Rules easycap

[bellad]

Bonjour,
comment faire un rules pour 2 easycap ayant les meme caracteristiques ( n° serie, etc …)
j’ai pensée par les numeros de port usb , mais je ne vois pas comment
pouvez vous m’aider ?

lsusb
Bus 001 Device 008: ID 357d:7788 Sharkoon QuickPort XT
Bus 001 Device 007: ID 1b71:3002 Fushicai USBTV007 Video Grabber [EasyCAP]
Bus 001 Device 006: ID 1b71:3002 Fushicai USBTV007 Video Grabber [EasyCAP]
Bus 001 Device 005: ID 2101:8501 ActionStar 
Bus 001 Device 004: ID 2101:8500 ActionStar 
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

[PascalHambourg]

Qu’appelles-tu “un rules” ? Une règle udev ?

[bellad]

oui , excuse

[PascalHambourg]

Si ces appareils sont vus comme des périphériques dans /dev/, tu peux utiliser la commande suivante pour afficher les attributs sur lesquels une règle udev pourrait se baser.

udevadm info --attribute-walk --name=/dev/xxx

[MicP]

Bonjour bellad

…j’ai pensée par les numeros de port usb…

Oui, c’est possible, et ça commence effectivement par l’analyse du retour de la ligne de commande
proposée par PascalHambourg

Ci-dessous, un lien vers un fil de discussion qui pourra sans doute t’aider
pour créer les règles udev qui vont nommer le fichier de périphérique
qui sera associé à chacun de ces “Video Grabber” :
linuxquestions.org : Udev Rules To Differentiate Between Multiple Identical Devices

[bellad]

--attribute-walk --name=/dev/

looking at device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.2':
KERNEL=="1-1.2.2"
SUBSYSTEM=="usb"
DRIVER=="usb"
ATTR{authorized}=="1"
ATTR{avoid_reset_quirk}=="0"
ATTR{bConfigurationValue}=="1"
ATTR{bDeviceClass}=="00"
ATTR{bDeviceProtocol}=="00"
ATTR{bDeviceSubClass}=="00"
ATTR{bMaxPacketSize0}=="64"
ATTR{bMaxPower}=="500mA"
ATTR{bNumConfigurations}=="1"
ATTR{bNumInterfaces}==" 1"
ATTR{bcdDevice}=="0100"
ATTR{bmAttributes}=="80"
ATTR{busnum}=="1"
ATTR{configuration}==""
ATTR{devnum}=="6"
ATTR{devpath}=="1.2.2"
ATTR{devspec}=="  (null)"
ATTR{idProduct}=="3002"
ATTR{idVendor}=="1b71"
ATTR{ltm_capable}=="no"
ATTR{manufacturer}=="fushicai"
ATTR{maxchild}=="0"
ATTR{product}=="usbtv007"
ATTR{quirks}=="0x0"
ATTR{removable}=="removable"
ATTR{serial}=="300000000002"
ATTR{speed}=="480"
ATTR{urbnum}=="10"
ATTR{version}==" 2.00"

et

l’autre

looking at device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.4':
KERNEL=="1-1.2.4"
SUBSYSTEM=="usb"
DRIVER=="usb"
ATTR{authorized}=="1"
ATTR{avoid_reset_quirk}=="0"
ATTR{bConfigurationValue}=="1"
ATTR{bDeviceClass}=="00"
ATTR{bDeviceProtocol}=="00"
ATTR{bDeviceSubClass}=="00"
ATTR{bMaxPacketSize0}=="64"
ATTR{bMaxPower}=="500mA"
ATTR{bNumConfigurations}=="1"
ATTR{bNumInterfaces}==" 1"
ATTR{bcdDevice}=="0100"
ATTR{bmAttributes}=="80"
ATTR{busnum}=="1"
ATTR{configuration}==""
ATTR{devnum}=="7"
ATTR{devpath}=="1.2.4"
ATTR{devspec}=="  (null)"
ATTR{idProduct}=="3002"
ATTR{idVendor}=="1b71"
ATTR{ltm_capable}=="no"
ATTR{manufacturer}=="fushicai"
ATTR{maxchild}=="0"
ATTR{product}=="usbtv007"
ATTR{quirks}=="0x0"
ATTR{removable}=="removable"
ATTR{serial}=="300000000002"
ATTR{speed}=="480"
ATTR{urbnum}=="10"
ATTR{version}==" 2.00"

[PascalHambourg]

A première vue les seuls éléments différenciant les deux périphériques l’un de l’autre sont KERNEL et ATTR{devpath}, qui font tous les deux référence à la position dans l’arbre des périphériques USB.

Quel est le but de la ou des règles udev que tu veux créer ?

[bellad]

j’aimerai que, en laissant toujours sur les memes port usb ( que j’aurai identifié physiquement ) , video0 à pour camera 1 et video1 à pour camera 2 et pas l’inverse au redemarrage par exemple

[PascalHambourg]

Quelle est la commande complète que tu as utilisée pour obtenir ces sorties, et est-ce que ce sont les sorties complètes ?

[bellad]

udevadm info --attribute-walk --name=/dev/bus/usb/001/007 

et

udevadm info --attribute-walk --name=/dev/bus/usb/001/006

pour le premier :

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/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.4':
    KERNEL=="1-1.2.4"
    SUBSYSTEM=="usb"
    DRIVER=="usb"
    ATTR{authorized}=="1"
    ATTR{avoid_reset_quirk}=="0"
    ATTR{bConfigurationValue}=="1"
    ATTR{bDeviceClass}=="00"
    ATTR{bDeviceProtocol}=="00"
    ATTR{bDeviceSubClass}=="00"
    ATTR{bMaxPacketSize0}=="64"
    ATTR{bMaxPower}=="500mA"
    ATTR{bNumConfigurations}=="1"
    ATTR{bNumInterfaces}==" 1"
    ATTR{bcdDevice}=="0100"
    ATTR{bmAttributes}=="80"
    ATTR{busnum}=="1"
    ATTR{configuration}==""
    ATTR{devnum}=="7"
    ATTR{devpath}=="1.2.4"
    ATTR{devspec}=="  (null)"
    ATTR{idProduct}=="3002"
    ATTR{idVendor}=="1b71"
    ATTR{ltm_capable}=="no"
    ATTR{manufacturer}=="fushicai"
    ATTR{maxchild}=="0"
    ATTR{product}=="usbtv007"
    ATTR{quirks}=="0x0"
    ATTR{removable}=="removable"
    ATTR{serial}=="300000000002"
    ATTR{speed}=="480"
    ATTR{urbnum}=="10"
    ATTR{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2':
    KERNELS=="1-1.2"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="02"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="100mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0106"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="4"
    ATTRS{devpath}=="1.2"
    ATTRS{devspec}=="  (null)"
    ATTRS{idProduct}=="8500"
    ATTRS{idVendor}=="2101"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Action Star"
    ATTRS{maxchild}=="5"
    ATTRS{product}=="USB2.0 Hub"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="removable"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="66"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1':
    KERNELS=="1-1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="02"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="2mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0200"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="2"
    ATTRS{devpath}=="1"
    ATTRS{idProduct}=="9514"
    ATTRS{idVendor}=="0424"
    ATTRS{ltm_capable}=="no"
    ATTRS{maxchild}=="5"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="37"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1':
    KERNELS=="usb1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{authorized_default}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="0mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0414"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="1"
    ATTRS{devpath}=="0"
    ATTRS{idProduct}=="0002"
    ATTRS{idVendor}=="1d6b"
    ATTRS{interface_authorized_default}=="1"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Linux 4.14.70-v7+ dwc_otg_hcd"
    ATTRS{maxchild}=="1"
    ATTRS{product}=="DWC OTG Controller"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{serial}=="3f980000.usb"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="25"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb':
    KERNELS=="3f980000.usb"
    SUBSYSTEMS=="platform"
    DRIVERS=="dwc_otg"
    ATTRS{busconnected}=="Bus Connected = 0x1"
    ATTRS{buspower}=="Bus Power = 0x1"
    ATTRS{bussuspend}=="Bus Suspend = 0x0"
    ATTRS{devspeed}=="Device Speed = 0x0"
    ATTRS{driver_override}=="(null)"
    ATTRS{enumspeed}=="Device Enumeration Speed = 0x1"
    ATTRS{fr_interval}=="Frame Interval = 0x1d4b"
    ATTRS{ggpio}=="GGPIO = 0x00000000"
    ATTRS{gnptxfsiz}=="GNPTXFSIZ = 0x01000306"
    ATTRS{gotgctl}=="GOTGCTL = 0x001c0001"
    ATTRS{gpvndctl}=="GPVNDCTL = 0x00000000"
    ATTRS{grxfsiz}=="GRXFSIZ = 0x00000306"
    ATTRS{gsnpsid}=="GSNPSID = 0x4f54280a"
    ATTRS{guid}=="GUID = 0x2708a000"
    ATTRS{gusbcfg}=="GUSBCFG = 0x20001700"
    ATTRS{hcd_frrem}=="HCD Dump Frame Remaining"
    ATTRS{hcddump}=="HCD Dump"
    ATTRS{hnp}=="HstNegScs = 0x0"
    ATTRS{hnpcapable}=="HNPCapable = 0x1"
    ATTRS{hprt0}=="HPRT0 = 0x00001005"
    ATTRS{hptxfsiz}=="HPTXFSIZ = 0x02000406"
    ATTRS{hsic_connect}=="HSIC Connect = 0x1"
    ATTRS{inv_sel_hsic}=="Invert Select HSIC = 0x0"
    ATTRS{mode}=="Mode = 0x1"
    ATTRS{mode_ch_tim_en}=="Mode Change Ready Timer Enable = 0x0"
    ATTRS{rd_reg_test}=="Time to read GNPTXFSIZ reg 10000000 times: 1420 msecs (142 jiffies)"
    ATTRS{regdump}=="Register Dump"
    ATTRS{regoffset}=="0xffffffff"
    ATTRS{regvalue}=="invalid offset"
    ATTRS{rem_wakeup_pwrdn}==""
    ATTRS{remote_wakeup}=="Remote Wakeup Sig = 0 Enabled = 0 LPM Remote Wakeup = 0"
    ATTRS{spramdump}=="SPRAM Dump"
    ATTRS{srp}=="SesReqScs = 0x1"
    ATTRS{srpcapable}=="SRPCapable = 0x1"
    ATTRS{wr_reg_test}=="Time to write GNPTXFSIZ reg 10000000 times: 490 msecs (49 jiffies)"

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

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

pour le second :

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/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.2':
    KERNEL=="1-1.2.2"
    SUBSYSTEM=="usb"
    DRIVER=="usb"
    ATTR{authorized}=="1"
    ATTR{avoid_reset_quirk}=="0"
    ATTR{bConfigurationValue}=="1"
    ATTR{bDeviceClass}=="00"
    ATTR{bDeviceProtocol}=="00"
    ATTR{bDeviceSubClass}=="00"
    ATTR{bMaxPacketSize0}=="64"
    ATTR{bMaxPower}=="500mA"
    ATTR{bNumConfigurations}=="1"
    ATTR{bNumInterfaces}==" 1"
    ATTR{bcdDevice}=="0100"
    ATTR{bmAttributes}=="80"
    ATTR{busnum}=="1"
    ATTR{configuration}==""
    ATTR{devnum}=="6"
    ATTR{devpath}=="1.2.2"
    ATTR{devspec}=="  (null)"
    ATTR{idProduct}=="3002"
    ATTR{idVendor}=="1b71"
    ATTR{ltm_capable}=="no"
    ATTR{manufacturer}=="fushicai"
    ATTR{maxchild}=="0"
    ATTR{product}=="usbtv007"
    ATTR{quirks}=="0x0"
    ATTR{removable}=="removable"
    ATTR{serial}=="300000000002"
    ATTR{speed}=="480"
    ATTR{urbnum}=="10"
    ATTR{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2':
    KERNELS=="1-1.2"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="02"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="100mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0106"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="4"
    ATTRS{devpath}=="1.2"
    ATTRS{devspec}=="  (null)"
    ATTRS{idProduct}=="8500"
    ATTRS{idVendor}=="2101"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Action Star"
    ATTRS{maxchild}=="5"
    ATTRS{product}=="USB2.0 Hub"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="removable"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="66"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1':
    KERNELS=="1-1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="02"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="2mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0200"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="2"
    ATTRS{devpath}=="1"
    ATTRS{idProduct}=="9514"
    ATTRS{idVendor}=="0424"
    ATTRS{ltm_capable}=="no"
    ATTRS{maxchild}=="5"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="37"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1':
    KERNELS=="usb1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{authorized_default}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="0mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0414"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="1"
    ATTRS{devpath}=="0"
    ATTRS{idProduct}=="0002"
    ATTRS{idVendor}=="1d6b"
    ATTRS{interface_authorized_default}=="1"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Linux 4.14.70-v7+ dwc_otg_hcd"
    ATTRS{maxchild}=="1"
    ATTRS{product}=="DWC OTG Controller"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{serial}=="3f980000.usb"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="25"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb':
    KERNELS=="3f980000.usb"
    SUBSYSTEMS=="platform"
    DRIVERS=="dwc_otg"
    ATTRS{busconnected}=="Bus Connected = 0x1"
    ATTRS{buspower}=="Bus Power = 0x1"
    ATTRS{bussuspend}=="Bus Suspend = 0x0"
    ATTRS{devspeed}=="Device Speed = 0x0"
    ATTRS{driver_override}=="(null)"
    ATTRS{enumspeed}=="Device Enumeration Speed = 0x1"
    ATTRS{fr_interval}=="Frame Interval = 0x1d4b"
    ATTRS{ggpio}=="GGPIO = 0x00000000"
    ATTRS{gnptxfsiz}=="GNPTXFSIZ = 0x01000306"
    ATTRS{gotgctl}=="GOTGCTL = 0x001c0001"
    ATTRS{gpvndctl}=="GPVNDCTL = 0x00000000"
    ATTRS{grxfsiz}=="GRXFSIZ = 0x00000306"
    ATTRS{gsnpsid}=="GSNPSID = 0x4f54280a"
    ATTRS{guid}=="GUID = 0x2708a000"
    ATTRS{gusbcfg}=="GUSBCFG = 0x20001700"
    ATTRS{hcd_frrem}=="HCD Dump Frame Remaining"
    ATTRS{hcddump}=="HCD Dump"
    ATTRS{hnp}=="HstNegScs = 0x0"
    ATTRS{hnpcapable}=="HNPCapable = 0x1"
    ATTRS{hprt0}=="HPRT0 = 0x00001005"
    ATTRS{hptxfsiz}=="HPTXFSIZ = 0x02000406"
    ATTRS{hsic_connect}=="HSIC Connect = 0x1"
    ATTRS{inv_sel_hsic}=="Invert Select HSIC = 0x0"
    ATTRS{mode}=="Mode = 0x1"
    ATTRS{mode_ch_tim_en}=="Mode Change Ready Timer Enable = 0x0"
    ATTRS{rd_reg_test}=="Time to read GNPTXFSIZ reg 10000000 times: 1760 msecs (176 jiffies)"
    ATTRS{regdump}=="Register Dump"
    ATTRS{regoffset}=="0xffffffff"
    ATTRS{regvalue}=="invalid offset"
    ATTRS{rem_wakeup_pwrdn}==""
    ATTRS{remote_wakeup}=="Remote Wakeup Sig = 0 Enabled = 0 LPM Remote Wakeup = 0"
    ATTRS{spramdump}=="SPRAM Dump"
    ATTRS{srp}=="SesReqScs = 0x1"
    ATTRS{srpcapable}=="SRPCapable = 0x1"
    ATTRS{wr_reg_test}=="Time to write GNPTXFSIZ reg 10000000 times: 500 msecs (50 jiffies)"

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

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

[PascalHambourg]

Pourquoi avoir exécuté udevadm avec ces noms de périphériques ? Ce ne sont pas /dev/video0 et /dev/video1 dont tu veux fixer les noms ?

[bellad]

voila pour vode0 :

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/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.2/1-1.2.2:1.0/video4linux/video0':
    KERNEL=="video0"
    SUBSYSTEM=="video4linux"
    DRIVER==""
    ATTR{dev_debug}=="0"
    ATTR{index}=="0"
    ATTR{name}=="usbtv"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.2/1-1.2.2:1.0':
    KERNELS=="1-1.2.2:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="usbtv"
    ATTRS{authorized}=="1"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bInterfaceClass}=="ff"
    ATTRS{bInterfaceNumber}=="00"
    ATTRS{bInterfaceProtocol}=="ff"
    ATTRS{bInterfaceSubClass}=="00"
    ATTRS{bNumEndpoints}=="04"
    ATTRS{supports_autosuspend}=="0"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.2':
    KERNELS=="1-1.2.2"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="500mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0100"
    ATTRS{bmAttributes}=="80"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="6"
    ATTRS{devpath}=="1.2.2"
    ATTRS{devspec}=="  (null)"
    ATTRS{idProduct}=="3002"
    ATTRS{idVendor}=="1b71"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="fushicai"
    ATTRS{maxchild}=="0"
    ATTRS{product}=="usbtv007"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="removable"
    ATTRS{serial}=="300000000002"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="10"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2':
    KERNELS=="1-1.2"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="02"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="100mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0106"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="4"
    ATTRS{devpath}=="1.2"
    ATTRS{devspec}=="  (null)"
    ATTRS{idProduct}=="8500"
    ATTRS{idVendor}=="2101"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Action Star"
    ATTRS{maxchild}=="5"
    ATTRS{product}=="USB2.0 Hub"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="removable"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="66"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1':
    KERNELS=="1-1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="02"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="2mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0200"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="2"
    ATTRS{devpath}=="1"
    ATTRS{idProduct}=="9514"
    ATTRS{idVendor}=="0424"
    ATTRS{ltm_capable}=="no"
    ATTRS{maxchild}=="5"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="37"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1':
    KERNELS=="usb1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{authorized_default}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="0mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0414"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="1"
    ATTRS{devpath}=="0"
    ATTRS{idProduct}=="0002"
    ATTRS{idVendor}=="1d6b"
    ATTRS{interface_authorized_default}=="1"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Linux 4.14.70-v7+ dwc_otg_hcd"
    ATTRS{maxchild}=="1"
    ATTRS{product}=="DWC OTG Controller"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{serial}=="3f980000.usb"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="25"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb':
    KERNELS=="3f980000.usb"
    SUBSYSTEMS=="platform"
    DRIVERS=="dwc_otg"
    ATTRS{busconnected}=="Bus Connected = 0x1"
    ATTRS{buspower}=="Bus Power = 0x1"
    ATTRS{bussuspend}=="Bus Suspend = 0x0"
    ATTRS{devspeed}=="Device Speed = 0x0"
    ATTRS{driver_override}=="(null)"
    ATTRS{enumspeed}=="Device Enumeration Speed = 0x1"
    ATTRS{fr_interval}=="Frame Interval = 0x1d4b"
    ATTRS{ggpio}=="GGPIO = 0x00000000"
    ATTRS{gnptxfsiz}=="GNPTXFSIZ = 0x01000306"
    ATTRS{gotgctl}=="GOTGCTL = 0x001c0001"
    ATTRS{gpvndctl}=="GPVNDCTL = 0x00000000"
    ATTRS{grxfsiz}=="GRXFSIZ = 0x00000306"
    ATTRS{gsnpsid}=="GSNPSID = 0x4f54280a"
    ATTRS{guid}=="GUID = 0x2708a000"
    ATTRS{gusbcfg}=="GUSBCFG = 0x20001700"
    ATTRS{hcd_frrem}=="HCD Dump Frame Remaining"
    ATTRS{hcddump}=="HCD Dump"
    ATTRS{hnp}=="HstNegScs = 0x0"
    ATTRS{hnpcapable}=="HNPCapable = 0x1"
    ATTRS{hprt0}=="HPRT0 = 0x00001005"
    ATTRS{hptxfsiz}=="HPTXFSIZ = 0x02000406"
    ATTRS{hsic_connect}=="HSIC Connect = 0x1"
    ATTRS{inv_sel_hsic}=="Invert Select HSIC = 0x0"
    ATTRS{mode}=="Mode = 0x1"
    ATTRS{mode_ch_tim_en}=="Mode Change Ready Timer Enable = 0x0"
    ATTRS{rd_reg_test}=="Time to read GNPTXFSIZ reg 10000000 times: 1420 msecs (142 jiffies)"
    ATTRS{regdump}=="Register Dump"
    ATTRS{regoffset}=="0xffffffff"
    ATTRS{regvalue}=="invalid offset"
    ATTRS{rem_wakeup_pwrdn}==""
    ATTRS{remote_wakeup}=="Remote Wakeup Sig = 0 Enabled = 0 LPM Remote Wakeup = 0"
    ATTRS{spramdump}=="SPRAM Dump"
    ATTRS{srp}=="SesReqScs = 0x1"
    ATTRS{srpcapable}=="SRPCapable = 0x1"
    ATTRS{wr_reg_test}=="Time to write GNPTXFSIZ reg 10000000 times: 490 msecs (49 jiffies)"

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

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

et pour video1 :

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/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.4/1-1.2.4:1.0/video4linux/video1':
    KERNEL=="video1"
    SUBSYSTEM=="video4linux"
    DRIVER==""
    ATTR{dev_debug}=="0"
    ATTR{index}=="0"
    ATTR{name}=="usbtv"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.4/1-1.2.4:1.0':
    KERNELS=="1-1.2.4:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="usbtv"
    ATTRS{authorized}=="1"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bInterfaceClass}=="ff"
    ATTRS{bInterfaceNumber}=="00"
    ATTRS{bInterfaceProtocol}=="ff"
    ATTRS{bInterfaceSubClass}=="00"
    ATTRS{bNumEndpoints}=="04"
    ATTRS{supports_autosuspend}=="0"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.4':
    KERNELS=="1-1.2.4"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="500mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0100"
    ATTRS{bmAttributes}=="80"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="7"
    ATTRS{devpath}=="1.2.4"
    ATTRS{devspec}=="  (null)"
    ATTRS{idProduct}=="3002"
    ATTRS{idVendor}=="1b71"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="fushicai"
    ATTRS{maxchild}=="0"
    ATTRS{product}=="usbtv007"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="removable"
    ATTRS{serial}=="300000000002"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="10"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2':
    KERNELS=="1-1.2"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="02"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="100mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0106"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="4"
    ATTRS{devpath}=="1.2"
    ATTRS{devspec}=="  (null)"
    ATTRS{idProduct}=="8500"
    ATTRS{idVendor}=="2101"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Action Star"
    ATTRS{maxchild}=="5"
    ATTRS{product}=="USB2.0 Hub"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="removable"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="66"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1':
    KERNELS=="1-1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="02"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="2mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0200"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="2"
    ATTRS{devpath}=="1"
    ATTRS{idProduct}=="9514"
    ATTRS{idVendor}=="0424"
    ATTRS{ltm_capable}=="no"
    ATTRS{maxchild}=="5"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="37"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb/usb1':
    KERNELS=="usb1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{authorized_default}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="0mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0414"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="1"
    ATTRS{devpath}=="0"
    ATTRS{idProduct}=="0002"
    ATTRS{idVendor}=="1d6b"
    ATTRS{interface_authorized_default}=="1"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Linux 4.14.70-v7+ dwc_otg_hcd"
    ATTRS{maxchild}=="1"
    ATTRS{product}=="DWC OTG Controller"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{serial}=="3f980000.usb"
    ATTRS{speed}=="480"
    ATTRS{urbnum}=="25"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/platform/soc/3f980000.usb':
    KERNELS=="3f980000.usb"
    SUBSYSTEMS=="platform"
    DRIVERS=="dwc_otg"
    ATTRS{busconnected}=="Bus Connected = 0x1"
    ATTRS{buspower}=="Bus Power = 0x1"
    ATTRS{bussuspend}=="Bus Suspend = 0x0"
    ATTRS{devspeed}=="Device Speed = 0x0"
    ATTRS{driver_override}=="(null)"
    ATTRS{enumspeed}=="Device Enumeration Speed = 0x1"
    ATTRS{fr_interval}=="Frame Interval = 0x1d4b"
    ATTRS{ggpio}=="GGPIO = 0x00000000"
    ATTRS{gnptxfsiz}=="GNPTXFSIZ = 0x01000306"
    ATTRS{gotgctl}=="GOTGCTL = 0x001c0001"
    ATTRS{gpvndctl}=="GPVNDCTL = 0x00000000"
    ATTRS{grxfsiz}=="GRXFSIZ = 0x00000306"
    ATTRS{gsnpsid}=="GSNPSID = 0x4f54280a"
    ATTRS{guid}=="GUID = 0x2708a000"
    ATTRS{gusbcfg}=="GUSBCFG = 0x20001700"
    ATTRS{hcd_frrem}=="HCD Dump Frame Remaining"
    ATTRS{hcddump}=="HCD Dump"
    ATTRS{hnp}=="HstNegScs = 0x0"
    ATTRS{hnpcapable}=="HNPCapable = 0x1"
    ATTRS{hprt0}=="HPRT0 = 0x00001005"
    ATTRS{hptxfsiz}=="HPTXFSIZ = 0x02000406"
    ATTRS{hsic_connect}=="HSIC Connect = 0x1"
    ATTRS{inv_sel_hsic}=="Invert Select HSIC = 0x0"
    ATTRS{mode}=="Mode = 0x1"
    ATTRS{mode_ch_tim_en}=="Mode Change Ready Timer Enable = 0x0"
    ATTRS{rd_reg_test}=="Time to read GNPTXFSIZ reg 10000000 times: 1760 msecs (176 jiffies)"
    ATTRS{regdump}=="Register Dump"
    ATTRS{regoffset}=="0xffffffff"
    ATTRS{regvalue}=="invalid offset"
    ATTRS{rem_wakeup_pwrdn}==""
    ATTRS{remote_wakeup}=="Remote Wakeup Sig = 0 Enabled = 0 LPM Remote Wakeup = 0"
    ATTRS{spramdump}=="SPRAM Dump"
    ATTRS{srp}=="SesReqScs = 0x1"
    ATTRS{srpcapable}=="SRPCapable = 0x1"
    ATTRS{wr_reg_test}=="Time to write GNPTXFSIZ reg 10000000 times: 490 msecs (49 jiffies)"

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

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

je ne vois pas grande différence , mais je n’ai pas l’œil affuté

[PascalHambourg]

Comme déjà dit plus haut, la seule différence est dans le chemin de connexion USB.
Je ne suis pas spécialiste des règles udev, mais d’après ce que j’ai lu on ne peut pas renommer les périphériques présents dans /dev, seulement les interfaces réseau (qui ne sont pas des périphériques au sens Unix et ne sont donc pas dans /dev). On peut par contre créer un lien symbolique (symlink) de nom fixe qui pointe vers le bon périphérique de nom variable.

Par exemple dans un fichier /etc/udev/rules.d/video.rules

ACTION=="add", KERNEL=="video*", SUBSYSTEM=="video4linux", DRIVERS=="usbtv", SUBSYSTEMS=="usb", ATTRS{idProduct}=="3002", ATTRS{idVendor}=="1b71", KERNELS=="1-1.2.2:1.0", SYMLINK+="videoA"

ACTION=="add", KERNEL=="video*", SUBSYSTEM=="video4linux", DRIVERS=="usbtv", SUBSYSTEMS=="usb", ATTRS{idProduct}=="3002", ATTRS{idVendor}=="1b71", KERNELS=="1-1.2.4:1.0", SYMLINK+="videoB"

Cela devrait créer les liens symboliques /dev/videoA et /dev/videoB pointant chacun vers le périphérique connecté au port USB correspondant.
Le choix des critères est globalement arbitraire, on peut en choisir d’autres.

[bellad]

merci PascalHambourg,
je testerai ça la semaine prochaine

[bellad]

bon j’ai essayé , pas concluant il ne fait pas de symlink , mais j’ai un autre probleme plus important ,
pour l’entrée video j’utilise usbtv007 , bien reconnu par debian 9.5 , quand je fais :
ffmpeg -f v4l2 -standard PAL -thread_queue_size 512 -i /dev/video0 -f alsa -thread_queue_size 512 -i hw:0,0 -vcodec libx264 -preset superfast -crf 25 -s 640x480 -r 25 -aspect 16:9 -acodec libmp3lame -b:a 128k -channels 2 -ar 48000 out_0001.mkv
pas de probleme ça fonctionne , mais si j’utilise zoneminder , il me fait kernel panic
j’ai cherché sur le net rien trouvé , je suis bloqué !!!
merci

[PascalHambourg]

Il y avait une faute de frappe dans mes lignes pour créer les symlinks : il fallait écrire SUBSYSTEMS=="usb" au lieu de SUBSYSTEMS="usb" (== pour une comparaison au lieu de = pour une affectation).