Patent ID: 9185468
Filing Date: 2015-11-10
Classification: G11B,H04N

Abstract:
1. A method of processing a file containing a presentation that is compatible with a media player application that reads media files compliant with MP4, wherein the presentation includes a first track comprising video data, the first track composed of fragments corresponding to respective intervals, said method comprising: adding to the file a second track comprising video data, the second track including pre-buffered data, wherein the pre-buffered data is composed of fragments corresponding to said intervals, whereby for each fragment of the pre-buffered data of the second track there is a corresponding fragment of the first track, and each track represents a timed sequence of frames, selecting, at a time of interest, a fragment of the second track included in the pre-buffered data for insertion sequentially in time next to one of the fragments of the first track, scanning the selected fragment of the second track and selecting an I frame within the selected fragment based on an earliest I frame of the second track subsequent to said time of interest, scanning the fragment of the first track corresponding to the selected fragment of the second track and selecting an I frame within the corresponding fragment, and constructing a media file compliant with MP4, wherein the media file contains a presentation including the first track and the second track utilizing data commencing with the selected I frame of the second track.