Electron是否支持4K USB视频分辨率？

我们正在使用Electron框架开发一个windows应用程序。此应用程序旨在显示来自USB摄像头的视频流。我们正在使用“navigator.mediaDevices”API访问USB视频流。问题是电子应用程序无法使用4K USB视频分辨率，并抛出错误

我们可以看到视频流进入电子应用程序，但它只适用于较低的分辨率，例如480p，因此质量不达标。USB摄像头可支持4K分辨率。然而，当我们提供更高的分辨率时，它工作到720p，但超过720p时，它会产生“过度约束错误”。（下面是参考文献的代码片段）

我的问题是:

电子，这是建立在铬，有任何限制，就USB视频分辨率

Electron应用程序中是否存在4K USB视频分辨率支持

是否有任何参考代码为我们指明了正确的方向

以下是FFMPEG命令的响应：-

ffmpeg version N-94112-gbb11584924 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.1.1 (GCC) 20190621

  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt

  libavutil      56. 29.100 / 56. 29.100

  libavcodec     58. 53.100 / 58. 53.100

  libavformat    58. 28.100 / 58. 28.100

  libavdevice    58.  7.100 / 58.  7.100

  libavfilter     7. 55.100 /  7. 55.100

  libswscale      5.  4.101 /  5.  4.101

  libswresample   3.  4.100 /  3.  4.100

  libpostproc    55.  4.100 / 55.  4.100

[dshow @ 0000016c508c8dc0] DirectShow video device options (from video devices)

[dshow @ 0000016c508c8dc0]  Pin "Capture" (alternative pin name "0")

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1920x1080 fps=30 max s=1920x1080 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1920x1080 fps=30 max s=1920x1080 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x720 fps=30 max s=1280x720 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x720 fps=30 max s=1280x720 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=640x360 fps=30 max s=640x360 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=640x360 fps=30 max s=640x360 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x960 fps=30 max s=1280x960 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x960 fps=30 max s=1280x960 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1024x768 fps=30 max s=1024x768 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1024x768 fps=30 max s=1024x768 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=640x480 fps=30 max s=640x480 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=640x480 fps=30 max s=640x480 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x1024 fps=30 max s=1280x1024 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x1024 fps=30 max s=1280x1024 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x800 fps=30 max s=1280x800 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x800 fps=30 max s=1280x800 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1920x1080 fps=15 max s=1920x1080 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1920x1080 fps=15 max s=1920x1080 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x720 fps=15 max s=1280x720 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x720 fps=15 max s=1280x720 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=640x360 fps=15 max s=640x360 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=640x360 fps=15 max s=640x360 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x960 fps=15 max s=1280x960 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x960 fps=15 max s=1280x960 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1024x768 fps=15 max s=1024x768 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1024x768 fps=15 max s=1024x768 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=640x480 fps=15 max s=640x480 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=640x480 fps=15 max s=640x480 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x1024 fps=15 max s=1280x1024 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x1024 fps=15 max s=1280x1024 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x800 fps=15 max s=1280x800 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x800 fps=15 max s=1280x800 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=640x480 fps=15 max s=640x480 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=640x480 fps=15 max s=640x480 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=640x360 fps=15 max s=640x360 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=640x360 fps=15 max s=640x360 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=320x240 fps=15 max s=320x240 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=320x240 fps=15 max s=320x240 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=320x180 fps=15 max s=320x180 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=320x180 fps=15 max s=320x180 fps=30

---

我敢打赌，您的相机实际上不支持4k和底层浏览器引擎可以使用的编解码器。什么相机？FFmpeg告诉了你什么？@Brad上面提到的一个是我们对FFmpeg的回应。你的相机不能支持4k。我敢打赌，你的相机实际上不支持4k和底层浏览器引擎可以使用的编解码器。什么相机？FFmpeg告诉了你什么？@Brad上面提到的一个是我们对FFmpeg的回应。你的相机不支持4k。

ffmpeg version N-94112-gbb11584924 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.1.1 (GCC) 20190621

  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt

  libavutil      56. 29.100 / 56. 29.100

  libavcodec     58. 53.100 / 58. 53.100

  libavformat    58. 28.100 / 58. 28.100

  libavdevice    58.  7.100 / 58.  7.100

  libavfilter     7. 55.100 /  7. 55.100

  libswscale      5.  4.101 /  5.  4.101

  libswresample   3.  4.100 /  3.  4.100

  libpostproc    55.  4.100 / 55.  4.100

[dshow @ 0000016c508c8dc0] DirectShow video device options (from video devices)

[dshow @ 0000016c508c8dc0]  Pin "Capture" (alternative pin name "0")

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1920x1080 fps=30 max s=1920x1080 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1920x1080 fps=30 max s=1920x1080 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x720 fps=30 max s=1280x720 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x720 fps=30 max s=1280x720 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=640x360 fps=30 max s=640x360 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=640x360 fps=30 max s=640x360 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x960 fps=30 max s=1280x960 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x960 fps=30 max s=1280x960 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1024x768 fps=30 max s=1024x768 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1024x768 fps=30 max s=1024x768 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=640x480 fps=30 max s=640x480 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=640x480 fps=30 max s=640x480 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x1024 fps=30 max s=1280x1024 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x1024 fps=30 max s=1280x1024 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x800 fps=30 max s=1280x800 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=h264  min s=1280x800 fps=30 max s=1280x800 fps=60.0002

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1920x1080 fps=15 max s=1920x1080 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1920x1080 fps=15 max s=1920x1080 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x720 fps=15 max s=1280x720 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x720 fps=15 max s=1280x720 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=640x360 fps=15 max s=640x360 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=640x360 fps=15 max s=640x360 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x960 fps=15 max s=1280x960 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x960 fps=15 max s=1280x960 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1024x768 fps=15 max s=1024x768 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1024x768 fps=15 max s=1024x768 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=640x480 fps=15 max s=640x480 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=640x480 fps=15 max s=640x480 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x1024 fps=15 max s=1280x1024 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x1024 fps=15 max s=1280x1024 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x800 fps=15 max s=1280x800 fps=30

[dshow @ 0000016c508c8dc0]   vcodec=mjpeg  min s=1280x800 fps=15 max s=1280x800 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=640x480 fps=15 max s=640x480 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=640x480 fps=15 max s=640x480 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=640x360 fps=15 max s=640x360 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=640x360 fps=15 max s=640x360 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=320x240 fps=15 max s=320x240 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=320x240 fps=15 max s=320x240 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=320x180 fps=15 max s=320x180 fps=30

[dshow @ 0000016c508c8dc0]   pixel_format=yuyv422  min s=320x180 fps=15 max s=320x180 fps=30