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In this article, the editor introduces in detail "what are the functions and technologies included in SDK", with detailed contents, clear steps and proper handling of details. I hope that this article "what are the functions and technologies included in SDK can help you solve your doubts?" the following is followed by the editor's ideas slowly in depth, together to learn new knowledge.

Short video shooting

1. Breakpoint continuation: in the shooting process, it can be shot in segments, and all the final content can be synthesized into a video.

two。 Remake function: if you are not satisfied with the content of the short video shot, you can directly cut this part of the content and remake it. Through the remake function combined with breakpoint continuous shooting, the short video can be edited and filmed many times to enhance the convenience and flexibility of video production.

Short video beautification

1. Custom background music: in the short video editing function, you are free to add your favorite background music. Usually, you can customize the background music to support your own recording or choose the existing music in App.

two。 Stickers: after the shooting of the short video, you can choose to add different stickers. There are two kinds of stickers: scene stickers and face stickers.

3. Filter: the short video shot can choose different scene filters and adjust the degree of beautification.

4. Watermark: after shooting a short video, you can add different watermarks to the short video to protect the copyright of the short video. These two functions are the core functions of short video beautification.

Customize the interface layout and UI style

Customizing the interface layout and UI style refers to the function that App icons and function point locations can be moved and transformed and modified to different UI styles.

Realization of function and technology

1. Breakpoint shooting function

During the breakpoint shooting, you need to directly call the system API or the third-party camera library to save each video clip in mov format as a temporary file and store it in sandboxie directory. Then maintain the address list of video clips, wait until the end of shooting, synthesize each video clip pointed to in the address list (if you do not need to implement the deletion function, you do not have to maintain the video address list, read all the temporary video clips stored during a single recording, and synthesize them), and finally generate a complete short video.

two。 Remake (delete) function

It needs to be implemented on the basis of the breakpoint resume function. According to the breakpoint continuation implementation method, the remake function needs to maintain a video clip address list, and only the corresponding video clip address in the video list needs to be deleted during the playback operation. In the end, only the video clips pointed to in the address list are synthesized. after the synthesis is completed, all temporary video clips recorded this time can be deleted.

3. Custom background music function

First of all, the video source needs to be separated into two tracks: audio track and video track. The background music material strips off the audio track and inserts the background music audio track into the audio track of the original sound. You can adjust the volume of the original sound and background music through AVMutableAudioMixInputParameters. After the background music is successfully inserted, the audio track and the previous video track are synthesized by calling the relevant classes of AVMutableComposition, and finally exported as a short video.

Sticker function

Need to use face detection function

The main results are as follows: (1) through the CoreImage library of the system, because the CoreImage library already provides CIDetector, it is very suitable for face detection.

(2) face recognition is carried out through the open source cross-platform computer vision and machine learning database in the third-party database OpenTV.

5. Filter function

Most of the filters of short video SDK use the third-party image processing library-GPUImage library. GPU is used to process images and comes with a large number of high-quality image processing filters. GPUImage also supports custom filters when these basic features do not meet the needs of actual development. Beauty filter is a combination of filters, which can be achieved by combining luminance (GPUImageBrightnessFilter) and bilateral filtering (GPUImageBilateralFilter). If you want to achieve better results, you can add additional filters or adjust filter parameters.

6. Watermarking function

The watermark is mainly converted into image data through GPUImageUIElement, and then the two image data are merged through BlenderFilter, in which the View can be adjusted dynamically through setFrameProcessingCompletionBlock callback, so as to achieve the effect of dynamic change of watermark.

7. Customize the interface layout and UI style

UI and SDK are highly separated while maintaining their real-time performance, and the functional logic and UI logic of SDK are subdivided. This requires putting parts of the UI code into Demo and functional logic into SDK. Ensure that SDK provides complete interaction between API and UI layer, so that UI layer can adjust UI style in time according to the callback of SDK.

After reading this, the article "what are the functions and technologies included in SDK?" has been introduced. If you want to master the knowledge points of this article, you still need to practice and use it yourself. If you want to know more about related articles, you are welcome to follow the industry information channel.

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