usb camera does not work RPI4

[kiai72]

usb camera (rpi4) isn't working. Is this a known issue ?

[rsglobal]

Thanks for reporting, i'll check it.
Could you update issue description accordingly?

For me it works, just do not use the open camera app already installed. That's OK for the CSI camera, but for the USB camera install some other apk it's possible to find for free on web

[kiai72]

can you please check if it works for you in a browser (chrome dev or firefox) ? https://webcamtests.com/

one more question: did you try 0.5.1 or 0.6.1 ? (me: 0.6.1)

I've just tried v0.6.1 and in the browser does not work

[kiai72]

ok,
my main-usage for android is: i want to do jitsi, zoom and skype.
jitsi works fine in raspberryOS - in the browser.
But zoom hardly works - and skype not at all. Not even in the browser -> that's why i wanted to have the camera running in browser.
But if it works in zoom app and skype app - that would be fine as well. (do you know ?)

No idea if Zoom and Skype are available, I do not see them in Aurora Store but I feel they are quite heavy as apps...

[kiai72]

i tried skype lite (install apk). I can use skype - but my camera picture is not captured and shown to the other participants.

Quick update about this issue using the new version based on Android 12. Skype is now available as apk but USB camera is not detected by it. On the opposite CSI Rpi Camera yes, but the image gets completely messed up.

[kiai72]

thank you for keeping me updated. I hope USB-cameras will be supported in future.

[KonstaT]

I got myself a HDMI-USB video capture device as I didn't need another USB webcam (one I have doesn't support MJPG). Someone recommended it because it uses MJPG and it's still basically an UVC webcam so it can be used with the external camera HAL.

I had two errors with minigbm gralloc.

One with starting the camera preview:

E [minigbm:CrosGralloc4Allocator.cc(52)]: Unsupported combination -- pixel format: YV12, drm format:DRM_FOURCC_9997, usage: CPU_READ_NEVER | CPU_WRITE_NEVER | CPU_WRITE_RARELY | CPU_WRITE_OFTEN | GPU_TEXTURE | CAMERA_OUTPUT (0x20130)

And another one when capturing an image:

E [minigbm:CrosGralloc4Allocator.cc(52)]: Unsupported combination -- pixel format: BLOB, drm format:DRM_FOURCC_R8  , usage: CPU_READ_NEVER | CPU_READ_RARELY | CPU_READ_OFTEN | CPU_WRITE_NEVER | CPU_WRITE_RARELY | CPU_WRITE_OFTEN | CAMERA_OUTPUT (0x20033)

Added this: lineage-rpi/android_external_minigbm@f9d7925
Preview, photos, and recording videos work fine after that and doesn't seem it broke anything with Pi camera modules or hw video dec. Only "issue" is that camera preview is vertically mirrored (selfie mirror effect?) but only on the camcorder preview. :o

@rsglobal
Does that look sane to you?

[rsglobal]

@KonstaT

Does that look sane to you?

More than. Thank you. Will add this to the my minigbm fork as well.

[kiai72]

nice! will this be implemented in GloDroid and/or konstagang's rom soon ?

[rsglobal]

Unfortunately both of my cameras don't expose V4L2_CAP_VIDEO_CAPTURE , therefore can't be used with external camera HAL (at least without modification of the HAL).
https://cs.android.com/android/platform/superproject/+/master:hardware/interfaces/camera/provider/2.4/default/ExternalCameraProviderImpl_2_4.cpp;l=247;drc=34cdbcde5096aa8d822626d953f9a493a6fa835f

[KonstaT]

nice! will this be implemented in GloDroid and/or konstagang's rom soon ?

It's already in my latest LineageOS 19 build and I see Roman added a similar thing on GloDroid. But as you can see from the comments it's likely that there's more UVC webcams that won't work for various reasons than ones that do.

Unfortunately both of my cameras don't expose V4L2_CAP_VIDEO_CAPTURE

I guess getting that HDMI-USB video capture card was a good suggestion that was made to me.