Technique for synchronizing rendering of video frames with rendering of auxiliary media

A method of rendering video frames in synchronization with auxiliary media by a media client, the method comprising:

• receiving a sequence of media file segments, each media file segment comprising a plurality of video frames, wherein rendering of a sub-sequence of the media file segments is to be overlaid with rendering of auxiliary media starting in a first media file segment of the sub-sequence;
• determining, from control information included the sub-sequence of media file segments and for a respective one of the media file segments of the sub-sequence, how much rendering of the auxiliary media has progressed upon rendering the respective media file segment;
• and
• rendering the video frames of the respective media file segment of the sub-sequence and rendering the auxiliary media in accordance with the determined progression.

A controller configured to initiate tagging of media file segments with control information for a synchronized rendering of video frames included in the media file segments and auxiliary media by a media client, the controller being configured to:

• determine, from a sequence of media file segments, a sub-sequence of media file segments, wherein rendering of the sub-sequence is to be overlaid by rendering of auxiliary media starting in a first media file segment of the sub-sequence;
• determine control information enabling the media client to determine how much rendering of the auxiliary media has progressed upon rendering of each media file segment of the sub-sequence;
• and
• initiate a tagging of the media file segments of the sub-sequence with the control information.

A media client configured to render video frames in synchronization with auxiliary media, the media client being configured to:

• receive a sequence of media file segments, each media file segment comprising a plurality of video frames, wherein rendering of a sub-sequence of the media file segments is to be overlaid with rendering of auxiliary media starting in a first media file segment of the sub-sequence;
• determine, from control information included the sub-sequence of media file segments and for a respective one of the media file segments of the sub-sequence, how much rendering of the auxiliary media has progressed upon rendering the respective media file segment;
• and
• render the video frames of the respective media file segment of the sub-sequence and rendering the auxiliary media in accordance with the determined progression.