[linux-uvc-devel] Support for 1080p FHD / 4K UHD H.264 streams for modern webcams (UVC 1.5?)

[Kẏra ​ <kx...@ri...>]

Hello,

I'm wondering how to determine what prevents me from using my Logitech BRIO
with 4k resolution and an H.264 stream. Does this have to do with (lack of)
UVC 1.5 support, and is there a place to track UVC 1.5 support for linux?

Also, if donating my webcam to a developer would help, I would be happy to
do that. Currently, these are the streams that appear to be available:

~> v4l2-ctl --list-formats
ioctl: VIDIOC_ENUM_FMT
    Index       : 0
    Type        : Video Capture
    Pixel Format: 'MJPG' (compressed)
    Name        : Motion-JPEG

    Index       : 1
    Type        : Video Capture
    Pixel Format: 'YUYV'
    Name        : YUYV 4:2:2

~> v4l2-ctl --list-formats --all
Driver Info (not using libv4l2):
    Driver name   : uvcvideo
    Card type     : EasyCamera: EasyCamera
    Bus info      : usb-0000:00:14.0-1
    Driver version: 4.14.15
    Capabilities  : 0x84200001
        Video Capture
        Streaming
        Extended Pix Format
        Device Capabilities
    Device Caps   : 0x04200001
        Video Capture
        Streaming
        Extended Pix Format
Priority: 2
Video input : 0 (Camera 1: ok)
Format Video Capture:
    Width/Height      : 1280/720
    Pixel Format      : 'MJPG'
    Field             : None
    Bytes per Line    : 0
    Size Image        : 1843200
    Colorspace        : sRGB
    Transfer Function : Default
    YCbCr/HSV Encoding: Default
    Quantization      : Default
    Flags             :
Crop Capability Video Capture:
    Bounds      : Left 0, Top 0, Width 1280, Height 720
    Default     : Left 0, Top 0, Width 1280, Height 720
    Pixel Aspect: 1/1
Selection: crop_default, Left 0, Top 0, Width 1280, Height 720
Selection: crop_bounds, Left 0, Top 0, Width 1280, Height 720
Streaming Parameters Video Capture:
    Capabilities     : timeperframe
    Frames per second: 30.000 (30/1)
    Read buffers     : 0
                     brightness (int)    : min=0 max=100 step=1 default=50
value=50
                       contrast (int)    : min=0 max=100 step=1 default=50
value=50
                     saturation (int)    : min=0 max=100 step=1 default=50
value=50
                            hue (int)    : min=0 max=100 step=1 default=50
value=50
 white_balance_temperature_auto (bool)   : default=1 value=1
                          gamma (int)    : min=0 max=100 step=1 default=50
value=50
           power_line_frequency (menu)   : min=0 max=2 default=1 value=2
      white_balance_temperature (int)    : min=2500 max=6500 step=10
default=4500 value=4500 flags=inactive
                      sharpness (int)    : min=0 max=100 step=1 default=50
value=50
         exposure_auto_priority (bool)   : default=0 value=1
ioctl: VIDIOC_ENUM_FMT
    Index       : 0
    Type        : Video Capture
    Pixel Format: 'MJPG' (compressed)
    Name        : Motion-JPEG

    Index       : 1
    Type        : Video Capture
    Pixel Format: 'YUYV'
    Name        : YUYV 4:2:2


~> v4l2-ctl --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
    Index       : 0
    Type        : Video Capture
    Pixel Format: 'MJPG' (compressed)
    Name        : Motion-JPEG
        Size: Discrete 1280x720
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 160x120
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 320x180
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 320x240
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 424x240
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 640x360
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 640x480
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 848x480
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 960x540
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 1280x720
            Interval: Discrete 0.033s (30.000 fps)

    Index       : 1
    Type        : Video Capture
    Pixel Format: 'YUYV'
    Name        : YUYV 4:2:2
        Size: Discrete 1280x720
            Interval: Discrete 0.100s (10.000 fps)
        Size: Discrete 160x120
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 320x180
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 320x240
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 424x240
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 640x360
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 640x480
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 848x480
            Interval: Discrete 0.067s (15.000 fps)
        Size: Discrete 960x540
            Interval: Discrete 0.067s (15.000 fps)
        Size: Discrete 1280x720
            Interval: Discrete 0.100s (10.000 fps)