Video HDR 只影响预览还是拍摄的图像？
Does Video HDR affect only the preview or also the captured image?
AVCaptureDevice有个属性叫isVideoHDREnabled. Does it affect only the preview, or also the captured image? The documentation没说。
我希望我的应用在 iOS 确定可以保证拍摄场景时自动拍摄 HDR 图像。支持时启用它有什么缺点吗？
我知道并非所有 device/camera 组合都支持此功能。问题是当它存在时它会做什么。
转自Apple developers guide (iPhone 6/ iPhone 6 Plus):
Single-Shot (Video) HDR
AKA “streaming HDR” or “video HDR”. The iPhone 6 and 6 Plus support
continuous, streaming high-dynamic-range video as opposed to the more
traditional method of fusing a bracket of still images with differing
EV values into a single high dynamic range photo. The HDR support is
built right into the sensor. This capability is referred to as “Video
HDR” in the API. All AVCaptureDeviceFormat objects for the
front-facing camera support video HDR. On the back-facing camera, the
540p30, 720p30, 1080p30, and 1080p60 formats support video HDR.
因此不仅可以预览，还可以保存 HDR 视频内容。据我了解，HDR Single-Shot / 视频 HDR 格式 应该没有缺点，但正如您在文档 link 表格中看到的那样，没有HDR 模式 (VHDR) 支持最高分辨率，因此您必须在牺牲分辨率以提高动态范围的优点和缺点之间做出选择。
AVCaptureDevice有个属性叫isVideoHDREnabled. Does it affect only the preview, or also the captured image? The documentation没说。
我希望我的应用在 iOS 确定可以保证拍摄场景时自动拍摄 HDR 图像。支持时启用它有什么缺点吗？
我知道并非所有 device/camera 组合都支持此功能。问题是当它存在时它会做什么。
转自Apple developers guide (iPhone 6/ iPhone 6 Plus):
Single-Shot (Video) HDR
AKA “streaming HDR” or “video HDR”. The iPhone 6 and 6 Plus support continuous, streaming high-dynamic-range video as opposed to the more traditional method of fusing a bracket of still images with differing EV values into a single high dynamic range photo. The HDR support is built right into the sensor. This capability is referred to as “Video HDR” in the API. All AVCaptureDeviceFormat objects for the front-facing camera support video HDR. On the back-facing camera, the 540p30, 720p30, 1080p30, and 1080p60 formats support video HDR.
因此不仅可以预览，还可以保存 HDR 视频内容。据我了解，HDR Single-Shot / 视频 HDR 格式 应该没有缺点，但正如您在文档 link 表格中看到的那样，没有HDR 模式 (VHDR) 支持最高分辨率，因此您必须在牺牲分辨率以提高动态范围的优点和缺点之间做出选择。