MSGID: <10f9p1p$3fe99$1@dont-email.me> 4df44a52   
   REPLY: <10f60co$2ieam$1@dont-email.me> d5e839ff   
   PID: PyGate 1.5   
   TID: PyGate/Linux 1.5   
   CHRS: CP437 2   
   TZUTC: 0000   
   REPLYADDR daniel@me.invalid   
   REPLYTO 3:633/10 UUCP   
   On 14/11/2025 01:24, The Natural Philosopher wrote:   
   > I wonder if cheese exists for RPi - that was always my default webcam    
   > tester/ Looks like it does   
      
   Yes, cheese is just an "apt install" away.   
      
   I had a spare moment and a spare webcam and a Pi 3b that wasn't doing    
   anything so I plugged the webcam into the Pi and installed cheese ...   
      
   ... the camera was recognized straight away, but I did not get a    
   picture. cheese displayed "There was an error playing video from the    
   webcam".   
      
   So I tried the camera on my big AMD64 box (which already has the same    
   model of webcam installed) and cheese recognized both and let me switch    
   between them and display an image from either.   
      
   So I went back to the Pi. I tried changing resolutions with no joy. I    
   tried changing source to one of the (non-existent) Pi camera sources and    
   back. No joy.   
      
   I tried running cheese in a terminal and got:   
      
   -----   
   $ cheese   
      
   (cheese:1798): Cogl-WARNING **: 11:05:55.858:    
   driver/gl/gl/cogl-texture-driver-gl.c:453: GL error (1281): Invalid value   
      
      
   (cheese:1798): Cogl-WARNING **: 11:05:55.858:    
   driver/gl/gl/cogl-texture-driver-gl.c:457: GL error (1281): Invalid value   
      
      
   (org.gnome.Cheese:1798): cheese-CRITICAL **: 11:05:56.658: GValue type    
   gint x GstValueList, cannot be handled for resolution   
      
   (org.gnome.Cheese:1798): cheese-CRITICAL **: 11:05:56.659: GValue type    
   gint x GstValueList, cannot be handled for resolution   
      
   (org.gnome.Cheese:1798): cheese-WARNING **: 11:05:58.128: Internal data    
   stream error.: ../libs/gst/base/gstbasesrc.c(3187): gst_base_src_loop    
   ():    
   /GstCameraBin:camerabin/GstWrapperCameraBinSrc:camera_source/Gst   
   in:bin28/GstV4l2Src:v4l2src1:   
   streaming stopped, reason not-negotiated (-4)   
   -----   
      
   None of which meant anything much to me.   
      
   I then tried vlc (again, in the terminal). Opened a capture device,    
   (mode Video camera, device name /dev/video0) and got a VERY slow video    
   of myself. I should think the frame rate was about 4fps ... but the    
   camera was definitely working.   
      
   vlc produced one message in the terminal window that looks interesting:   
      
   [0000007f70028fb0] main decoder error: buffer deadlock prevented   
      
   The camera is one I bought from the Raspberry Pi store in Cambridge for    
   about œ25 three or four years ago. It is an "A4TECH PK-910H 1080P    
   Full-HD WebCam". The one on my AMD64 box came from Pi Hut (during Covid,    
   when you couldn't get webcams from the usual suspects even for silly    
   money), they have it online for œ32 today.   
      
   Why it doesn't work with cheese on the Pi I can't say, though maybe the    
   buffer deadlock message from vlc contains a clue that cheese isn't doing    
   something necessary that vlc is?   
      
   --    
   Cheers,   
     Daniel.   
      
   --- PyGate Linux v1.5   
    * Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)   
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