rpiCamera: selected camera is not available

[b23prodtm]

bluenviron/mediamtx#3715

need to fix it with new mediamtx binary

[b23prodtm]

webcam 2024/11/24 23:16:24 ERR [path cam] [RPI Camera source] write /dev/shm/mediamtx-rpicamera-1732490184528493204/ipa_conf/rpi/pisp/imx219.json: no space left on device

[b23prodtm]

Setting SHM_SIZE=10G fix issue of available space, in the above comment.

But the selected camera's still not available:
Actually a bug in the mediamtx binary causes thee error with raspberrypi camera module use

[b23prodtm]

 webcam  2024/12/08 11:47:18 INF [RTSP] [conn 127.0.0.1:56180] opened
 webcam  2024/12/08 11:47:19 INF [RTSP] [conn 127.0.0.1:56180] closed: no one is publishing to path 'cam'
 webcam  Input #0, video4linux2,v4l2, from '/dev/video0':
 webcam    Duration: N/A, start: 100359.982244, bitrate: N/A
 webcam      Stream #0:0: Video: mjpeg (Baseline), yuvj422p(pc, bt470bg/unknown/unknown), 640x480, 12 tbr, 1000k tbn, 1000k tbc
 webcam  Stream mapping:
 webcam    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
 webcam  Press [q] to stop, [?] for help
 webcam  [libx264 @ 0x55bac2d830] using cpu capabilities: ARMv8 NEON
 webcam  [libx264 @ 0x55bac2d830] profile High 4:2:2, level 2.2, 4:2:2, 8-bit
 webcam  [libx264 @ 0x55bac2d830] 264 - core 160 r3011 cde9a93 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=60 keyint_min=6 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
 webcam  2024/12/08 11:47:20 INF [RTSP] [conn 127.0.0.1:64878] opened
 webcam  2024/12/08 11:47:20 INF [RTSP] [session d72e9b05] created by 127.0.0.1:64878
 webcam  [rtsp @ 0x55bac2b300] method SETUP failed: 461 Unsupported Transport
 webcam  2024/12/08 11:47:20 INF [RTSP] [session d72e9b05] is publishing to path 'webcam', 1 track (H264)
 webcam  Output #0, rtsp, to 'rtsp://127.0.0.1:8554/webcam':
 webcam    Metadata:
 webcam      encoder         : Lavf58.45.100
 webcam      Stream #0:0: Video: h264 (libx264), yuvj422p(pc), 640x480, q=-1--1, 12 fps, 90k tbn, 12 tbc
 webcam      Metadata:
 webcam        encoder         : Lavc58.91.100 libx264
 webcam      Side data:
 webcam        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
 webcam  frame=    2 fps=1.7 q=0.0 size=N/A time=00:00:00.00 frame=   16 fps=9.3 q=22.0 size=N/A time=00:00:00.66 bitrate=[27:52:44.084770156] [37]  INFO Camera camera_manager.cpp:325 libcamera v0.3.2+27-7330f29b-dirty (2024-12-02T23:04:17UTC)
 webcam  frame=   51 fps= 23 q=22.0 size=N/A time=00:00:03.582024/12/08 11:47:21 ERR [path cam] [RPI Camera source] camera_create(): selected camera is not available
 webcam  frame=   57 fps= 21 q=22.0 size=N/A time=00:00:04.08frame=   63 fps= 19 q=18.0 size=N/A time=00:00:04.58 bitrate=frame=   70 fps= 19 q=22.0 size=N/A time=00:00:05.16 bitrate=2024/12/08 11:47:23 INF [RTSP] [conn 127.0.0.1:64884] opened
 webcam  2024/12/08 11:47:23 INF [RTSP] [conn 127.0.0.1:64884] closed: no one is publishing to path 'cam'
 webcam  frame=   76 fps= 18 q=22.0 size=N/A time=00:00:05.66frame=   82 fps= 17 q=22.0 size=N/A time=00:00:06.16 bitrate=frame=   88 fps= 17 q=23.0 size=N/A time=00:00:06.66 bitrate=frame=   94 fps= 16 q=22.0 size=N/A time=00:00:07.16 bitrate=frame=  100 fps= 16 q=22.0 size=N/A time=00:00:07.66 bitrate=frame=  106 fps= 16 q=22.0 size=N/A time=00:00:08.16 bitrate=2024/12/08 11:47:26 INF [RTSP] [conn 127.0.0.1:64894] opened
 webcam  2024/12/08 11:47:26 INF [RTSP] [conn 127.0.0.1:64894] closed: no one is publishing to path 'cam'
 webcam  frame=  112 fps= 15 q=22.0 size=N/A time=00:00:08.66frame=  118 fps= 15 q=22.0 size=N/A time=00:00:09.16 bitrate=frame=  124 fps= 15 q=23.0 size=N/A time=00:00:09.66 bitrate=frame=  130 fps= 15 q=22.0 size=N/A time=00:00:10.16 bitrate=frame=  136 fps= 15 q=22.0 size=N/A time=00:00:10.66 bitrate=frame=  142 fps= 14 q=22.0 size=N/A time=00:00:11.16 bitrate=frame=  149 fps= 14 q=22.0 size=N/A time=00:00:11.75 bitrate=frame=  155 fps= 14 q=22.0 size=N/A time=00:00:12.25 bitrate=frame=  161 fps= 14 q=22.0 size=N/A time=00:00:12.75 bitrate=2024/12/08 11:47:31 INF [RTSP] [conn 127.0.0.1:65500] opened
 webcam  frame=  167 fps= 14 q=22.0 size=N/A time=00:00:13.252024/12/08 11:47:31 INF [RTSP] [conn 127.0.0.1:65500] closed: no one is publishing to path 'cam'
 webcam  [27:52:54.320206514] [41]  INFO Camera camera_manager.cpp:325 libcamera v0.3.2+27-7330f29b-dirty (2024-12-02T23:04:17UTC)
 webcam  frame=  173 fps= 14 q=22.0 size=N/A time=00:00:13.752024/12/08 11:47:32 ERR [path cam] [RPI Camera source] camera_create(): selected camera is not available
2024/12/08 11:47:35 INF [RTSP] [conn 127.0.0.1:65516] opened=N/A dup=7 drop=0 speed=1.08x    1.11x  

[b23prodtm]

This screenshot was taken using an usb Microsoft Video Camera

MTX_PATH: webcam as defined in YAML RTSP-configuration

Send the command to the webcam container ./config_mtx.sh webcam to switch to USB video

And the stream can be read as rtsp://127.0.0.1:8554/webcam or anything else for the host IP