비디오 캐시 질문입니다

Question

앱 개발하는 프로젝트를 진행중에 어플 내에 동영상 로딩속도를 빠르게 하기위해 동영상 파일을 로컬에 캐시를 하기위한 방법을 찾고있습니다사용자가 동영상 시청을원활하게 할수있게 어느 시점에 파일들을 캐시를 해야하는지 궁금합니다.이 부분에 잘아시는분있다면전체적인 과정을 설명해주시면 감사하겠습니다

mirheeoj · Answer

이건 구체적인 방법보다도 어떻게 사용자가 볼 동영상을 예측할 수 있느냐가 열쇠라 일반론이 얼마나 도움이 될지 모르겠습니다. 예를 들어 다음과 같은 전략이 필요한거죠. 인트로 동영상같은 누구나 반드시 봐야 되는 영상이라면: 앱 설치할때 같이 다운로드 3-4개 정도의 분기를 선택한다: 해당 분기가 나오기 전에 3-4개 영상을 미리 다운로드사용자들이 주로 사용하는 페이지/기능 패턴이 뚜렷하게 존재한다: 해당 루트에서 나오는 영상만 미리 다운로드 완전 랜덤이고 뭘 볼지는 알 수 없으나 어쨌든 빠르게 로딩을 해주고 싶다: 비디오를 스케일러블 포맷으로 서버에 저장하고 재생은 일단 저화질로 시작한다. 그러나 이런 건 단편적인 전술이고 최적화하려면 결국 해당 앱 사용자들의 패턴을 알아야 합니다. 여기에 머신러닝을 접목해볼 수도 있겠죠. 이하 chatgpt의 답변입니다. 모두 맞는 얘기이나, 결국 상황에 맞는 전략이 필수입니다. Minimizing video download time for your app users is crucial for providing a smooth and efficient user experience. Pre-downloading videos is a great strategy to achieve this goal. Here are several strategies you can use:1. *Content Prediction and Preloading*: Utilize predictive algorithms to anticipate which videos a user is likely to watch next based on their viewing history or current behavior. Preload these videos in the background while the user is still watching the current video, ensuring that the next video is ready to play with minimal delay.2. *Prefetching*: Instead of waiting for the user to request a video, proactively fetch and cache videos in the background when the app is idle or when the user is on a stable network connection. This way, when the user eventually clicks on a video, it's already available locally, reducing download time.3. *Adaptive Bitrate Streaming*: Implement adaptive bitrate streaming for videos. This technique adjusts the quality of the video stream based on the user's current network conditions. Lower-quality versions of the video can be preloaded first to minimize buffering during playback.4. *Queue-Based Preloading*: Create a queue of videos that the user might be interested in watching. Preload videos in this queue, prioritizing the ones at the top, so that they are ready to play when the user selects them.5. *Background Downloading*: Allow the app to continue downloading videos even when it's in the background or the user is using other features of the app. This ensures that videos are ready when the user decides to watch them.6. *Smart Caching*: Use smart caching mechanisms that take into account factors like the size of the video, the user's device storage, and the likelihood of the video being watched. Delete cached videos that are less likely to be watched to make room for new preloaded content.7. *User Settings*: Provide users with options to control preloading behavior. Some users might prefer to manually trigger preloading, especially if they are concerned about data usage or storage space.8. *Local Storage Management*: Implement a local storage management system that monitors cached videos' age and usage. Older, less frequently watched videos can be automatically removed to make space for new preloaded content.9. *Wi-Fi Only Preloading*: Give users the option to only allow preloading when they are connected to a Wi-Fi network. This prevents unwanted data usage and ensures a smoother experience.10. *Progressive Loading*: Start streaming the video as soon as the initial portion is downloaded, allowing users to start watching while the rest of the video continues to download in the background.11. *Content Delivery Networks (CDNs)*: Use CDNs to host your videos. CDNs distribute content across multiple servers, reducing the distance and time it takes for users to access the videos.12. *Optimize Video Formats*: Choose efficient video formats and codecs that balance quality and file size. This can significantly impact download times.Remember that the most effective strategy might depend on your app's specific use case, target audience, and technical requirements. Combining several of these strategies can further enhance the efficiency of pre-downloading videos for your app users.

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