Abstract: Methods and systems for producing a video stream. A first user is authenticated. A first primary video stream is captured showing the first user and comprising a first primary authentication video part. A fourth primary video stream is captured, visually showing the first user from a different point of view, comprising a fourth primary authentication video part. One-way functions of the first and fourth primary video streams are calculated, each being calculated using the respective primary authentication video part. The produced video stream is automatically produced based on the first primary video stream. For each of the one-way function outputs, the output is embedded into a least one of the video streams so that the embedding depends on content in a video stream which is not the same as the video stream into which the embedding is made. The output is stored and/or publicly published.

Abstract: Methods and systems, including computer software products, for providing a shared digital video stream. Primary digital video streams are collected from at least two digital video sources. The primary streams are individually analysed to detect at least one event. The primary streams are time-synchronised with respect to a common time reference. The time-synchronised primary streams are analysed to detect at least one pattern. The pattern detection is based on the detected event, firstly, video and/or audio information in at least two time-synchronised of the primary streams considered jointly or, secondly, video and/or audio information in a single primary stream spanning across at least two detected events. The shared stream is produced as an output digital video stream based on consecutively considered frames of the time-synchronised primary streams and the detected patterns. The output stream is continuously provided to a consumer of the shared digital video stream.

Abstract: Method, system and computer program product for providing a second digital video stream. In a collecting step, a first and a second primary digital video stream are collected from at least two different digital video sources. In a first production step, a first produced video stream is produced based on the first and second primary streams. In a second production step, the second stream is produced based on the first produced stream and also based on the first and second primary streams. In the second production step, the first and second primary streams are time-delayed so as to time-synchronise them with the first produced stream, taking into consideration a latency of the first produced stream resulting from the first production step, the second produced stream being produced based on the time-delayed first and second primary streams.

Abstract: A method and a system for managing sharing of a video in a collaboration session are disclosed. A sharing function obtains (B122) a synchronization time stamp of an audio frame of the collaboration session, wherein the audio frame is going to be used for synchronizing the shared video stream with the collaboration session. The sharing function determines, based on a video frame rate difference between the desired frame rate and a source frame rate of the video file, whether more, less or same number of video frames as in the video file are needed in the shared video stream. The sharing function iteratively retrieves (B140) video frames from the video file stored in the storage function (140). The sharing function provides (B160), by the sharing function (112), the shared video stream by sending said one or more generated video frames to the video communication service (110).

Abstract: Method, system and computer program product for providing a second digital video stream. In a collecting step, a first and a second primary digital video stream are collected from at least two different digital video sources. In a first production step, a first produced video stream is produced based on the first and second primary streams. In a second production step, the second stream is produced based on the first produced stream and also based on the first and second primary streams. In the second production step, the first and second primary streams are time-delayed so as to time-synchronise them with the first produced stream, taking into consideration a latency of the first produced stream resulting from the first production step, the second produced stream being produced based on the time-delayed first and second primary streams.

Abstract: Method, system and computer program product for providing a second digital video stream. In a collecting step, a first and a second primary digital video stream are collected from at least two different digital video sources. In a first production step, a first produced video stream is produced based on the first and second primary streams. In a second production step, the second stream is produced based on the first produced stream and also based on the first and second primary streams. In the second production step, the first and second primary streams are time-delayed so as to time-synchronise them with the first produced stream, taking into consideration a latency of the first produced stream resulting from the first production step, the second produced stream being produced based on the time-delayed first and second primary streams.

Abstract: Methods, systems, and computer program products for providing a shared digital video stream. A first and a second digital video stream are collected. The shared stream is produced based on the first stream so that the first source is visible in the shared stream, but so that the second source is not visible in the shared stream. The first and/or second stream are analysed to detect a trigger, based on detection of a predetermined image and/or audio pattern, the trigger being a detected gazing or a gesture. The shared stream based on the second stream and/or based on the first source but with at least one of a different cropping, a different zooming, a different panning, or a different focus plane selection. The output stream is provided to a consumer.

Abstract: Methods and systems, including computer software products, for providing a shared digital video stream. Primary digital video streams are collected from at least two digital video sources. The primary digital video streams are time-synchronised with respect to a common time reference. The time-synchronised streams are analysed to detect at least one pattern selected from a first set of patterns. The shared digital video stream is produced as an output digital video stream based on consecutively considered frames of the time-synchronised streams and the detected patterns. The output digital video stream is continuously provided. The synchronisation introduces latency, which gets included in the output digital video stream. The pattern detection includes considering information of the primary streams that is present in a later frame than a frame of a time-synchronised primary stream yet to be used in the production of the output stream.

Abstract: Method, systems and computer program product for providing a shared digital video stream. A first and a second digital video stream are collected. The shared stream is produced based on said first stream, so that the first source is visible in the shared stream, but so that the second source is not visible in the shared stream. A latency with respect to the first and the second digital video stream is deliberately introduced. The first and/or second stream are analyzed in to detect a trigger, based on detection of a predetermined image and/or audio pattern. The shared stream is produced based on the second stream and/or based on the first source, but with at least one of: a different cropping, a different zooming, a different panning or a different focus plane selection. The output stream is provided to a consumer.

Abstract: Method and systems for managing sharing of a video in a collaboration session. A central server obtains a synchronization time stamp of an audio frame, relating to the session, to be used for synchronizing the shared video stream with the session. The central server determines, based on a video frame rate difference for the video file, whether more, less or same number of video frames are needed, and sets up a buffer for provisioning the shared video stream to the session. The central server iteratively retrieves video frame by video frame of the video file and generates zero, one, or more video frames according to the determination, with a desired resolution, while setting a time stamp of each generated video frame corresponding to the desired frame rate. The shared video stream is provided by inserting the generated video frames into the buffer.