HarmonyOS 鸿蒙Next：怎么把yuv格式转换成jpeg

1. // 返回相机帧的回调
2. private frameCallback: AsyncCallback<customScan.ScanFrame> =
3. async (error: BusinessError, frameResult: customScan.ScanFrame) => {
4. if (error) {
5. hilog.error(0x0001, TAG, Failed to get ScanFrame by callback. Code: ${error.code}, message: ${error.message});
6. return;
7. }
8. // byteBuffer相机YUV图像数组
9. hilog.info(0x0001, TAG,
10. Succeeded in getting ScanFrame.byteBuffer.byteLength: ${frameResult.byteBuffer.byteLength})
11. hilog.info(0x0001, TAG, Succeeded in getting ScanFrame.width: ${frameResult.width})
12. hilog.info(0x0001, TAG, Succeeded in getting ScanFrame.height: ${frameResult.height})
13. this.scanFrameResult = JSON.stringify(frameResult.scanCodeRects);
14. let newWidth = frameResult.height;
15. if (frameResult && frameResult.scanCodeRects && frameResult.scanCodeRects.length > 0 && !this.scanFlag) {
16. if (frameResult.scanCodeRects[0]) {
17. this.stopCamera();
18. this.scanCodeRect = [];
19. this.scanFlag = true;
20. // 码图位置信息转换
21. this.changeToXComponent(frameResult);
22. } else {
23. this.scanFlag = false;
24. }
25. }
26. }

customScan的扫码功能会返回一个frameResult.byteBuffer。这个是ArrayBuffer类型的。

按照正常应该是可以直接保存成jepg格式的。但是这个frameResult.byteBuffer是YUV格式的。直接用的话会失败。可不可以转化成鸿蒙能识别并展示的图片格式。

也考虑过用相机双流。但是双流好像就不能扫码了。