Video-segment identification systems and methods

1. A method, comprising:

receiving a plurality of intra-coded frames of an encoded video;

determining a start of a summarization segment for the encoded video as a first intra-coded frame of the plurality of intra-coded frames based on a first buffer-size delta between a first buffer size of the first intra-coded frame and a minimum buffer size of an intra-coded frame from a first set of the plurality of intra-coded frames exceeding a first threshold; and

determining an end of the summarization segment as a second intra-coded frame of the plurality of intra-coded frames based on a second buffer-size delta between a second buffer size of the second intra-coded frame and a maximum buffer size of a second set of the plurality of intra-coded frames exceeding a second threshold.

2. The method of claim 1 , further comprising:

selecting the first set of the plurality of intra-coded frames from the plurality of intra-coded frames that precede the first intra-coded frame.

3. The method of claim 1 , further comprising:

selecting the first set of the plurality of intra-coded frames from the plurality of intra-coded frames that are within a time window that precedes the first intra-coded frame.

4. The method of claim 1 , further comprising:

selecting the second set of the plurality of intra-coded frames from the plurality of intra-coded frames that precede the second intra-coded frame.

5. The method of claim 1 , further comprising:

selecting the second set of the plurality of intra-coded frames from the plurality of intra-coded frames that are within a time window that precedes the second intra-coded frame.

6. The method of claim 1 , wherein determining the start of the summarization segment for the encoded video as the first intra-coded frame comprises:

determining that the first buffer-size delta exceeds a segment start threshold.

7. The method of claim 1 , wherein determining the end of the summarization segment for the encoded video as the second intra-coded frame comprises:

determining that the second buffer-size delta exceeds a segment end threshold.

8. The method of claim 1 , further comprising:

generating a video presentation of the encoded video that includes the summarization segment.

9. The method of claim 1 , wherein determining the start of the summarization segment for the encoded video as the first intra-coded frame comprises:

determining that a time duration between the first intra-coded frame and an end of a previous summarization segment exceeds a minimum duration.

10. The method of claim 1 , wherein determining the end of the summarization segment for the encoded video as the second intra-coded frame comprises:

determining that a time duration between the first intra-coded frame and the second intra-coded frame exceeds a minimum duration.

11. The method of claim 1 , wherein determining the start of the summarization segment for the encoded video as the first intra-coded frame comprises:

selecting the first intra-coded frame from the plurality of intra-coded frames;

determining the first encoded-buffer size of the first intra-coded frame;

determining a minimum buffer size of an intra-coded frame from the first set of the plurality of intra-coded frames;

determining the first buffer-size delta between the first encoded-buffer size and the minimum buffer size; and

identifying the first intra-coded frame as a start frame of the summarization segment in response to the first buffer-size delta exceeding a segment start threshold.

12. The method of claim 1 , wherein determining the end of the summarization segment for the encoded video as the second intra-coded frame comprises:

selecting the second intra-coded frame from the plurality of intra-coded frames;

determining the second encoded-buffer size of the second intra-coded frame;

determining a maximum buffer size of an intra-coded frame from the second set of the plurality of intra-coded frames;

determining the second buffer-size delta between the second encoded-buffer size and the maximum buffer size; and

identifying the second intra-coded frame as an end frame of the summarization segment in response to the second buffer-size delta exceeding a segment end threshold.

13. A non-transitory computer-readable storage medium having stored thereon instructions that when executed by a processor, cause the processor to perform actions, the actions comprising:

receiving a plurality of intra-coded frames of an encoded video;

selecting a first intra-coded frame from the plurality of intra-coded frames;

determining a first encoded-buffer size of the first intra-coded frame;

determining a minimum buffer size of an intra-coded frame from a first set of the plurality of intra-coded frames;

determining a first delta between the first encoded-buffer size and the minimum buffer size;

identifying the first intra-coded frame as a start frame of a summarization segment for the plurality of intra-coded frames in response to the first delta exceeding a first threshold;

selecting a second intra-coded frame from the plurality of intra-coded frames;

determining a second encoded-buffer size of the second intra-coded frame;

determining a maximum buffer size of an intra-coded frame from a second set of the plurality of intra-coded frames;

determining a second delta between the second encoded-buffer size and the maximum buffer size; and

identifying the second intra-coded frame as an end frame of the summarization segment in response to the second delta exceeding a second threshold.

14. The non-transitory computer-readable storage medium of claim 13 , wherein the instructions that, when executed by the processor, cause the processor to perform further actions, the further actions comprising:

selecting the first set of the plurality of intra-coded frames as intra-coded frames from the plurality of intra-coded frames that precede the first intra-coded frame; and

selecting the second set of the plurality of intra-coded frames as intra-coded frames from the plurality of intra-coded frames that precede the second intra-coded frame.

15. The non-transitory computer-readable storage medium of claim 13 , wherein the instructions that, when executed by the processor, cause the processor to perform further actions, the further actions comprising:

selecting the first set of the plurality of intra-coded frames from the plurality of intra-coded frames that are within a first time window that precedes the first intra-coded frame; and

selecting the second set of the plurality of intra-coded frames from the plurality of intra-coded frames that are within a second time window that precedes the second intra-coded frame.

16. The non-transitory computer-readable storage medium of claim 13 , wherein identifying the first intra-coded frame as the start frame of the summarization segment comprises:

determining that a time duration between the first intra-coded frame and an end of a previous summarization segment exceeds a minimum duration.

17. The non-transitory computer-readable storage medium of claim 13 , wherein identifying the second intra-coded frame as the end frame of the summarization segment comprises:

determining that a time duration between the first intra-coded frame and the second intra-coded frame exceeds a minimum duration.

18. The non-transitory computer-readable storage medium of claim 13 , wherein the instructions that, when executed by the processor, cause the processor to perform further actions, the further actions comprising:

generating a video presentation of the encoded video that includes the summarization segment.

19. A computer, comprising:

a non-transitory memory that stores computer instructions; and

a processor communicatively coupled to the non-transitory memory that, in operation, executes the computer instructions to cause the processor to:

obtain a plurality of intra-coded frames of an encoded video;

select a first intra-coded frame from the plurality of intra-coded frames as a start frame of a summarization segment for the encoded video; and

for each respective intra-coded frame of the plurality of intra-coded frames after the first intra-coded frame:

determine a delta between an encoded-buffer size of the respective intra-coded frame and a maximum buffer size of an intra-coded frame from a set of the plurality of intra-coded frames that precede the respective intra-coded frame; and

identify the respective intra-coded frame as an end frame of the summarization segment in response to the delta exceeding a segment end threshold.

20. The computer of claim 19 , wherein the processor selects the first intra-coded frame as the start of the summarization segment by executing the computer instructions to further cause the processor to:

determine a second delta between an encoded-buffer size of the first intra-coded frame and a minimum buffer size of an intra-coded frame from a set of the plurality of intra-coded frames that precede the first intra-coded frame; and

identify the first intra-coded frame as the start frame of the summarization segment in response to the second delta exceeding a segment start threshold.