rpiCamera: selected camera is not available

[JiningLiu]

Which version are you using?

v1.9.0

Which operating system are you using?

• Linux amd64 standard
• Linux amd64 Docker
• Linux arm64 standard
• Linux arm64 Docker
• Linux arm7 standard
• Linux arm7 Docker
• Linux arm6 standard
• Linux arm6 Docker
• Windows amd64 standard
• Windows amd64 Docker (WSL backend)
• macOS amd64 standard
• macOS amd64 Docker
• Other (please describe)

Describe the issue

When using the path configuration described in the section below, running mediamtx results in the following error:
ERR [path cam] [RPI Camera source] camera_create(): selected camera is not available

This happens in both regular and docker environments. Device is Raspberry Pi 5 4GB with Camera Module 3, libcamera-hello works perfectly fine.

Unsure if related to #3714.

Describe how to replicate the issue

1. Use the following path configuration (or use the provided docker command in README):

paths:
  cam:
    source: rpiCamera

2. Start the server

Did you attach the server logs?

log.txt

Did you attach a network dump?

No

[ViktorFairuschin]

Got the same issue!

[aler9]

Hello, thanks for providing logs, in which this line is visible

vc4.cpp:188 Unable to acquire a Unicam instance

Digging into libcamera issues, it turns out that that warning is triggered when libcamera is compiled without PISP support (Raspberry Image Signal Processor): raspberrypi/libcamera#145

The libcamera bundled into the server is indeed compiled without PIPS. Therefore, we'll change bundled libcamera in order to enable PISP.

[aler9]

please test this nightly release and let me know if it fixes the issue (click on "artifacts", "binaries"):

https://github.com/bluenviron/mediamtx/actions/runs/10734526077

[dgo19]

Hello,
thank you for the nightly build. I have the same issue and tried the nightly build including the fix. It's not working, here is the debug log:

Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.850261028] [2663] DEBUG IPAModule ipa_module.cpp:334 ipa_rpi_pisp.so: IPA module ./ipa_module/ipa_rpi_pisp.so is signed
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.850359750] [2663] DEBUG IPAManager ipa_manager.cpp:245 Loaded IPA module './ipa_module/ipa_rpi_pisp.so'
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.850447491] [2663] DEBUG IPAModule ipa_module.cpp:334 ipa_rpi_vc4.so: IPA module ./ipa_module/ipa_rpi_vc4.so is signed
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.850470251] [2663] DEBUG IPAManager ipa_manager.cpp:245 Loaded IPA module './ipa_module/ipa_rpi_vc4.so'
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.850512640] [2663]  INFO Camera camera_manager.cpp:313 libcamera v0.3.0+65-6ddd79b5-dirty (2024-09-06T07:29:55+00:00)
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.850644010] [2664] DEBUG Camera camera_manager.cpp:69 Starting camera manager
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.850800029] [2664] DEBUG DeviceEnumerator device_enumerator.cpp:230 New media device "rp1-cfe" created from /dev/media2
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851106400] [2664] DEBUG DeviceEnumerator device_enumerator.cpp:258 Added device /dev/media2: rp1-cfe
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851164363] [2664] DEBUG DeviceEnumerator device_enumerator.cpp:230 New media device "pispbe" created from /dev/media0
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851329215] [2664] DEBUG DeviceEnumerator device_enumerator.cpp:258 Added device /dev/media0: pispbe
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851355364] [2664] DEBUG DeviceEnumerator device_enumerator.cpp:230 New media device "rpivid" created from /dev/media3
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851395938] [2664] DEBUG DeviceEnumerator device_enumerator.cpp:258 Added device /dev/media3: rpivid
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851436253] [2664] DEBUG DeviceEnumerator device_enumerator.cpp:230 New media device "pispbe" created from /dev/media1
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851588679] [2664] DEBUG DeviceEnumerator device_enumerator.cpp:258 Added device /dev/media1: pispbe
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851603290] [2664] DEBUG Camera camera_manager.cpp:134 Found registered pipeline handler 'rpi/vc4'
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851635623] [2664] DEBUG RPI vc4.cpp:188 Unable to acquire a Unicam instance
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851643457] [2664] DEBUG RPI vc4.cpp:188 Unable to acquire a Unicam instance
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851652901] [2664] DEBUG Camera camera_manager.cpp:134 Found registered pipeline handler 'rpi/pisp'
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851664346] [2664] DEBUG DeviceEnumerator device_enumerator.cpp:318 Successful match for media device "rp1-cfe"
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851678457] [2664] DEBUG DeviceEnumerator device_enumerator.cpp:318 Successful match for media device "pispbe"
Sep 06 10:22:00 rpi5c mediamtx[2663]: [0:14:33.851709605] [2664]  INFO RPI pisp.cpp:695 libpisp version v1.0.6 b567f0455680 06-09-2024 (07:15:51)
Sep 06 10:22:00 rpi5c mediamtx[2663]: terminate called after throwing an instance of 'std::runtime_error'
Sep 06 10:22:00 rpi5c mediamtx[2663]:   what():  BE: Could not find config json file: /share/libpisp/backend_default_config.json
Sep 06 10:22:00 rpi5c mediamtx[2649]: 2024/09/06 10:22:00 ERR [path cam] [RPI Camera source] process exited unexpectedly: signal: aborted

I tried creating directories and a symlink with that file:

mkdir -p /share/libpisp
ln -s /usr/share/libpisp/backend_default_config.json /share/libpisp/backend_default_config.json

It works with that modification. Hope this helps.

Kind Regards, Daniel

[aler9]

@dgo19 thanks for the feedback, try again with this different nightly release:

https://github.com/bluenviron/mediamtx/actions/runs/10739500678

[dgo19]

Yes, this build works for me. Thank you!

[ViktorFairuschin]

Also works for me, thanks!

[github-actions]

This issue is mentioned in release v1.9.1 🚀
Check out the entire changelog by clicking here