HKCam only works with FFmpeg command via ssh about hkcam

[robin-siegl]

I got the same issue. Video not showing in the home app from apple.
The commands you wrote doesn't work for me as workaround.

[PvdGulik]

Do you get errors when you give the command ffmpeg -f v4l2 -i /dev/video0 -vf format=yuv420p -f v4l2 /dev/video1

With a other Webcam I don't need to give the specific command with -vf format=yuv420p, but the standard command works ffmpeg -f v4l2 -i /dev/video0 -codec:v copy -f v4l2 /dev/video1

But at the end, I always have to start the FFmpeg-command to get it working. Don't no why?

[robin-siegl]

No, didn't get any errors. I don't know if this is issue on my side, i already tried different homekit camera solutions. I always get the issue where the camera can't get a connection.

[PvdGulik]

I found a better solution: use in front of FFmpeg the following LD_PRELOAD=/usr/lib/arm-linux-gnueabihf/libv4l/v4l1compat.so

So resulting in LD_PRELOAD=/usr/lib/arm-linux-gnueabihf/libv4l/v4l1compat.so ffmpeg -f v4l2 -i /dev/video0 -codec:v copy -f v4l2 /dev/video1

Now only, how do I tell HKCAM to start with this?

[PvdGulik]

I’m sure there must be something wrong with the ffmpeg command which HKCam generates:

When I start the command as I mentioned before, ffmpeg -f v4l2 -i /dev/video0 -codec:v copy -f v4l2 /dev/video1 , I don’t get errors.

When HKCam is running and I open in the Homekit-app the camera, I get these logging errors.

But when HKCam is running and I give the command, ffmpeg -f v4l2 -i /dev/video0 -codec:v copy -f v4l2 /dev/video1, the streaming starts in the Homekit App.

So I’m searching where the command is build. What I see in the logging is: /usr/bin/ffmpeg [ffmpeg -f v4l2 -i /dev/video0 -codec:v copy -f v4l2 /dev/video1]
I think it should be: /usr/bin/ffmpeg [-f v4l2 -i /dev/video0 -codec:v copy -f v4l2 /dev/video1], so without the second ffmeg

What do you think?

[PvdGulik]

Solved, I'll publish a install instruction for Buster