Preview not shown on StarBook Mk V, but photos are still taken #198
Description
What Happened?
On my StarBook Mk V, the camera app shows a black preview and the hardware camera light does not turn on. When taking a photo, the light turns on briefly and a photo is saved, but no preview is ever shown.
Tested with both the latest release as a Flatpak and then master built and running natively.
Could be the same root cause as #149 and elementary/triage#794.
Before 62cf2ac there is still no preview, but no photo is taken (a 0-byte file is saved)
Steps to Reproduce
- Have a StarBook Mk V (good luck, though testing on other hardware is helpful)
- Open Camera
- See no preview
- Take a photo
- See the photo is saved
Expected Behavior
The preview should show up, especially since we're able to access the camera some how when actually taking the photo. If we can't access it for some reason, we should show a more helpful error than a black screen.
OS Version
6.x (Odin)
Software Version
Compiled from git
Log Output
No response
Hardware Info
There is only one camera (not two, and not an IR camera or anything). I don't know what all this means but hopefully it may be helpful to someone. 😄
$ v4l2-ctl --list-devices
USB 2.0 Camera: USB Camera (usb-0000:00:14.0-4):
/dev/video0
/dev/video1
$ ll /dev/video*
crw-rw----+ 1 root video 81, 0 Dec 3 10:07 /dev/video0
crw-rw----+ 1 root video 81, 1 Dec 3 10:07 /dev/video1
$ v4l2-ctl -d /dev/video0 --all
Driver Info:
Driver name : uvcvideo
Card type : USB 2.0 Camera: USB Camera
Bus info : usb-0000:00:14.0-4
Driver version : 5.11.22
Capabilities : 0x84a00001
Video Capture
Metadata 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' (Motion-JPEG)
Field : None
Bytes per Line : 0
Size Image : 1843789
Colorspace : sRGB
Transfer Function : Rec. 709
YCbCr/HSV Encoding: ITU-R 601
Quantization : Default (maps to Full Range)
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 Video Capture: crop_default, Left 0, Top 0, Width 1280, Height 720, Flags:
Selection Video Capture: crop_bounds, Left 0, Top 0, Width 1280, Height 720, Flags:
Streaming Parameters Video Capture:
Capabilities : timeperframe
Frames per second: 30.000 (30/1)
Read buffers : 0
brightness 0x00980900 (int) : min=-64 max=64 step=1 default=18 value=18
contrast 0x00980901 (int) : min=0 max=64 step=1 default=32 value=32
saturation 0x00980902 (int) : min=0 max=128 step=1 default=51 value=51
hue 0x00980903 (int) : min=-40 max=40 step=1 default=0 value=0
white_balance_temperature_auto 0x0098090c (bool) : default=1 value=1
gamma 0x00980910 (int) : min=72 max=500 step=1 default=100 value=100
gain 0x00980913 (int) : min=0 max=100 step=1 default=7 value=7
power_line_frequency 0x00980918 (menu) : min=0 max=2 default=1 value=1
0: Disabled
1: 50 Hz
2: 60 Hz
white_balance_temperature 0x0098091a (int) : min=2800 max=6500 step=1 default=4600 value=4600 flags=inactive
sharpness 0x0098091b (int) : min=0 max=8 step=1 default=5 value=5
backlight_compensation 0x0098091c (int) : min=0 max=2 step=1 default=1 value=1
exposure_auto 0x009a0901 (menu) : min=0 max=3 default=3 value=3
1: Manual Mode
3: Aperture Priority Mode
exposure_absolute 0x009a0902 (int) : min=1 max=5000 step=1 default=157 value=157 flags=inactive
exposure_auto_priority 0x009a0903 (bool) : default=0 value=1
$ v4l2-ctl -d /dev/video1 --all
Driver Info:
Driver name : uvcvideo
Card type : USB 2.0 Camera: USB Camera
Bus info : usb-0000:00:14.0-4
Driver version : 5.11.22
Capabilities : 0x84a00001
Video Capture
Metadata Capture
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x04a00000
Metadata Capture
Streaming
Extended Pix Format
Priority: 2
Format Metadata Capture:
Sample Format : 'UVCH' (UVC Payload Header Metadata)
Buffer Size : 1024
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