Patent ID: 8774599

Claim:
A method for transcoding and playing back video files based on GRID technology in devices having limited computing power, wherein a transcoding/playback multimedia application and a GRID middleware are previously provided, both integrated in a user device, wherein said method comprises the following steps: providing the user device with a user interface for selecting a video file through the transcoding/play back application; verifying that the user is registered in the GRID by means of the GRID middleware and establishing a secure communication mechanism between said user and the GRID through integrity and security means integrated in the GRID itself; enabling the user to select the video file which must be played back; enabling the user to select the quality parameters for transcoding the video file by means of selecting a codec and a resolution; storing the user selected quality parameters in a JSDL file which has been previously generated by a GRID connector module which is a module communicating the GRID middleware with the multimedia application of the user device by means of an application interface; sending a transcoding run request together with the JSDL file to the GRID through the GRID connector module from the user device by means of using APIs included in the GRID middleware; generating a transcoded video file by means of performing the transcoding in the GRID with the parameters stored in the JSDL file; storing said video file in a GRID user file system; and playing back the video file.