| 摘要 |
A presentation file is broadcast over a messaging channel during a messaging session. A video signal is generated in response to navigation of the presentation file within a presentation application. An encoded video stream suitable for transmission over a messaging network is derived from the generated video signal. The encoded video stream is transmitted over a messaging channel by a presenter to other members of a messaging session. As the presenter navigates the presentation pages locally, the encoded video stream is updated to provide the corresponding pages of the presentation to the messaging session members. The encoded video stream may be sent by a messaging application associated with a user or a virtual user, and may be embedded or mixed with other user video data.
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