# 4K 至 1080p – 同时旋转（90/180/270）并缩小

Source: [https://docs.qualcomm.com/doc/80-70014-50Y/topic/4k-to-1080p-rotate-90-180-270-and-downscale-at-same-time.html](https://docs.qualcomm.com/doc/80-70014-50Y/topic/4k-to-1080p-rotate-90-180-270-and-downscale-at-same-time.html)

该 pipeline 显示来自摄像头的 4k 分辨率的视频流被缩小到 1080p 并旋转 180 度，然后显示在本地显示设备上。

Note: 要以不同的角度旋转视频，请参阅 [qtivtransform](https://docs.qualcomm.com/doc/80-70014-50Y/topic/qtivtransform.html) 中的 rotate 属性。

运行命令以执行 pipeline：
- Qualcomm Computer Vision SDK（fcv）引擎：

        gst-launch-1.0 -e qtiqmmfsrc ! video/x-raw\(memory:GBM\),format=NV12,width=3840,height=2160,framerate=30/1 ! qtivtransform engine=fcv rotate=180 ! video/x-raw\(memory:GBM\),format=NV12,width=1920,height=1080 ! waylandsink fullscreen=trueCopy to clipboard
- GLES 引擎：

        gst-launch-1.0 -e qtiqmmfsrc ! video/x-raw\(memory:GBM\),format=NV12,width=3840,height=2160,framerate=30/1,compression=ubwc ! qtivtransform engine=gles rotate=180 ! video/x-raw\(memory:GBM\),format=NV12,width=1920,height=1080 ! waylandsink fullscreen=trueCopy to clipboard

运行命令以使用 GLES 引擎执行 pipeline：

将显示来自摄摄像头的转换流。

如需停止用例，请按下 CTRL + C。

下图显示了 pipeline 执行流程：

![](data:image/png;base64,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)

**Parent Topic:** [转换和转码用例](https://docs.qualcomm.com/doc/80-70014-50Y/topic/transform-and-transcode-use-cases.html)

Last Published: Nov 11, 2025

[Previous Topic
离线 1080p 流到 1080p – 旋转（90/180/270）](https://docs.qualcomm.com/bundle/publicresource/80-70014-50Y/topics/offline-1080p-stream-to-1080p-rotate-90-180-270.md) [Next Topic
离线 4K 至 1080p – 同时旋转（90/180/270）和缩小](https://docs.qualcomm.com/bundle/publicresource/80-70014-50Y/topics/offline-4k-to-1080p-rotate-90-180-270-and-downscale-at-same-time.md)