real time.

23. The system of claim 22, further including:

a real time engine, in communication with the editing timeline and the preview block, the real time engine configured to output the video sequence in substantially real time including dynamically allocating buffer sizes associated with outputting the video sequence in accordance with a frame resolution of each video segment in the video sequence.

24. The system of claim 22, wherein the output level includes at least one level selected from the group consisting of a video quality and a frame rate.

25. The system of claim 22, wherein the preview block includes:

a cost block to calculate the cost associated with outputting each of the video segments in real time, the cost being in terms of system resources,

wherein the preview block identifies the inability to output is based on the cost.

26. The system of claim 22, wherein the preview block includes:

a resource block to identify video playback capabilities associated with system resources that are operable to output the video sequence,

wherein the preview block identifies the inability to output is based on the cost.

27. The system of claim 26, wherein the system resources include one or more resources selected from a group consisting of a processor, a memory, a graphics processor, a cache, and a bus.

28. The system of claim 22, further including:

a rendering engine, in communication with the preview block, the rendering engine configured to render the output video sequence responsive to the inability of the preview block to output the at least one video segment in substantially real time.

29. The system of claim 22, wherein output in substantially real time refers to output having consistency in the output level.

30. The system of claim 22, wherein output in substantially real time is within a predetermined level of accuracy of strict real time.