Method for detecting black bar included in video content, and electronic device therefor

1. An electronic device comprising:

a display;

a processor; and

a memory operatively connected with the processor,

wherein the memory stores instructions that, when executed, cause the processor to:

based on a request related to playing of a video content, play the video content,

obtain time information corresponding to a detection period of a black bar in the video content, wherein the detection period of the black bar is set based on at least one of a remaining capacity of a battery of the electronic device or whether there exists a subtitle file related to the video content,

while the video content is being played, detect the black bar using at least one image frame of the video content corresponding to the detection period based on the time information,

based on the detection of the black bar, display an icon indicating that the black bar has been detected,

based on receiving an user input for the icon, adjust a size of an image area of the video content being played based on the detected black bar in the video content and a resolution of the display,

while the video content of which the size of the image area is adjusted is being played, based on detecting a change an aspect ratio of the video content of which the size of the image area is adjusted, re-detect the black bar included in the video content of which the aspect ratio is changed,

while re-detecting the black bar, restore the size of the adjusted image area, and

re-adjust the size of the image area of the video content based on the re-detected black bar in the video content and the resolution of the display.

2. The electronic device of claim 1 , wherein a start offset of the detection period of the black bar is set based on at least one of an application for playing the video content or a type of another content that is played through the application before the video content.

3. The electronic device of claim 2 , wherein the instructions cause the processor to:

identify whether the start offset of the detection period arrives while the video content is being played, based on a timer related to the playing of the video content or time stamp information corresponding to an image frame of the video content; and

when the start offset of the detection period arrives, detect the black bar using the at least one image frame of the video content corresponding to the detection period.

4. The electronic device of claim 1 , wherein the instructions cause the processor to:

identify the image area in the video content, based on the black bar in the video content; and

based on the resolution of the display, render the image area of the video content being played.

5. The electronic device of claim 1 , wherein the instructions cause the processor to:

when a channel for receiving a content from an external electronic device is changed while the video content is being played, detect the black bar using the at least one image frame of the video content corresponding to the detection period; and

based on the black bar in the video content and the resolution of the display, adjust the size of the image area of the video content being played.

6. The electronic device of claim 1 , wherein the video content is stored in the memory or is received from an external electronic device.

7. An operating method of an electronic device, the method comprising:

based on a request related to playing of a video content, playing the video content;

obtaining time information corresponding to a detection period of a black bar in the video content, wherein the detection period of the black bar is set based on at least one of a remaining capacity of a battery of the electronic device or whether there exists a subtitle file related to the video content;

while the video content is being played, detecting the black bar using at least one image frame of the video content corresponding to the detection period based on the time information;

based on the detection of the black bar, displaying an icon indicating that the black bar has been detected;

based on receiving an user input for the icon, adjusting a size of an image area of the video content being played based on the detected black bar in the video content and a resolution of a display of the electronic device;

while the video content of which the size of the image area is adjusted is being played, based on detecting a change an aspect ratio of the video content of which the size of the image area is adjusted, re-detecting the black bar included in the video content of which the aspect ratio is changed;

while re-detecting the black bar, restoring the size of the adjusted image area; and

re-adjusting the size of the image area of the video content based on the re-detected black bar in the video content and the resolution of the display.

8. The method of claim 7 , wherein a start offset of the detection period of the black bar is set based on at least one of an application for playing the video content or a type of another content that is played through the application before the video content.

9. The method of claim 7 , wherein adjusting the size of the image area of the video content being played comprises:

identifying the image area in the video content, based on the black bar in the video content; and

based on the resolution of the display, rendering the image area of the video content being played.

10. The method of claim 7 , further comprising:

when a channel for receiving a content from an external electronic device is changed while the video content is being played, detecting the black bar using the at least one image frame of the video content corresponding to the detection period; and

based on the black bar in the video content and the resolution of the display, adjusting the size of the image area of the video content being played.