Video frame extraction. More...
#import <NvsVideoFrameRetriever.h>
Instance Methods | |
| (void) | - setFrameTimeTolerance: |
| Set the time tolerance for acquiring video frames. The actual time of the generated images will be within the range [time-timeToleranceļ¼time+timeTolerance] and may differ from the requested time for efficiency.Pass 0 for to request frame-accurate image generation; this may incur additional decoding delay.Default is 500000. More... | |
| (UIImage *) | - getFrameAtTime:videoFrameHeightGrade: |
| Gets a video frame image at a certain moment. For details, please refer to Video Frame Image Extraction. More... | |
| (UIImage *) | - getFrameAtTimeWithVideoFrameHeight:videoFrameHeight: |
| Gets a video frame image at a certain time which users can customize the height of the video frame. For details, please refer to Video Frame Image Extraction. More... | |
Detailed Description
Video frame extraction.
The video frame extraction class can acquire the original video frame image at a certain moment.
- Warning
- In the NvsVideoFrameRetriever class, all public APIs can be used not only in the UI thread, but also across threads! ! !
- Since
- 1.2.0
Method Documentation
◆ getFrameAtTime:videoFrameHeightGrade:
| - (UIImage *) getFrameAtTime: | (int64_t) | time | |
| videoFrameHeightGrade: | (NvsVideoFrameHeightGrade) | videoFrameHeightGrade | |
Gets a video frame image at a certain moment. For details, please refer to Video Frame Image Extraction.
- Parameters
-
time the time value (in microseconds) videoFrameHeightGrade The height level of the extracted video frame
- Returns
- Returns a UIImage object representing the video frame image at a certain moment.
◆ getFrameAtTimeWithVideoFrameHeight:videoFrameHeight:
| - (UIImage *) getFrameAtTimeWithVideoFrameHeight: | (int64_t) | time | |
| videoFrameHeight: | (unsigned int) | videoFrameHeight | |
Gets a video frame image at a certain time which users can customize the height of the video frame. For details, please refer to Video Frame Image Extraction.
- Parameters
-
time the time value (in microseconds) videoFrameHeight Custom video frame height.
- Returns
- Returns a UIImage object representing the video frame image at a certain moment.
- Since
- 1.15.0
◆ setFrameTimeTolerance:
| - (void) setFrameTimeTolerance: | (int64_t) | timeTolerance |
Set the time tolerance for acquiring video frames. The actual time of the generated images will be within the range [time-timeToleranceļ¼time+timeTolerance] and may differ from the requested time for efficiency.Pass 0 for to request frame-accurate image generation; this may incur additional decoding delay.Default is 500000.
- Parameters
-
timeTolerance the time value (in microseconds)
- Since
- 2.20.0
The documentation for this class was generated from the following file:
- include/sdkcore/ios/NvsVideoFrameRetriever.h
