US 8,527,646 B2Granted

Rendering in a multi-user video editing system

AssigneeAvid Technology Canada Corp.

InventorsMaher Khatib, Min Wei

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Abstract

Methods and systems for remotely editing a video file involve: receiving, at a server, a video editing command from a remote client; modifying, at the server, a virtual representation of a media file in accordance with the received command, the virtual representation including a reference to a source media file stored on a storage device, the storage device being connected to the server over a high-speed link; and generating and transmitting, from the server to the remote client, a proxy representation of the source media file modified by the editing commands, wherein the various regions of the proxy representation are rendered either in the background or in real-time according to their complexity. Rendered frames, whether generated in the background or in real time, are stored for reuse. Individual frames of the edited video file may be transmitted upon request from a client. Simultaneous editing of independent projects by multiple users connected to the server via multiple thin clients is supported.

Claims22

Dependent claims

A system for remote video editing, the system comprising:

a storage device for storing a source media file;
an input for receiving, over a network, video editing commands pertaining to the source media file;
a virtual representation of edited media, the virtual representation comprising the editing commands and a link to the source media file;
a complexity evaluator that determines a complexity for rendering a proxy representation of a region of the virtual representation of the edited media, wherein rendering involves applying the received video editing commands for the region to the source media file;
a render scheduler that dispatches the region for rendering to a background rendering engine if the complexity for rendering the proxy representation of the region exceeds a predetermined threshold, wherein the background rendering engine renders the region by applying the received editing commands to a portion of the source media file corresponding to the region and stores the rendered region in a render cache;
and
a media delivery engine that delivers the rendered proxy representation of the edited media, wherein for each region of the virtual representation of the edited media, if a rendering of the region is present in the render cache, the media delivery engine retrieves the rendering of the region from the render cache and transmits the rendering of the region over the network, and if a rendering of the region is not present in the render cache, the media delivery engine retrieves a portion of the source media file corresponding to the region, renders the region in real-time using a real-time rendering engine by applying the received video editing commands to the retrieved portion of the source media file, and transmits the rendering of the region over the network.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/754,843Filed 6 Apr 2010 · us provisional application
Priority: 14 Apr 2009
Published: US 2010/0262710 A114 Oct 2010
Granted: 3 Sep 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G06F 3/048
Input arrangements or combined input and output arrangements for interaction between user and computer: interaction techniques based on graphical…
G06F 16/40
Information retrieval; Database structures therefor; File system structures therefor: of multimedia data, e.g. slideshows comprising image and…
G11B 27/034
Electronic editing of digitised analogue information signals, e.g. audio or video signals: on discs
G06F
Computing and data processing