我使用 Raspberry Pi 相机模块 V2 的 uv4l 驱动程序，这使我可以选择编码、帧速率等...
测试了以下编码：yuv420、nv21、yvu420、rgb565、rgb565x、bgr24、rgb24、rgba、bgra、mjpeg、jpeg、h264，帧率为 30。在所有情况下，当 chromium 尝试时，都会将以下内容打印到标准错误中通过 WebRTC 访问设备：
[1113:1152:0701/090110:ERROR:video_capture_device_factory_linux.cc(108)] Not implemented reached in void media::GetSupportedFormatsForV4L2BufferType(int, media::VideoCaptureFormats*)
[1113:1152:0701/090110:ERROR:video_capture_device_factory_linux.cc(72)] Not implemented reached in std::list<float> media::GetFrameRateList(int, uint32_t, uint32_t, uint32_t)
[1113:1152:0701/090110:ERROR:video_capture_device_factory_linux.cc(108)] Not implemented reached in void media::GetSupportedFormatsForV4L2BufferType(int, media::VideoCaptureFormats*)
[1113:1152:0701/090110:ERROR:video_capture_device_factory_linux.cc(72)] Not implemented reached in std::list<float> media::GetFrameRateList(int, uint32_t, uint32_t, uint32_t)
[1113:1152:0701/090110:ERROR:video_capture_device_factory_linux.cc(108)] Not implemented reached in void media::GetSupportedFormatsForV4L2BufferType(int, media::VideoCaptureFormats*)
[1113:1152:0701/090110:ERROR:video_capture_device_factory_linux.cc(72)] Not implemented reached in std::list<float> media::GetFrameRateList(int, uint32_t, uint32_t, uint32_t)
[1113:1152:0701/090110:ERROR:video_capture_device_factory_linux.cc(108)] Not implemented reached in void media::GetSupportedFormatsForV4L2BufferType(int, media::VideoCaptureFormats*)
[1113:1152:0701/090110:ERROR:video_capture_device_factory_linux.cc(72)] Not implemented reached in std::list<float> media::GetFrameRateList(int, uint32_t, uint32_t, uint32_t)
所有可能的配置都可以在这里找到： http://www.linux-projects.org/documentation/uv4l-raspicam/
问题：Chromium 可以处理的正确视频流（客户端）是什么？