Frame-level quality scores for video frames of a video item is determined. A sliding window is applied to the video frames to identify a plurality of groups of the video frames for scoring on a group-level. A plurality of group-level quality scores for the plurality of groups of video frames of the video item is determined using the frame-level quality scores of the video frames. One of the plurality of groups of video frames of the video item is selected based on the plurality of group-level quality scores. A moving thumbnail is created using the selected group of video frames selected based on the respective group level quality score.

Systems and methods provide techniques for reviewing content, such as reviewing video on a mobile device. A computing device with a touch screen interface, e.g., a tablet computer, executes a reviewing tool, e.g., a computer program, that causes the device to display video content and information about the video content. The tool provides an interface for selecting video, images, and information, for review and for annotation. The tool uses remote and/or local data to display video, images, and information for review.

Techniques are disclosed for performing a computer-implemented processing of slide presentation videos to automatically generate index locations corresponding to particular slides within a slide presentation video. In embodiments, a slide presentation video is uploaded to a video processing system. The video processing system performs an image analysis to identify each slide within the slide presentation and determine a time window for each occurrence of each slide. An audio analysis is performed to adjust the time window to the start of a sentence that precedes the introduction of the slide. A user interface includes one or more selectable links associated with each slide that link to a corresponding location within the slide presentation video. Similarly, a processed slide presentation video includes selectable links to index to the corresponding slide of the presentation.

A method for storing multi-lens recording file and multi-lens recording apparatus are provided. When at least one lens is driven for loop recording, a total recording capacity for loop recording is calculated based on setting data of the at least one lens driven. When a remaining capacity of a storage space is less than the total recording capacity, a file cleaning action is performed on multiple recorded files stored in the storage space for at least one lens. The file cleaning action includes: deleting the at least one recorded file stored in the storage space based on a recording time and a lens number until the remaining capacity is no less than the total recording capacity. When the remaining capacity of the storage space is no less than the total recording capacity, loop recording is performed through at least one lens being driven and a currently recorded file is stored.

The present disclosure is directed toward systems and methods for tracking objects in videos.

For example, one or more embodiments described herein utilize various tracking methods in combination with an image search index made up of still video frames indexed from a video.

One or more embodiments described herein utilize a backward and forward tracking method that is anchored by one or more key frames in order to accurately track an object through the frames of a video, even when the video is long and may include challenging conditions.

A recording apparatus, including: a photographing unit which picks up a moving picture and a still picture; a first encoder which encodes the moving picture and the still picture by a first encoding method; a second encoder which encodes the still picture by a second encoding method which is different from the first encoding method; and a recorder which records a file of the moving picture encoded by the first encoding method, a file of the still picture encoded by the first encoding method and a file of the still picture encoded by the second encoding method, on a recording medium, wherein both of the file of the still picture encoded by the first encoding method and the file of the still picture encoded by the second encoding method, are based on one still picture picked up with a single photographing.

A method of generating a moving thumbnail is disclosed. The method includes sampling video frames of a video item. The method further includes determining frame-level quality scores for the sampled video frames. The method also includes determining multiple group-level quality scores for multiple groups of the sampled video frames using the frame-level quality scores of the sampled video frames. The method further includes selecting one of the groups of the sampled video frames based on the multiple group-level quality scores. The method includes creating a moving thumbnail using a subset of the video frames that have timestamps within a range from the start timestamp to the end timestamp.

Techniques are disclosed for performing a computer-implemented processing of slide presentation videos to automatically generate index locations corresponding to particular slides within a slide presentation video. In embodiments, a slide presentation video is uploaded to a video processing system. The video processing system performs an image analysis to identify each slide within the slide presentation and determine a time window for each occurrence of each slide. An audio analysis is performed to adjust the time window to the start of a sentence that precedes the introduction of the slide. A user interface includes one or more selectable links associated with each slide that link to a corresponding location within the slide presentation video. Similarly, a processed slide presentation video includes selectable links to index to the corresponding slide of the presentation.

A system and method of generating a composite frame from a video capturing a plurality of persons. The method comprises determining a plurality of frames corresponding to occurrence of a predetermined event in the video; determining an importance score for each of the plurality of persons in the determined plurality of frames, the importance score determined based on a type of interaction detected between each of the plurality of persons with an activity object; and selecting one or more of the plurality of persons based on the determined importance score to generate a composite frame of the event including the selected one or more persons.

Systems, methods, and media for synchronization of independent sensors and recording devices are provided. A method includes recording, through a synchronizing sensor, sensor data detected from an event. The method may further output from the synchronizing sensor, the sensor data from the event and a periodic synchronizing signal. The method also generates, from a recorder, recorded event data comprising the periodic synchronizing signal and first additional data recorded from the event. The method outputs the recorded event data from the recorder. The method receives the sensor data from the event and the recorded event data. The method synchronizes according to the periodic synchronizing signal, at the computing device, the recorded event data and the sensor data from the event.