Re: USB camera has "no usable YUV encodings"
On Aug 23 15:56:00, s...@spacehopper.org wrote: > On 2019-08-23, Jan Stary wrote: > > This is current/amd64 on a Dell Latitude E5570 (dmesg below). > > I am trying to use a USB camera (bought with a microscope, > > to display the miracles of paramecium life on the laptop). > > > > https://www.bresser.de/en/Astronomy/Accessories/BRESSER-MikrOkular-Full-HD-eyepiece-camera.html > > > > uvideo1 at uhub0 port 1 configuration 1 interface 0 "Alcor Micro > > MikrOkularHD" rev 2.00/0.00 addr 4 > > video1 at uvideo1 > > > > While video(1) works with the laptop's integrated camera (video0), > > it doesn't work with this USB camera (video1): > > > > $ doas video -f /dev/video1 -v > > doas (h...@dell.stare.cz) password: > > video: /dev/video1 has no usable YUV encodings > > > > The device itself works, in that "doas cat /dev/video1 > /tmp/video.raw" > > spews out data, presumably frames captured by the camera. I can even > > play that back with "video -i /tmp/video.raw", but it's garbage, > > not being in one of the "YUV encodings". file(1) says > > > > /tmp/video.raw: JPEG image data, JFIF standard 1.01, > > baseline, precision 0, 4360x720 > > > > so is it some format based on a sequence of jpges? > > (Please excuse my video ignorance.) > > MJPEG? that's possible. > > Try some of these: Trying again after an upgrade > ffplay -f video4linux2 /dev/video0 works, i.e. displays a 640x480 window of what the camera sees, and says Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 1590871894.699098, bitrate: N/A Stream #0:0: Video: mjpeg (Baseline), yuvj422p(pc, bt470bg/unknown/unknown), 640x480 [SAR 1:1 DAR 4:3], 30 fps, 30 tbr, 1000k tbn, 1000k tbc > mplayer tv:// works, and says Playing tv://. TV file format detected. Selected driver: v4l2 name: Video 4 Linux 2 input author: Martin Olschewski comment: first try, more to come ;-) v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead. Selected device: MikrOkularHD Capabilities: video capture read/write streaming supported norms: inputs: 0 = Camera Terminal; Current input: 0 Current format: MJPEG v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument tv.c: norm_from_string(pal): Bogus norm parameter, setting default. v4l2: ioctl enum norm failed: Inappropriate ioctl for device Error: Cannot set norm! Selected input hasn't got a tuner! v4l2: ioctl set mute failed: Invalid argument == Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family libavcodec version 58.54.100 (external) Selected video codec: [ffmjpeg] vfm: ffmpeg (FFmpeg MJPEG) == Audio: no sound Starting playback... Could not find matching colorspace - retrying with -vf scale... Opening video filter: [scale] Movie-Aspect is undefined - no prescaling applied. [swscaler @ 0x26c8b018]bicubic scaler, from yuv422p to yuyv422 using MMXEXT [swscaler @ 0x26c8b018]using unscaled yuv422p -> yuyv422 special converter VO: [xv] 640x480 => 640x480 Packed YUY2 [fs] Movie-Aspect is 1.33:1 - prescaling to correct movie aspect. VO: [xv] 640x480 => 640x480 Packed YUY2 [fs] V: 0.0 22/ 22 ??% ??% ??,?% 0 0 J v4l2: ioctl set mute failed: Invalid argument I don't know what the VIDIOC_G_STD ioctl is and if there is anything being missed using VIDIOC_G_PARM instead. > mpv tv:// No protocol handler found to open URL tv:// The protocol is either unsupported, or was disabled at compile-time. Exiting... (Errors when loading file) > If you want to record, and ffplay works, > you should at least be able to use ffmpeg > and write a file with a standard container format. Yes. Thanks again for the tips. To understand the original problem: video(1) supports certain encodings, namely uyvy, yuy2 and yv12; the mjpeg encoding this camera is using just isn't one of those. That's what the USB camera has no usable YUV encodings error message means, right? So my original problem is not with the camera, it's just that video(1) does not support its emcoding. (Luckily, ffplay etc, being more fully-fledged video programs, do support mjpeg.) Jan
Re: USB camera has "no usable YUV encodings"
On Aug 23 10:49:41, h...@stare.cz wrote: > This is current/amd64 on a Dell Latitude E5570 (dmesg below). > I am trying to use a USB camera (bought with a microscope, > to display the miracles of paramecium life on the laptop). > > https://www.bresser.de/en/Astronomy/Accessories/BRESSER-MikrOkular-Full-HD-eyepiece-camera.html > > uvideo1 at uhub0 port 1 configuration 1 interface 0 "Alcor Micro > MikrOkularHD" rev 2.00/0.00 addr 4 > video1 at uvideo1 For the archives, this is the USB camera ataching with UVIDEO_DEBUG. In particular, the format seems to be MJPEG as Stuart suggested. Jan May 30 14:00:21 mb32 /bsd: uvideo1 at uhub0 port 3 configuration 1 interface 0 "Alcor Micro MikrOkularHD" rev 2.00/0.00 addr 3 May 30 14:00:21 mb32 /bsd: bLength=9 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x02 (UDESC_CONFIG) May 30 14:00:21 mb32 /bsd: | May 30 14:00:21 mb32 /bsd: bLength=9 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x02 May 30 14:00:21 mb32 /bsd: wTotalLength=311 May 30 14:00:21 mb32 /bsd: bNumInterface=0x02 May 30 14:00:21 mb32 /bsd: bConfigurationValue=0x01 May 30 14:00:21 mb32 /bsd: iConfiguration=0x00 May 30 14:00:21 mb32 /bsd: bmAttributes=0x80 May 30 14:00:21 mb32 /bsd: bMaxPower=0x64 May 30 14:00:21 mb32 /bsd: bMaxPower=0x64 May 30 14:00:21 mb32 /bsd: bLength=8 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x0b (UDESC_IFACE_ASSOC) May 30 14:00:21 mb32 /bsd: | May 30 14:00:21 mb32 /bsd: bLength=8 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x0b May 30 14:00:21 mb32 /bsd: bFirstInterface=0x00 May 30 14:00:21 mb32 /bsd: bInterfaceCount=2 May 30 14:00:21 mb32 /bsd: bFunctionClass=0x0e May 30 14:00:21 mb32 /bsd: bFunctionSubClass=0x03 May 30 14:00:21 mb32 /bsd: bFunctionProtocol=0x00 May 30 14:00:21 mb32 /bsd: iFunction=0x04 May 30 14:00:21 mb32 /bsd: iFunction=0x04 May 30 14:00:21 mb32 /bsd: bLength=9 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x04 (UDESC_INTERFACE) May 30 14:00:21 mb32 /bsd: | May 30 14:00:21 mb32 /bsd: bLength=9 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x04 May 30 14:00:21 mb32 /bsd: bInterfaceNumber=0x00 May 30 14:00:21 mb32 /bsd: bAlternateSetting=0x00 May 30 14:00:21 mb32 /bsd: bNumEndpoints=1 May 30 14:00:21 mb32 /bsd: bInterfaceClass=0x0e May 30 14:00:21 mb32 /bsd: bInterfaceSubClass=0x01 May 30 14:00:21 mb32 /bsd: bInterfaceProtocol=0x00 May 30 14:00:21 mb32 /bsd: iInterface=0x04 May 30 14:00:21 mb32 /bsd: iInterface=0x04 May 30 14:00:21 mb32 /bsd: bLength=13 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x24 (CS_INTERFACE) May 30 14:00:21 mb32 /bsd: bDescriptorSubtype=0x01 (UDESCSUB_VC_HEADER) May 30 14:00:21 mb32 /bsd: | May 30 14:00:21 mb32 /bsd: bLength=13 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x24 May 30 14:00:21 mb32 /bsd: bDescriptorSubtype=0x01 May 30 14:00:21 mb32 /bsd: bcdUVC=0x0100 May 30 14:00:21 mb32 /bsd: wTotalLength=79 May 30 14:00:21 mb32 /bsd: dwClockFrequency=3000 May 30 14:00:21 mb32 /bsd: bInCollection=0x01 May 30 14:00:21 mb32 /bsd: bInCollection=0x01 May 30 14:00:21 mb32 /bsd: bLength=28 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x24 (CS_INTERFACE) May 30 14:00:21 mb32 /bsd: bDescriptorSubtype=0x06 (UDESCSUB_VC_EXTENSION_UNIT) May 30 14:00:21 mb32 /bsd: | May 30 14:00:21 mb32 /bsd: bLength=28 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x24 May 30 14:00:21 mb32 /bsd: bDescriptorSubtype=0x06 May 30 14:00:21 mb32 /bsd: bUnitID=0x06 May 30 14:00:21 mb32 /bsd: guidExtensionCode=0xb0d0bb68a461834b90b7a6215f3c4f70 May 30 14:00:21 mb32 /bsd: bNumControls=0x18 May 30 14:00:21 mb32 /bsd: bNrInPins=0x01 May 30 14:00:21 mb32 /bsd: bNrInPins=0x01 May 30 14:00:21 mb32 /bsd: bLength=18 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x24 (CS_INTERFACE) May 30 14:00:21 mb32 /bsd: bDescriptorSubtype=0x02 (UDESCSUB_VC_INPUT_TERMINAL) May 30 14:00:21 mb32 /bsd: | May 30 14:00:21 mb32 /bsd: bLength=18 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x24 May 30 14:00:21 mb32 /bsd: bDescriptorSubtype=0x02 May 30 14:00:21 mb32 /bsd: bTerminalID=0x01 May 30 14:00:21 mb32 /bsd: wTerminalType=0x0201 May 30 14:00:21 mb32 /bsd: bAssocTerminal=0x00 May 30 14:00:21 mb32 /bsd: iTerminal=0x00 May 30 14:00:21 mb32 /bsd: iTerminal=0x00 May 30 14:00:21 mb32 /bsd: bLength=11 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x24 (CS_INTERFACE) May 30 14:00:21 mb32 /bsd: bDescriptorSubtype=0x05 (UDESCSUB_VC_PROCESSING_UNIT) May 30 14:00:21 mb32 /bsd: | May 30 14:00:21 mb32 /bsd: bLength=11 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x24 May 30 14:00:21 mb32 /bsd: bDescriptorSubtype=0x05 May 30 14:00:21 mb32 /bsd: bUnitID=0x02 May 30 14:00:21 mb32 /bsd: bSourceID=0x01 May 30 14:00:21 mb32 /bsd: wMaxMultiplier=0 May 30 14:00:21 mb32 /bsd: bControlSize=2 May 30 14:00:21 mb32 /bsd: bmControls=0xff37 May 30 14:00:21 mb32 /bsd: iProcessing=0x00 May 30 14:00:21 mb32 /bsd: bmVideoStandards=0x09 May 30 14:00:21 mb32 /bsd: bmVideoStandards=0x09 May 30 14:00:21 mb32 /bsd: bLength=9 May 30 14:00:21 mb32 /bsd: bDescriptorType=0x24 (CS_INTERFACE) May 30 14:00:21 mb32 /bsd: bDescriptorSubtype=0x03 (UDESCSU
Re: USB camera has "no usable YUV encodings"
> On Aug 23 15:56:00, s...@spacehopper.org wrote: > > > so is it some format based on a sequence of jpges? > > MJPEG? that's possible. > > Try some of these: > > mplayer tv:// > > Works, looks like video(1), but full-screen > (which is how my mplayer is configured). > > $ mplayer -tv device=/dev/video1 tv:// > MPlayer SVN-r38138 (C) 2000-2019 MPlayer Team > > Playing tv://. > TV file format detected. > Selected driver: v4l2 > name: Video 4 Linux 2 input > author: Martin Olschewski > comment: first try, more to come ;-) > v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM > was used instead. > Selected device: MikrOkularHD > Capabilities:video capture read/write streaming > supported norms: > inputs: 0 = Camera Terminal; > Current input: 0 > Current format: MJPEG > v4l2: ioctl set format failed: Invalid argument > v4l2: ioctl set mute failed: Invalid argument > v4l2: 0 frames successfully processed, 0 frames dropped. > > It does not play, but it recognizes the device > and apparently, it is a MJPEG stream. Thanks. Hm, now the same command does play, and there is yeast on my monitor. Thanks. mplayer auto-recognizes the mjpeg format, but reports a lot of frame-decoding errors (see below). Jan hans@dell:~$ mplayer -tv device=/dev/video1 tv:// MPlayer SVN-r38138 (C) 2000-2019 MPlayer Team Playing tv://. TV file format detected. Selected driver: v4l2 name: Video 4 Linux 2 input author: Martin Olschewski comment: first try, more to come ;-) v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead. Selected device: MikrOkularHD Capabilities: video capture read/write streaming supported norms: inputs: 0 = Camera Terminal; Current input: 0 Current format: MJPEG v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument tv.c: norm_from_string(pal): Bogus norm parameter, setting default. v4l2: ioctl enum norm failed: Inappropriate ioctl for device Error: Cannot set norm! Selected input hasn't got a tuner! v4l2: ioctl set mute failed: Invalid argument == Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family libavcodec version 58.54.100 (external) Selected video codec: [ffmjpeg] vfm: ffmpeg (FFmpeg MJPEG) == Audio: no sound Starting playback... [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ignoring [mjpeg @ 0x1db8899f61e0]Found EOI before any SOF, ig
Re: USB camera has "no usable YUV encodings"
Hi, I've this kind of message in this bug: https://marc.info/?l=openbsd-bugs&m=156528542405039 Maybe related? Cheers, On Fri, Aug 23, 2019 at 8:45 PM Jan Stary wrote: > > > Thanks for the tips. Here is what they do > > on video1 (the USB microscope camera). > > During these tests, this appeared in the messages: > > uvideo1 at uhub0 port 1 configuration 1 interface 0 "Alcor Micro > MikrOkularHD" rev 2.00/0.00 addr 4 > video1 at uvideo1 > uvideo1: could not open VS pipe: IOERROR > xhci0: wrong trb index (4134157312) max is 255 > xhci0: wrong trb index (4134157312) max is 255 > uvideo1: could not SET probe request: TIMEOUT > xhci0: wrong trb index (4134157312) max is 255 > xhci0: wrong trb index (4134157312) max is 255 > uvideo1: could not SET probe request: TIMEOUT > xhci0: wrong trb index (4134157312) max is 255 > xhci0: wrong trb index (4134157312) max is 255 > uvideo1: could not SET probe request: TIMEOUT > xhci0: wrong trb index (4134157312) max is 255 > xhci0: wrong trb index (4134157312) max is 255 > uvideo1: could not SET probe request: TIMEOUT > xhci0: wrong trb index (4134157312) max is 255 > xhci0: wrong trb index (4134157312) max is 255 > uvideo1: could not SET probe request: TIMEOUT > xhci0: wrong trb index (4134157312) max is 255 > xhci0: wrong trb index (4134157312) max is 255 > uvideo1: could not SET probe request: TIMEOUT > xhci0: wrong trb index (4134157312) max is 255 > uvideo1: could not SET probe request: TIMEOUT > xhci0: wrong trb index (4134157312) max is 255 > uvideo1: could not SET probe request: TIMEOUT > xhci0: wrong trb index (4134157312) max is 255 > uvideo1: could not SET probe request: TIMEOUT > xhci0: wrong trb index (4134157312) max is 255 > xhci0: wrong trb index (4134157312) max is 255 > xhci0: wrong trb index (4134157312) max is 255 > xhci0: wrong trb index (4134157312) max is 255 > uvideo1: could not SET probe request: TIMEOUT > xhci0: wrong trb index (4134157312) max is 255 > xhci0: wrong trb index (4134157312) max is 255 > xhci0: wrong trb index (4134157312) max is 255 > xhci0: wrong trb index (4134157312) max is 255 > uvideo1: could not SET probe request: TIMEOUT > xhci0: wrong trb index (4134157312) max is 255 > uvideo1: could not SET probe request: TIMEOUT > xhci0: wrong trb index (4134157312) max is 255 > > Can somebody please advice on what these mean? > > Jan >
Re: USB camera has "no usable YUV encodings"
> Thanks for the tips. Here is what they do > on video1 (the USB microscope camera). During these tests, this appeared in the messages: uvideo1 at uhub0 port 1 configuration 1 interface 0 "Alcor Micro MikrOkularHD" rev 2.00/0.00 addr 4 video1 at uvideo1 uvideo1: could not open VS pipe: IOERROR xhci0: wrong trb index (4134157312) max is 255 xhci0: wrong trb index (4134157312) max is 255 uvideo1: could not SET probe request: TIMEOUT xhci0: wrong trb index (4134157312) max is 255 xhci0: wrong trb index (4134157312) max is 255 uvideo1: could not SET probe request: TIMEOUT xhci0: wrong trb index (4134157312) max is 255 xhci0: wrong trb index (4134157312) max is 255 uvideo1: could not SET probe request: TIMEOUT xhci0: wrong trb index (4134157312) max is 255 xhci0: wrong trb index (4134157312) max is 255 uvideo1: could not SET probe request: TIMEOUT xhci0: wrong trb index (4134157312) max is 255 xhci0: wrong trb index (4134157312) max is 255 uvideo1: could not SET probe request: TIMEOUT xhci0: wrong trb index (4134157312) max is 255 xhci0: wrong trb index (4134157312) max is 255 uvideo1: could not SET probe request: TIMEOUT xhci0: wrong trb index (4134157312) max is 255 uvideo1: could not SET probe request: TIMEOUT xhci0: wrong trb index (4134157312) max is 255 uvideo1: could not SET probe request: TIMEOUT xhci0: wrong trb index (4134157312) max is 255 uvideo1: could not SET probe request: TIMEOUT xhci0: wrong trb index (4134157312) max is 255 xhci0: wrong trb index (4134157312) max is 255 xhci0: wrong trb index (4134157312) max is 255 xhci0: wrong trb index (4134157312) max is 255 uvideo1: could not SET probe request: TIMEOUT xhci0: wrong trb index (4134157312) max is 255 xhci0: wrong trb index (4134157312) max is 255 xhci0: wrong trb index (4134157312) max is 255 xhci0: wrong trb index (4134157312) max is 255 uvideo1: could not SET probe request: TIMEOUT xhci0: wrong trb index (4134157312) max is 255 uvideo1: could not SET probe request: TIMEOUT xhci0: wrong trb index (4134157312) max is 255 Can somebody please advice on what these mean? Jan
Re: USB camera has "no usable YUV encodings"
On Aug 23 15:38:17, m...@patrick-wildt.de wrote: > Try using ffmpeg on /dev/video1 On Aug 23 15:56:00, s...@spacehopper.org wrote: > > $ doas video -f /dev/video1 -v > > doas (h...@dell.stare.cz) password: > > video: /dev/video1 has no usable YUV encodings > > > > The device itself works, in that "doas cat /dev/video1 > /tmp/video.raw" > > spews out data, presumably frames captured by the camera. I can even > > play that back with "video -i /tmp/video.raw", but it's garbage, > > not being in one of the "YUV encodings". file(1) says > > > > /tmp/video.raw: JPEG image data, JFIF standard 1.01, > > baseline, precision 0, 4360x720 > > > > so is it some format based on a sequence of jpges? > > (Please excuse my video ignorance.) > > MJPEG? that's possible. > > Try some of these: Thanks for the tips. Here is what they do on video0 (the built-in laptop webcam) and on video1 (the USB microscope camera). > ffplay -f video4linux2 /dev/video0 Works, even without the -f video4linux2 (which seems to be default); looks much like what video(1) does. (Is -f video4linux a catch-all codec to recognize any format it knows?) $ ffplay -f video4linux2 /dev/video1 [...] [video4linux2,v4l2 @ 0x1f74a6354800] Cannot find a proper format for codec 'none' (id 0), pixel format 'none' (id -1) Assertion *codec_id != AV_CODEC_ID_NONE failed at libavdevice/v4l2.c:815 Abort trap (core dumped) > gst-launch-1.0 v4l2src \! xvimagesink I have libv4l-1.16.6 and gstreamer-plugins-good-0.10.31p25v0 - is there something else I need to run this? > mplayer tv:// Works, looks like video(1), but full-screen (which is how my mplayer is configured). $ mplayer -tv device=/dev/video1 tv:// MPlayer SVN-r38138 (C) 2000-2019 MPlayer Team Playing tv://. TV file format detected. Selected driver: v4l2 name: Video 4 Linux 2 input author: Martin Olschewski comment: first try, more to come ;-) v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead. Selected device: MikrOkularHD Capabilities: video capture read/write streaming supported norms: inputs: 0 = Camera Terminal; Current input: 0 Current format: MJPEG v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set mute failed: Invalid argument v4l2: 0 frames successfully processed, 0 frames dropped. It does not play, but it recognizes the device and apparently, it is a MJPEG stream. Thanks. > mpv tv:// Displays 640x480 worth of garbage. Playing: tv:// [tv] Selected driver: v4l2 [tv] name: Video 4 Linux 2 input [tv] your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead. [tv] Selected device: Integrated_Webcam_HD [tv] Capabilities: video capture read/write streaming [tv] supported norms: [tv] inputs: 0 = Camera Terminal; [tv] Current input: 0 [tv] Current format: RGB24 [tv] tv.c: norm_from_string(pal): Bogus norm parameter, setting default. [tv] ioctl enum norm failed: Inappropriate ioctl for device [tv] Error: Cannot set norm! [tv] Selected input hasn't got a tuner! [tv] ioctl set mute failed: Invalid argument (+) Video --vid=1 (rawvideo 640x480 30.000fps) [gpu] 640x480 yuv420p $ mpv --tv-device=/dev/video1 tv:// Playing: tv:// [tv] Selected driver: v4l2 [tv] name: Video 4 Linux 2 input libv4l2: error setting pixformat: Invalid argument [tv] your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead. [tv] Selected device: MikrOkularHD [tv] Capabilities: video capture read/write streaming [tv] supported norms: [tv] inputs: 0 = Camera Terminal; [tv] Current input: 0 [tv] Current format: MJPEG libv4l2: error setting pixformat: Invalid argument [tv] ioctl set format failed: Invalid argument [tv] ioctl set mute failed: Invalid argument [tv] 0 frames successfully processed, 0 frames dropped Knowing I have a mjpeg stream, I will try to massage the cmdlines some more. Thanks again for the tips, Jan
Re: USB camera has "no usable YUV encodings"
On 2019-08-23, Jan Stary wrote: > This is current/amd64 on a Dell Latitude E5570 (dmesg below). > I am trying to use a USB camera (bought with a microscope, > to display the miracles of paramecium life on the laptop). > > https://www.bresser.de/en/Astronomy/Accessories/BRESSER-MikrOkular-Full-HD-eyepiece-camera.html > > uvideo1 at uhub0 port 1 configuration 1 interface 0 "Alcor Micro > MikrOkularHD" rev 2.00/0.00 addr 4 > video1 at uvideo1 > > While video(1) works with the laptop's integrated camera (video0), > it doesn't work with this USB camera (video1): > > $ doas video -f /dev/video1 -v > doas (h...@dell.stare.cz) password: > video: /dev/video1 has no usable YUV encodings > > The device itself works, in that "doas cat /dev/video1 > /tmp/video.raw" > spews out data, presumably frames captured by the camera. I can even > play that back with "video -i /tmp/video.raw", but it's garbage, > not being in one of the "YUV encodings". file(1) says > > /tmp/video.raw: JPEG image data, JFIF standard 1.01, > baseline, precision 0, 4360x720 > > so is it some format based on a sequence of jpges? > (Please excuse my video ignorance.) MJPEG? that's possible. Try some of these: ffplay -f video4linux2 /dev/video0 gst-launch-1.0 v4l2src \! xvimagesink mplayer tv:// mpv tv:// If you want to record, and ffplay works, you should at least be able to use ffmpeg and write a file with a standard container format.
USB camera has "no usable YUV encodings"
This is current/amd64 on a Dell Latitude E5570 (dmesg below). I am trying to use a USB camera (bought with a microscope, to display the miracles of paramecium life on the laptop). https://www.bresser.de/en/Astronomy/Accessories/BRESSER-MikrOkular-Full-HD-eyepiece-camera.html uvideo1 at uhub0 port 1 configuration 1 interface 0 "Alcor Micro MikrOkularHD" rev 2.00/0.00 addr 4 video1 at uvideo1 While video(1) works with the laptop's integrated camera (video0), it doesn't work with this USB camera (video1): $ doas video -f /dev/video1 -v doas (h...@dell.stare.cz) password: video: /dev/video1 has no usable YUV encodings The device itself works, in that "doas cat /dev/video1 > /tmp/video.raw" spews out data, presumably frames captured by the camera. I can even play that back with "video -i /tmp/video.raw", but it's garbage, not being in one of the "YUV encodings". file(1) says /tmp/video.raw: JPEG image data, JFIF standard 1.01, baseline, precision 0, 4360x720 so is it some format based on a sequence of jpges? (Please excuse my video ignorance.) The specification says "UVC" standard, which by https://en.wikipedia.org/wiki/USB_video_device_class means would support _some_ UVC-compliant format. Am I out f luck? Is there a way to capture what this camera sees, beside video(1), in some "raw" format? Something _is_ comming out. This is the result of "doas cat /dev/video1 > /tmp/video.raw": http://stare.cz/.tmp/video.raw TIA for any hint. Jan OpenBSD 6.6-beta (GENERIC.MP) #0: Mon Aug 19 17:13:12 CEST 2019 h...@dell.stare.cz:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 16810340352 (16031MB) avail mem = 16288194560 (15533MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xeac10 (107 entries) bios0: vendor Dell Inc. version "1.5.0" date 04/22/2016 bios0: Dell Inc. Latitude E5570 acpi0 at bios0: ACPI 5.0 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP APIC FPDT FIDT MCFG HPET SSDT LPIT SSDT SSDT SSDT DBGP DBG2 SSDT UEFI SSDT SSDT SLIC ASF! acpi0: wakeup devices PEG0(S4) PEGP(S4) PEG1(S4) PEGP(S4) PEG2(S4) PEGP(S4) RP09(S4) PXSX(S4) RP10(S4) PXSX(S4) RP11(S4) PXSX(S4) RP12(S4) PXSX(S4) RP13(S4) PXSX(S4) [...] acpitimer0 at acpi0: 3579545 Hz, 24 bits acpimadt0 at acpi0 addr 0xfee0: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Core(TM) i5-6440HQ CPU @ 2.60GHz, 2295.51 MHz, 06-5e-03 cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,SGX,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,MD_CLEAR,TSXFA,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN cpu0: 256KB 64b/line 8-way L2 cache tsc_timecounter_init: TSC skew=0 observed drift=0 cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges cpu0: apic clock running at 24MHz cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4.1.1.1, IBE cpu1 at mainbus0: apid 2 (application processor) TSC skew=4 cpu1: Intel(R) Core(TM) i5-6440HQ CPU @ 2.60GHz, 2294.67 MHz, 06-5e-03 cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,SGX,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,MD_CLEAR,TSXFA,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN cpu1: 256KB 64b/line 8-way L2 cache tsc_timecounter_init: TSC skew=4 observed drift=0 cpu1: smt 0, core 1, package 0 cpu2 at mainbus0: apid 4 (application processor) TSC skew=1 cpu2: Intel(R) Core(TM) i5-6440HQ CPU @ 2.60GHz, 2294.67 MHz, 06-5e-03 cpu2: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,SGX,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,MD_CLEAR,TSXFA,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN cpu2: 256KB 64b/line 8-way L2 cache tsc_timecounter_init: TSC skew=1 observed drift=0 cpu2: smt 0, core 2, package 0 cpu3 at mainbus0: apid 6 (application processor) TSC skew=-80 cpu3: Intel(R) Core(TM) i5-6440HQ CPU @ 2.60GHz, 2294.67 MHz, 06-5e-03 cpu3: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PS
