A method for determining multimedia editing information includes: obtaining a first playback time of a first target frame in first multimedia data to be edited, a second playback time of the first target frame for second multimedia data after editing and a playback multi-times speed set for the first multimedia data; determining, based on the first playback time and the second playback time, a time deviation that occurs while editing the first multimedia data at the playback multi-times speed for the first multimedia data; and determining, based on the time deviation, the first playback time, the second playback time and the playback multi-times speed, a playback time of the first multimedia data corresponding to each playback time of the second multimedia data after the second playback time.

Examples of video encoding methods and apparatus and video decoding methods and apparatus are described. An example method of video processing includes performing a conversion between a video including one or more layers and a bitstream of the video according to a rule, wherein the rule specifies, in a process of sub-bitstream extraction to output an output sub-bitstream, whether to generate non-scalable nested supplementary enhancement information (SEI) messages by extracting scalable-nested SEI messages from a scalable nesting SEI message based on a first flag indicating whether the SEI message applies to specific output layer sets (OLSs) and a second flag indicating whether the SEI message applies to all subpictures or only to specific subpictures.

A display apparatus and a controlling method thereof provides an optimal viewing environment to a user by differently applying image processing parameters related to image processing time according to content types of input images. A display apparatus according to an embodiment includes an input interface receiving an input image; and a controller configured to determine an image processing parameter based on characteristics of the input image, and control an image processing time for the input image to be determined in response to the determined image processing parameter.

A method for forming an image sequence that is an output sequence, from an input image sequence, is provided. The input image sequence has an input spatial resolution and an input temporal resolution. The output sequence has an output temporal resolution equal to the input temporal resolution and an output spatial resolution equal to a predetermined fraction 1/N of the input spatial resolution by an integer number N higher than or equal to 2. The method, implemented for a sub-sequence of the input frame sequence that is a current input sub-sequence and including a preset number of images, includes: obtaining a temporal frequency that is an image frequency, associated with the current input sub-sequence; processing the current input sub-sequence to obtain an output sub-sequence; and inserting the output sub-sequence and the associated image frequency into an output container.

Methods, systems, and apparatus, including a media player and computer-readable mediums, are described for rendering media content at a frame rate that is safe to a user. A system, or its media player, obtains media content that includes video content having multiple frames. The system determines a frame rate representing a rate for sequentially displaying the frames to the user when the media player plays the media content. Image content of each frame is scanned and data describing different photosensitivity thresholds is obtained. Based on a photosensitivity of the user, the system determines that one or more frames in a portion of the media content include image content that is unsafe to the user when the media player plays the media content. The system selectively decreases a frame playback rate for the portion of the media content as a function of an input value that is selectable by the user.

A data processing method and apparatus, and an electronic device, a system and a storage medium are provided. The method is applicable to a main thread in a Web client and includes: obtaining audio and video data of a target video from a server decapsulating the obtained audio and video data to obtain first audio and video data; sending the first audio and video data to a target sub-thread in the Web client, so that the target sub-thread decodes the first audio and video data to obtain second audio and video data and sends the second audio and video data to the main thread; receiving the second audio and video data sent by the target sub-thread; and rendering video data in the second audio and video data by using a rendering module of a browser of the Web client, and taking the rendered video data and audio data in the second audio and video data as to-be-played data for the target video. The technical solution according to the embodiment of the present application allows a Web client to play audio and video data without browser plug-ins.

Systems and methods are provided for customizing the playback speed of a media player. One example method includes receiving a media content item and identifying a playback speed for at least a portion of the media content item. An adjustable playback speed user interface element is generated for display, wherein the user interface element is preset to the identified playback speed. The playback speed user interface element is adjustable in that at least a portion of the playback speed user interface element is movable from a first position to a second position. An interaction with the adjustable playback speed user interface element is identified and the portion of the media content item is generated for output at the identified playback speed.

Metadata and methods for variable-frame rate (VFR) video playback are presented. Proposed metadata include syntax parameters related to the presentation time duration, picture source type (e.g., original, duplicate, or interpolated), picture position in a scene (e.g., first, last, or in the middle), and motion-related information with respect to a previous picture. A decoder may use these metadata to apply appropriate frame-rate conversion techniques to reduce artifacts during VFR playback.

One embodiment of the present invention is a method for broadcasting information to one or more client devices from a broadcaster that is not a client device, which one or more client devices utilize presentation rates to present audio in broadcast information at various presentation rates using time-scale modification, and which method includes: (a) the broadcaster broadcasting non-time-scale modified information; and (b) the broadcaster broadcasting guidance information used to determine presentation rates for use by the one or more client devices in presentation of audio in the broadcast information using time-scale modification; wherein the guidance information is broadcast prior to or after a time of broadcast of the broadcast information.

A device includes a camera configured to capture an image, and a processor configured to determine whether the image acquired from the camera includes an area having a shape corresponding to a reference object, when the image includes the area, transmit image data corresponding to the image at a first frame rate to another device, and when the image does not include the area, transmit, to the other device, the image data at a second frame rate less than the first frame rate.