device/camera/camera_decoder.c: CAMERA: Cannot find 'MJPG' decoder

[jattie-ire]

Hi Kamil,

I am working on the migration process for Octoprint to camera-streamer as the defacto standard, implementing that as a Linuc container using LXC.

• I am running in a Linux container(LXC)
• I am running on Ubuntu 22.04 LTS
• I could not install liblivemedia-dev, not sure how to resolve it and if it is only relevant to raspberry Pi hardware.
• The build steps went fine, and I can build the streamer

It just fails at running and I have been at it for days now, so was hoping to get some guidance.

root@ustream:~/camera-streamer# ./camera-streamer 
util/opts/opts.c: ?: Usage of '-camera-list_options' is deprecated change to '--camera-list_options'.
./camera-streamer Version: v0.1-23-gf0634f9 (f0634f9)
device/v4l2/device.c: CAMERA: Device path=/dev/video0 fd=3 opened
device/v4l2/device_options.c: CAMERA: The 'horizontal_flip=0' was failed to find.
device/v4l2/device_options.c: CAMERA: The 'vertical_flip=0' was failed to find.
device/camera/camera_input.c: CAMERA: Disabling DMA since device uses USB (which is likely not working properly).
device/v4l2/buffer_list.c: CAMERA:capture: Requested resolution=1920x1080 is unavailable. Got 1280x720. Accepted
device/buffer_list.c: CAMERA:capture: Using: 1280x720/MJPG, buffers=3, bytesperline=0, sizeimage=1.8MiB
device/buffer_list.c: CAMERA:capture: Opened 3 buffers. Memory used: 5.3 MiB
device/camera/camera_decoder.c: CAMERA: Cannot find 'MJPG' decoder
device/camera/camera_output.c: CAMERA: Cannot find source for 'VIDEO' for one of the formats 'H264'.

Is my issue related to this missing component liblivemedia-dev or do I just miss some basic options passed in?

Thanks

Jattie

[ayufan]

@jattie-ire Is this RPI?

[jattie-ire]

No, it's a Linux PC

[ayufan]

@jattie-ire Currently the application will try to run and decode MJPG to re-encode it into H264. Since there's no HW decoder you have to run it with: --camera-video.disabled. Only MJPG stream will be available then.

This is one of the cases where It is rough on edges outside of RPI platform currently.

[jattie-ire]

Hi Kamil, I just want to use the same streamer to allow me to be compatible and portable for pi support, so will try to get it working with the disabled flag now.

[ayufan]

The disabled will make it work, as this is something that I tested on other platforms.

[jattie-ire]

It does indeed, thanks for the help.

root@ustream:~/camera-streamer# ./camera-streamer --camera-video.disabled
./camera-streamer Version: v0.1-23-gf0634f9 (f0634f9)
device/v4l2/device.c: CAMERA: Device path=/dev/video0 fd=14 opened
device/v4l2/device_options.c: CAMERA: The 'horizontal_flip=0' was failed to find.
device/v4l2/device_options.c: CAMERA: The 'vertical_flip=0' was failed to find.
device/camera/camera_input.c: CAMERA: Disabling DMA since device uses USB (which is likely not working properly).
device/v4l2/buffer_list.c: CAMERA:capture: Requested resolution=1920x1080 is unavailable. Got 1280x720. Accepted
device/buffer_list.c: CAMERA:capture: Using: 1280x720/MJPG, buffers=3, bytesperline=0, sizeimage=1.8MiB
device/buffer_list.c: CAMERA:capture: Opened 3 buffers. Memory used: 5.3 MiB
device/device.c: CAMERA: Setting frame interval_us=0 for FPS=30
device/v4l2/device_options.c: CAMERA: The 'AfTrigger=1' was failed to find.
device/links.c: ?: Link 0: CAMERA:capture[1280x720/MJPG/3] => [SNAPSHOT-CAPTURE, STREAM-CAPTURE]
device/buffer_list.c: CAMERA:capture: Streaming started... Was 0 of 3 enqueud

[ayufan]

Glad that I could help.