Systems and methods for generation of composite video
Systems and methods for generating a composite video based on a plurality of input streams are provided. A first video stream is received from a first device. A second video stream and coordination information are received from a second device. The coordination information includes instructions for combining the first video stream and the second video stream in a composite video. The first video stream and the second video stream are time aligned, and the instructions of the coordination information and the time-aligned first video stream and second video stream are used to generate the composite video.
1. A computer-implemented method of generating a composite video based on a plurality of input video streams, comprising:
receiving, at a compositing engine, a first video stream from a first device;
receiving, at the compositing engine, a second video stream from a second device;
receiving, at the compositing engine, coordination information from a coordinating device distinct from the compositing engine, wherein the coordination information is generated at the coordinating device based on the coordinating device receiving the first video stream and the second video stream, and further wherein the coordination information includes instructions for combining, at the compositing engine, the first video stream and the second video stream in a composite video;
time aligning the first video stream and the second video stream; and
using, at the compositing engine, the instructions of the coordination information and the time-aligned first video stream and second video stream to generate the composite video.
2. The method of claim 1 , wherein the second video stream or the coordination information is generated after or during a playback of at least a portion of the received first video stream.
3. The method of claim 2 , wherein a user views the playback and generates the second video stream or the coordination information.
4. The method of claim 1 , further comprising:
transmitting the first video stream to the second device.
5. The method of claim 1 , wherein time aligning a particular video stream includes:
determining a clock skew between a time measurement associated with the particular video stream and a master time measurement; and
aligning the particular video stream with a master timeline based on the clock skew.
6. The method of claim 1 , wherein time aligning the first video stream and the second video stream includes:
determining a clock skew between a time measurement associated with the first video stream and a time measurement associated with the second video stream; and
aligning the first video stream with the second video stream based on the clock skew.
7. The method of claim 1 , wherein the first device or second device is a cellular phone, smartphone, videophone, digital camera, video camera, desktop computer, laptop computer, tablet computer, video game console, or server.
8. The method of claim 1 , wherein the first video stream or the second video stream is video data, audio data represented as a video stream, a still image represented as a video stream, a screen capture represented as a video stream, an annotation event stream, a virtual ink event stream, a slide presentation, a virtual whiteboard event stream, or text represented as a video stream.
9. The method of claim 1 , wherein the composite video is configured to display the first video stream and the second video stream in sub-regions of a composite video display, and wherein a size and a position of the sub-regions are determined based on the instructions in the coordination information.
10. The method of claim 1 , wherein the instructions of the coordination information are configured to overlay the first video stream on the second video stream in the composite video, or to overlay the second video stream on the first video stream in the composite video.
11. The method of claim 1 , wherein the first video stream or the second video stream is paused, stopped, rewound, fast-forwarded, opened, closed, slowed down, or sped up in the composite video based on the instructions in the coordination information.
12. The method of claim 1 , wherein time aligning the first video stream and the second video stream is based on the instructions of the coordination information.
13. The method of claim 1 , wherein the second video stream does not include portions of the first video stream.
14. The method of claim 1 , wherein the coordination information is generated on the coordinating device using a software program.
15. The method of claim 14 , wherein a user of the software program generates the coordination information by combining the first video stream and the second video stream on a virtual presentation canvas.
16. The method of claim 1 , wherein the compositing engine is hosted by a remote server distinct from the first device and the second device.
17. The method of claim 1 , wherein second device comprises the coordinating device.
18. The method of claim 1 , wherein the coordinating device is used only for generating the coordination information and does not generate a video stream.
19. A computer-implemented method of generating a composite video based on a plurality of input video streams, comprising:
receiving, at a compositing engine, a first video stream from a first device;
receiving, at the compositing engine, a second video stream from a second device, wherein the second video stream is generated based on a display, at the second device, of the first video stream;
receiving, at the compositing engine, a second video stream from a second device, wherein the second video stream is generated based on a display at the second device of the first video stream;
receiving, at the compositing engine, a coordination information from a coordinating device distinct from the compositing engine, wherein the coordination information is generated at the coordinating device based on the coordinating device receiving the first video stream and the second video stream, and wherein the coordination information includes instructions for combining, at the compositing engine, the first video stream and the second video stream in a composite video; and
combining, at the compositing engine, the first video stream and the second video stream in the composite video based on the coordination information.
20. The method of claim 19 , wherein a user views the playback and generates the second video stream or the coordination information.
21. The method of claim 19 , wherein the first video stream or the second video stream is video data, audio data represented as a video stream, a still image represented as a video stream, a screen capture represented as a video stream, an annotation event stream, a virtual ink event stream, a slide presentation, a virtual whiteboard event stream, or text represented as a video stream.
22. The method of claim 19 , wherein the composite video is configured to display the first video stream and the second video stream in sub-regions of a composite video display, and wherein a size and a position of the sub-regions are determined based on the instructions in the coordination information.
23. The method of claim 19 , wherein the instructions of the coordination information are configured to overlay the first video stream on the second video stream in the composite video, or to overlay the second video stream on the first video stream in the composite video.
24. The method of claim 19 , wherein the first video stream or the second video stream is paused, stopped, rewound, fast-forwarded, opened, closed, slowed down, or sped up in the composite video based on the instructions in the coordination information.
25. The method of claim 19 , wherein the instructions of the coordination information are configured to time align the first video stream and the second video stream in the composite video.
26. The method of claim 19 , wherein the second video stream does not include portions of the first video stream.
27. The method of claim 19 , wherein the coordination information is generated using a software program.
28. The method of claim 27 , wherein the software program generates the coordination information by combining the first video stream and the second video stream on a virtual presentation canvas.
29. The method of claim 19 , wherein the compositing engine is hosted by a remote server distinct from the first device and the second device.
30. The method of claim 19 , wherein the second device comprises the coordinating device.
31. The method of claim 19 , wherein the coordinating device is used only for generating the coordination information and does not generate a video stream.