是否能获取网络视频的封面,现在会报错 about react-native-thumbnail HOT 9 OPEN

你可以用https://github.com/itinance/react-native-fs 下载视频成为一个 file
然后用 RNThumbnail 取thumbnail

const url = '/path/to/remote/file'
const filePath = RNFS.DocumentDirectoryPath + '/video.mp4';

RNFS.downloadFile(url, filePath).promise.then(res => {
  RNThumbnail.get(filePath).then((result) => {
    console.log(result.path); // thumbnail path
  })
});

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会出现偶尔会出错的情况吗,我这边偶尔会失败,

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let thumbnail = await RNThumbnail.get(video.path);
偶尔会失败取不到

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@wulala1997 什么原因？有log吗？

try {
  let thumbnail = await RNThumbnail.get(video.path);
} catch (e) {
  console.error(e)
}

会有log

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处理的视频==> file:///storage/emulated/0/Pictures/video-2d880eef-a48a-4087-8239-cd0f2f3704058393300293092977467.mp4

Error: Attempt to invoke virtual method 'boolean android.graphics.Bitmap.compress(android.graphics.Bitmap$CompressFormat, int, java.io.OutputStream)' on a null object reference
Error: Attempt to invoke virtual method 'boolean android.graphics.Bitmap.compress(android.graphics.Bitmap$CompressFormat, int, java.io.OutputStream)' on a null object reference
at createErrorFromErrorData (blob:http://localhost:8081/adc8e4f3-6ae3-4477-b98c-04a67572c11c:14608:17)
at blob:http://localhost:8081/adc8e4f3-6ae3-4477-b98c-04a67572c11c:14567:27
at MessageQueue.__invokeCallback (blob:http://localhost:8081/adc8e4f3-6ae3-4477-b98c-04a67572c11c:15429:18)
at blob:http://localhost:8081/adc8e4f3-6ae3-4477-b98c-04a67572c11c:15155:18
at MessageQueue.__guard (blob:http://localhost:8081/adc8e4f3-6ae3-4477-b98c-04a67572c11c:15343:13)
at MessageQueue.invokeCallbackAndReturnFlushedQueue (blob:http://localhost:8081/adc8e4f3-6ae3-4477-b98c-04a67572c11c:15154:14)
at http://localhost:8081/debugger-ui/debuggerWorker.js:80:58

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可能是错误在这 image.compress(Bitmap.CompressFormat.JPEG, 100, fOut);

因为

Bitmap image = retriever.getFrameAtTime(1000000, MediaMetadataRetriever.OPTION_CLOSEST_SYNC);

所以视频不到1秒那就没有 retriever.getFrameAtTime(1000000, MediaMetadataRetriever.OPTION_CLOSEST_SYNC);
你检查你的视频是否不到一秒。

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好的,十分感谢.抱歉打扰您中午休息了

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没问题，我在越南现在还是工作时间。

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