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Raspberry PIで2つの同じカメラを使用して同時にビデオを録画する

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Raspberry PIで2つの同じカメラを使用して同時にビデオを録画する

同じUSBカメラ2台を使ってRaspberry Pi 4 1GB（Raspbian 10）に動画を録画したいです。どちらのカメラもVID：PID（）とシリアル番号（SN5100）が同じであるため、特定の時間05a3:9530にカメラの1つだけがビデオを記録します。

一緒に写真を撮ると気持ちがおかしいと思います。

fswebcam -d /dev/video0

または

fswebcam -d /dev/video2

常に正しいカメラで写真を撮ります。したがって、オペレーティングシステムまたはUSBコントローラには、これを処理する他の方法が必要です。

両方のカメラが接続されている場合分離私のコンピュータにはUSBコントローラがあり、同時にビデオを録画します。ただし、RPiにはこのオプションはありません。

私が試したこと：

  • OBSに2台のカメラを追加 - 最初に追加されたカメラのみが機能
  • MotionEyeでの使用 - OBSと同じ

  • 2つの異なるUSBカメラを使用 - 両方のカメラが同時に動作しますが、残念ながら、この回避策は問題を解決しませんでした。

  • ffmpegを使用してカメラからストリームを再生します。

ffplay -f video4linux2 -i /dev/video0

そして

ffplay -f video4linux2 -i /dev/video2

最初のカメラは正常に再生され、2番目のカメラは端末に出力されます。

nan: 0.000 fd= 0 aq= 0KB vq= 0KB sq= 0KB f= 0/0

最初のストリームが終了すると、2番目のカメラはすぐに動作を開始します。

  • 私が管理しているUSBポートに接続したときに試したすべてのコンピュータで問題が解決しません。同じUSBコントローラ
  • USBハブの使用

  • 新しいPIDを作成中sys/bus/usb/devices/1-1.4/idProduct- ファイルを書き込めません

  • 1つのUSBポートにカスタムudevルールを追加し、名前を変更するか、シンボリックリンクを追加します。

KERNEL=="1-1.4", NAME="device_1_4"

または

KERNEL=="1-1.4", SYMLINK+="device_1_4"

次の出力に基づいてこれを区別する他の方法はありません。

udevadm info --attribute-walk --path=/sys/bus/usb/devices/1-1.4

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4':
    KERNEL=="1-1.4"
    SUBSYSTEM=="usb"
    DRIVER=="usb"
    ATTR{manufacturer}=="Sonix Technology Co., Ltd."
    ATTR{maxchild}=="0"
    ATTR{idVendor}=="05a3"
    ATTR{bNumInterfaces}==" 2"
    ATTR{authorized}=="1"
    ATTR{bMaxPacketSize0}=="64"
    ATTR{devpath}=="1.4"
    ATTR{bNumConfigurations}=="1"
    ATTR{configuration}==""
    ATTR{removable}=="unknown"
    ATTR{urbnum}=="55639"
    ATTR{rx_lanes}=="1"
    ATTR{bmAttributes}=="80"
    ATTR{version}==" 2.00"
    ATTR{idProduct}=="9530"
    ATTR{serial}=="SN5100"
    ATTR{bDeviceSubClass}=="02"
    ATTR{bDeviceClass}=="ef"
    ATTR{bDeviceProtocol}=="01"
    ATTR{product}=="USB 2.0 Camera"
    ATTR{devspec}=="  (null)"
    ATTR{avoid_reset_quirk}=="0"
    ATTR{ltm_capable}=="no"
    ATTR{devnum}=="11"
    ATTR{bMaxPower}=="256mA"
    ATTR{quirks}=="0x0"
    ATTR{tx_lanes}=="1"
    ATTR{speed}=="480"
    ATTR{bcdDevice}=="0100"
    ATTR{bConfigurationValue}=="1"
    ATTR{busnum}=="1"

  looking at parent device '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1':
    KERNELS=="1-1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{busnum}=="1"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="455"
    ATTRS{product}=="USB2.0 Hub"
    ATTRS{quirks}=="0x0"
    ATTRS{devspec}=="  (null)"
    ATTRS{bMaxPower}=="100mA"
    ATTRS{ltm_capable}=="no"
    ATTRS{idProduct}=="3431"
    ATTRS{idVendor}=="2109"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{maxchild}=="4"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bmAttributes}=="e0"
    ATTRS{tx_lanes}=="1"
    ATTRS{devnum}=="2"
    ATTRS{removable}=="unknown"
    ATTRS{bcdDevice}=="0421"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{configuration}==""
    ATTRS{version}==" 2.10"
    ATTRS{rx_lanes}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{devpath}=="1"
    ATTRS{authorized}=="1"

  looking at parent device '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1':
    KERNELS=="usb1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{speed}=="480"
    ATTRS{idProduct}=="0002"
    ATTRS{maxchild}=="1"
    ATTRS{bcdDevice}=="0419"
    ATTRS{devnum}=="1"
    ATTRS{tx_lanes}=="1"
    ATTRS{manufacturer}=="Linux 4.19.97-v7l+ xhci-hcd"
    ATTRS{idVendor}=="1d6b"
    ATTRS{bMaxPower}=="0mA"
    ATTRS{removable}=="unknown"
    ATTRS{product}=="xHCI Host Controller"
    ATTRS{busnum}=="1"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{serial}=="0000:01:00.0"
    ATTRS{authorized}=="1"
    ATTRS{authorized_default}=="1"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bmAttributes}=="e0"
    ATTRS{devspec}=="  (null)"
    ATTRS{version}==" 2.00"
    ATTRS{bDeviceClass}=="09"
    ATTRS{urbnum}=="201"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{quirks}=="0x0"
    ATTRS{ltm_capable}=="no"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{devpath}=="0"
    ATTRS{rx_lanes}=="1"
    ATTRS{interface_authorized_default}=="1"
    ATTRS{configuration}==""

  looking at parent device '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0':
    KERNELS=="0000:01:00.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="xhci_hcd"
    ATTRS{consistent_dma_mask_bits}=="64"
    ATTRS{local_cpus}=="f"
    ATTRS{enable}=="1"
    ATTRS{broken_parity_status}=="0"
    ATTRS{devspec}==""
    ATTRS{dma_mask_bits}=="64"
    ATTRS{device}=="0x3483"
    ATTRS{max_link_width}=="1"
    ATTRS{class}=="0x0c0330"
    ATTRS{driver_override}=="(null)"
    ATTRS{irq}=="54"
    ATTRS{ari_enabled}=="0"
    ATTRS{subsystem_device}=="0x3483"
    ATTRS{msi_bus}=="1"
    ATTRS{vendor}=="0x1106"
    ATTRS{subsystem_vendor}=="0x1106"
    ATTRS{revision}=="0x01"
    ATTRS{current_link_width}=="1"
    ATTRS{local_cpulist}=="0-3"
    ATTRS{current_link_speed}=="5 GT/s"
    ATTRS{max_link_speed}=="5 GT/s"

  looking at parent device '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0':
    KERNELS=="0000:00:00.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="pcieport"
    ATTRS{max_link_speed}=="5 GT/s"
    ATTRS{broken_parity_status}=="0"
    ATTRS{subsystem_vendor}=="0x0000"
    ATTRS{aer_rootport_total_err_cor}=="0"
    ATTRS{max_link_width}=="1"
    ATTRS{current_link_width}=="1"
    ATTRS{secondary_bus_number}=="1"
    ATTRS{driver_override}=="(null)"
    ATTRS{vendor}=="0x14e4"
    ATTRS{class}=="0x060400"
    ATTRS{consistent_dma_mask_bits}=="32"
    ATTRS{irq}=="53"
    ATTRS{device}=="0x2711"
    ATTRS{subsystem_device}=="0x0000"
    ATTRS{subordinate_bus_number}=="1"
    ATTRS{local_cpulist}=="0-3"
    ATTRS{msi_bus}=="1"
    ATTRS{devspec}==""
    ATTRS{current_link_speed}=="5 GT/s"
    ATTRS{aer_rootport_total_err_fatal}=="0"
    ATTRS{local_cpus}=="f"
    ATTRS{ari_enabled}=="0"
    ATTRS{revision}=="0x10"
    ATTRS{aer_rootport_total_err_nonfatal}=="0"
    ATTRS{dma_mask_bits}=="32"
    ATTRS{enable}=="1"

  looking at parent device '/devices/platform/scb/fd500000.pcie/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""

  looking at parent device '/devices/platform/scb/fd500000.pcie':
    KERNELS=="fd500000.pcie"
    SUBSYSTEMS=="platform"
    DRIVERS=="brcm-pcie"
    ATTRS{dmabounce_stats}=="m:0/0 s:0/0 f:0 s:0 b:0/0 a:0/0"
    ATTRS{driver_override}=="(null)"

  looking at parent device '/devices/platform/scb':
    KERNELS=="scb"
    SUBSYSTEMS=="platform"
    DRIVERS==""
    ATTRS{driver_override}=="(null)"

  looking at parent device '/devices/platform':
    KERNELS=="platform"
    SUBSYSTEMS==""
    DRIVERS==""

2番目のカメラの場合：

udevadm info --attribute-walk --path=/sys/bus/usb/devices/1-1.1

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.1':
    KERNEL=="1-1.1"
    SUBSYSTEM=="usb"
    DRIVER=="usb"
    ATTR{devspec}=="  (null)"
    ATTR{urbnum}=="146921"
    ATTR{tx_lanes}=="1"
    ATTR{configuration}==""
    ATTR{speed}=="480"
    ATTR{bNumInterfaces}==" 2"
    ATTR{manufacturer}=="Sonix Technology Co., Ltd."
    ATTR{bDeviceProtocol}=="01"
    ATTR{devpath}=="1.1"
    ATTR{busnum}=="1"
    ATTR{bcdDevice}=="0100"
    ATTR{bMaxPower}=="256mA"
    ATTR{version}==" 2.00"
    ATTR{serial}=="SN5100"
    ATTR{bDeviceClass}=="ef"
    ATTR{bConfigurationValue}=="1"
    ATTR{product}=="USB 2.0 Camera"
    ATTR{idProduct}=="9530"
    ATTR{avoid_reset_quirk}=="0"
    ATTR{idVendor}=="05a3"
    ATTR{bNumConfigurations}=="1"
    ATTR{bDeviceSubClass}=="02"
    ATTR{rx_lanes}=="1"
    ATTR{authorized}=="1"
    ATTR{maxchild}=="0"
    ATTR{removable}=="unknown"
    ATTR{bMaxPacketSize0}=="64"
    ATTR{ltm_capable}=="no"
    ATTR{bmAttributes}=="80"
    ATTR{devnum}=="9"
    ATTR{quirks}=="0x0"

  looking at parent device '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1':
    KERNELS=="1-1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{quirks}=="0x0"
    ATTRS{bmAttributes}=="e0"
    ATTRS{tx_lanes}=="1"
    ATTRS{devnum}=="2"
    ATTRS{configuration}==""
    ATTRS{authorized}=="1"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPower}=="100mA"
    ATTRS{product}=="USB2.0 Hub"
    ATTRS{idProduct}=="3431"
    ATTRS{idVendor}=="2109"
    ATTRS{busnum}=="1"
    ATTRS{devpath}=="1"
    ATTRS{urbnum}=="473"
    ATTRS{bcdDevice}=="0421"
    ATTRS{removable}=="unknown"
    ATTRS{maxchild}=="4"
    ATTRS{speed}=="480"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{devspec}=="  (null)"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{rx_lanes}=="1"
    ATTRS{ltm_capable}=="no"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{version}==" 2.10"
    ATTRS{avoid_reset_quirk}=="0"

  looking at parent device '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1':
    KERNELS=="usb1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{tx_lanes}=="1"
    ATTRS{product}=="xHCI Host Controller"
    ATTRS{rx_lanes}=="1"
    ATTRS{bMaxPower}=="0mA"
    ATTRS{idVendor}=="1d6b"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{authorized_default}=="1"
    ATTRS{urbnum}=="210"
    ATTRS{devpath}=="0"
    ATTRS{bmAttributes}=="e0"
    ATTRS{ltm_capable}=="no"
    ATTRS{idProduct}=="0002"
    ATTRS{bDeviceClass}=="09"
    ATTRS{configuration}==""
    ATTRS{version}==" 2.00"
    ATTRS{bcdDevice}=="0419"
    ATTRS{serial}=="0000:01:00.0"
    ATTRS{busnum}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{devnum}=="1"
    ATTRS{manufacturer}=="Linux 4.19.97-v7l+ xhci-hcd"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{speed}=="480"
    ATTRS{authorized}=="1"
    ATTRS{devspec}=="  (null)"
    ATTRS{interface_authorized_default}=="1"
    ATTRS{quirks}=="0x0"
    ATTRS{maxchild}=="1"
    ATTRS{removable}=="unknown"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bNumConfigurations}=="1"

  looking at parent device '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0':
    KERNELS=="0000:01:00.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="xhci_hcd"
    ATTRS{class}=="0x0c0330"
    ATTRS{current_link_speed}=="5 GT/s"
    ATTRS{msi_bus}=="1"
    ATTRS{revision}=="0x01"
    ATTRS{vendor}=="0x1106"
    ATTRS{driver_override}=="(null)"
    ATTRS{max_link_width}=="1"
    ATTRS{broken_parity_status}=="0"
    ATTRS{devspec}==""
    ATTRS{dma_mask_bits}=="64"
    ATTRS{ari_enabled}=="0"
    ATTRS{enable}=="1"
    ATTRS{irq}=="54"
    ATTRS{subsystem_vendor}=="0x1106"
    ATTRS{device}=="0x3483"
    ATTRS{max_link_speed}=="5 GT/s"
    ATTRS{current_link_width}=="1"
    ATTRS{consistent_dma_mask_bits}=="64"
    ATTRS{subsystem_device}=="0x3483"
    ATTRS{local_cpus}=="f"
    ATTRS{local_cpulist}=="0-3"

  looking at parent device '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0':
    KERNELS=="0000:00:00.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="pcieport"
    ATTRS{revision}=="0x10"
    ATTRS{consistent_dma_mask_bits}=="32"
    ATTRS{irq}=="53"
    ATTRS{subsystem_device}=="0x0000"
    ATTRS{msi_bus}=="1"
    ATTRS{max_link_width}=="1"
    ATTRS{broken_parity_status}=="0"
    ATTRS{enable}=="1"
    ATTRS{subordinate_bus_number}=="1"
    ATTRS{subsystem_vendor}=="0x0000"
    ATTRS{current_link_width}=="1"
    ATTRS{driver_override}=="(null)"
    ATTRS{device}=="0x2711"
    ATTRS{aer_rootport_total_err_cor}=="0"
    ATTRS{ari_enabled}=="0"
    ATTRS{local_cpus}=="f"
    ATTRS{class}=="0x060400"
    ATTRS{max_link_speed}=="5 GT/s"
    ATTRS{dma_mask_bits}=="32"
    ATTRS{aer_rootport_total_err_nonfatal}=="0"
    ATTRS{local_cpulist}=="0-3"
    ATTRS{current_link_speed}=="5 GT/s"
    ATTRS{aer_rootport_total_err_fatal}=="0"
    ATTRS{secondary_bus_number}=="1"
    ATTRS{devspec}==""
    ATTRS{vendor}=="0x14e4"

  looking at parent device '/devices/platform/scb/fd500000.pcie/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""

  looking at parent device '/devices/platform/scb/fd500000.pcie':
    KERNELS=="fd500000.pcie"
    SUBSYSTEMS=="platform"
    DRIVERS=="brcm-pcie"
    ATTRS{driver_override}=="(null)"
    ATTRS{dmabounce_stats}=="m:0/0 s:0/0 f:0 s:0 b:0/0 a:0/0"

  looking at parent device '/devices/platform/scb':
    KERNELS=="scb"
    SUBSYSTEMS=="platform"
    DRIVERS==""
    ATTRS{driver_override}=="(null)"

  looking at parent device '/devices/platform':
    KERNELS=="platform"
    SUBSYSTEMS==""
    DRIVERS==""

同時にビデオを録画する方法はありますか？

ベストアンサー1

Hermannがコメントで述べたように、2台のUSBカメラでは、ストリーミングビデオは次のように達成されます。

  • FFMPEG:
ffplay -f v4l2 -pixel_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video0

そして

ffplay -f v4l2 -pixel_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video2

両方- ピクセル形式そして- ビデオサイズv4l2-ctl --list-formats-ext出力の組み合わせでなければなりません。v4l2-ctl -d /dev/video0 (or other device) --list-formats-ext

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