Generating Moving Thumbnails For Videos

A non-transitory computer-readable medium storing instructions that, when executed by a processing device, cause the processing device to perform operations comprising:

• sampling a plurality of video frames of a video item;
• determining frame-level quality scores for the sampled video frames;
• determining, by the processing device, a plurality of group-level quality scores for a plurality of groups of the sampled video frames using the frame-level quality scores of the sampled video frames, wherein the plurality of groups is defined by applying a sliding window to the sampled video frames;
• selecting one of the plurality of groups of the sampled video frames based on the plurality of group-level quality scores, wherein the selected group of sampled video frames includes a set of consecutively sampled video frames and has a start timestamp associated with a first sampled video frame in the set of consecutively sampled video frames and an end timestamp associated with a last sampled video frame in the set of consecutively sampled video frames;
• and
• creating a moving thumbnail comprising a subset of the plurality of video frames that have timestamps within a range from the start timestamp to the end timestamp.

A system comprising:

• a memory to instructions;
• and
• a processing device that, when executing the instructions, to:
• sample a plurality of video frames of a video item;
• determine frame-level quality scores for the sampled video frames;
• determine a plurality of group-level quality scores for a plurality of groups of the sampled video frames using the frame-level quality scores of the sampled video frames, wherein the plurality of groups is defined by applying a sliding window to the sampled video frames;
• select one of the plurality of groups of the sampled video frames based on the plurality of group-level quality scores, wherein the selected group of sampled video frames includes a set of consecutively sampled video frames and has a start timestamp associated with a first sampled video frame in the set of consecutively sampled video frames and an end timestamp associated with a last sampled video frame in the set of consecutively sampled video frames;
• and
• create a moving thumbnail comprising a subset of the plurality of video frames that have timestamps within a range from the start timestamp to the end timestamp.