PROVIDING PARTIAL FILE STREAM FOR GENERATING THUMBNAIL

• US 20130036233A1
• Filed: 08/03/2011
• Published: 02/07/2013
• Est. Priority Date: 08/03/2011
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Orleth, Robert
• Granted Patent: US 9,204,175 B2
• Time in Patent Office: Days
• US Class Current: 709/231
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04N 21/234363 by altering the spatial resolution, e.g. for clients with a lower screen resolution
• CPC Class Codes: H04N 21/2743 Video hosting of uploaded data from client
• CPC Class Codes: H04N 21/84 Generation or processing of descriptive data, e.g. content descriptors systems specially adapted for using meta-information in broadcast systems H04H60/73
• 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

Abstract

A partial file stream is utilized to conserve resources and provide services when a file stream such as video file stream is requested for processing to generate a thumbnail. A file stream host provides a partial file stream generated from the beginning and end parts of the video file stream adjoined by a middle part. The partial file stream minimizes resource utilization. The partial file stream also enables access by external processes to generate the thumbnail and minimize exposure to security risks by stopping direct access to the file stream host.

Claims

1. A method at least partially executed on a computing device for providing a partial file stream for generating a thumbnail, the method comprising:

receiving a request for a file stream to generate a thumbnail;

determining a beginning part of the file stream and an end part of the file stream;

generating the partial file stream with substantially similar attributes as the file stream, the partial file stream including the beginning part of the file stream, an empty middle part, and the end part of the file stream; and

transmitting the partial file stream to a sandbox for processing.

2. The method of claim 1, wherein the file stream is a video file stream.

3. The method of claim 2, further comprising:

determining the beginning part of the file stream based on a first predefined data amount from a beginning of the file stream; and

determining the end part based on a second predefined data amount from an end of the file stream.

4. The method of claim 3, wherein the first and second predefined data amounts are determined based on at least one from a set of:

a video source, a resolution of the video file stream, and a bit rate of the video file stream.

5. The method of claim 2, wherein the end part of the video file stream includes metadata associated with the video file stream.

6. The method of claim 5, wherein the metadata includes at least one from a set of a length of the video file stream and a frame rate of with the video file stream.

7. The method of claim 1, further comprising:

generating the partial file stream by inserting an indication of no data in the empty middle part.

8. The method of claim 7, wherein the indication of no data includes zeros in place of data.

9. The method of claim 7, wherein the indication of no data includes a sparse file feature of the file system.

10. The method of claim 1, wherein the partial file stream is provided by a distributed application storing the file stream across multiple servers.

11. A computing device for providing a partial file stream for generating a thumbnail, the computing device comprising:

a memory;

a processor coupled to the memory, the processor executing a file stream provider application, wherein the application is configured to;

receive a request for a video file stream to generate a thumbnail;

determine a beginning part of the video file stream and an end part of the video file stream;

generate the partial file stream with substantially similar attributes as the video file stream, by preserving the beginning part of the video file stream, inserting zeros in place of data in an empty middle part, and preserving the end part of the video file stream; and

transmit the partial file stream to a sandbox for processing.

12. The computing device of claim 11, wherein the beginning and end parts of the partial file stream are determined based on a percentage of the entire video file stream.

13. The computing device of claim 12, wherein the percentage is determined based on at least one from a set of:

a video source, a resolution of the video file stream, and a bit rate of the video file stream.

14. The computing device of claim 11, wherein the file stream provider application is configured to increase security for the computing device by limiting exposure to external processes and malware through the use of the partial file stream from the sandbox.

15. The computing device of claim 11, wherein the computing device is a file stream server that is part of a hosted service.

16. The computing device of claim 15, wherein the file stream server is configured to store and transmit the thumbnail and metadata for the video file stream to requesting users.

17. A computer-readable memory device with instructions stored thereon for providing a partial file stream for generating a thumbnail, the instructions comprising:

receiving a request for a video file stream to generate a thumbnail;

determining a beginning part of the video file stream and an end part of the video file stream based on one of;

a fixed data amount from a beginning and an end of the video file stream, respectively, and a percentage size of the entire video file stream;

generating the partial file stream with substantially similar attributes as the video file stream, by preserving the beginning part of the video file stream, inserting zeros in place of data in an empty middle part, and preserving the end part of the video file stream;

generating the thumbnail based on the partial file stream; and

transmitting at least one of the thumbnail and the partial file stream to a sandbox for processing.

18. The computer-readable memory device of claim 17, wherein data is replaced with zeros in the empty middle part employing New Technology File System (NTFS) sparse file feature.

19. The computer-readable memory device of claim 17, wherein the sandbox is one of:

a local process executed as a separate process at a computing device storing the instructions; and

a remote process executed in another computing system and accessed through a network.

20. The computer-readable memory device of claim 17, wherein instructions further comprise:

transmitting the thumbnail and metadata to a requesting user from the sandbox; and

transmitting a record of results from processing the partial file stream in the sandbox to an administrator.