# Rules easycap

**URL:** <https://www.debian-fr.org/t/rules-easycap/77658>\
**Category:** Support Debian\
**Created:** [Octobre 1, 2018, 12:21 UTC](https://www.debian-fr.org/t/rules-easycap/77658 "2018-10-01T12:21:20Z")\
**Posts on this page:** 16\
**Page:** 1

<div class="post-metadata">

**Author:** ![bellad](https://www.debian-fr.org/letter_avatar_proxy/v4/letter/b/e274bd/32.png) [@bellad](https://www.debian-fr.org/u/bellad)\
**Post date:** [Octobre 1, 2018, 12:21 UTC](https://www.debian-fr.org/t/rules-easycap/77658/1 "2018-10-01T12:21:20Z")

</div>

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 ?

```nohighlight
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

```

---

<div class="post-metadata">

**Author:** ![PascalHambourg](https://www.debian-fr.org/user_avatar/www.debian-fr.org/pascalhambourg/32/5837_2.png) [@PascalHambourg](https://www.debian-fr.org/u/PascalHambourg)\
**Post date:** [Octobre 1, 2018, 12:43 UTC](https://www.debian-fr.org/t/rules-easycap/77658/2 "2018-10-01T12:43:13Z")

</div>

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

---

<div class="post-metadata">

**Author:** ![bellad](https://www.debian-fr.org/letter_avatar_proxy/v4/letter/b/e274bd/32.png) [@bellad](https://www.debian-fr.org/u/bellad)\
**Post date:** [Octobre 1, 2018, 1:02 UTC](https://www.debian-fr.org/t/rules-easycap/77658/3 "2018-10-01T13:02:03Z")

</div>

oui , excuse

---

<div class="post-metadata">

**Author:** ![PascalHambourg](https://www.debian-fr.org/user_avatar/www.debian-fr.org/pascalhambourg/32/5837_2.png) [@PascalHambourg](https://www.debian-fr.org/u/PascalHambourg)\
**Post date:** [Octobre 1, 2018, 1:24 UTC](https://www.debian-fr.org/t/rules-easycap/77658/4 "2018-10-01T13:24:22Z")

</div>

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
```

---

<div class="post-metadata">

**Author:** ![anon29980398](https://www.debian-fr.org/letter_avatar_proxy/v4/letter/a/f4b2a3/32.png) [@anon29980398](https://www.debian-fr.org/u/anon29980398)\
**Post date:** [Octobre 1, 2018, 1:51 UTC](https://www.debian-fr.org/t/rules-easycap/77658/5 "2018-10-01T13:51:09Z")

</div>

Bonjour **bellad**

> [@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 «&nbsp; **Video Grabber** &nbsp;» :  
[linuxquestions.org : Udev Rules To Differentiate Between Multiple Identical Devices](https://www.linuxquestions.org/questions/linux-general-1/udev-rules-to-differentiate-between-multiple-identical-devices-822879/)

---

<div class="post-metadata">

**Author:** ![bellad](https://www.debian-fr.org/letter_avatar_proxy/v4/letter/b/e274bd/32.png) [@bellad](https://www.debian-fr.org/u/bellad)\
**Post date:** [Octobre 2, 2018, 7:04 UTC](https://www.debian-fr.org/t/rules-easycap/77658/6 "2018-10-02T07:04:40Z")

</div>

> [@PascalHambourg](#):
>
> `--attribute-walk --name=/dev/`

```plaintext
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

```plaintext
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"

```

---

<div class="post-metadata">

**Author:** ![PascalHambourg](https://www.debian-fr.org/user_avatar/www.debian-fr.org/pascalhambourg/32/5837_2.png) [@PascalHambourg](https://www.debian-fr.org/u/PascalHambourg)\
**Post date:** [Octobre 3, 2018, 7:25 UTC](https://www.debian-fr.org/t/rules-easycap/77658/7 "2018-10-03T07:25:41Z")

</div>

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 ?

---

<div class="post-metadata">

**Author:** ![bellad](https://www.debian-fr.org/letter_avatar_proxy/v4/letter/b/e274bd/32.png) [@bellad](https://www.debian-fr.org/u/bellad)\
**Post date:** [Octobre 3, 2018, 10:20 UTC](https://www.debian-fr.org/t/rules-easycap/77658/8 "2018-10-03T10:20:29Z")

</div>

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

---

<div class="post-metadata">

**Author:** ![PascalHambourg](https://www.debian-fr.org/user_avatar/www.debian-fr.org/pascalhambourg/32/5837_2.png) [@PascalHambourg](https://www.debian-fr.org/u/PascalHambourg)\
**Post date:** [Octobre 3, 2018, 2:41 UTC](https://www.debian-fr.org/t/rules-easycap/77658/9 "2018-10-03T14:41:45Z")

</div>

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

---

<div class="post-metadata">

**Author:** ![bellad](https://www.debian-fr.org/letter_avatar_proxy/v4/letter/b/e274bd/32.png) [@bellad](https://www.debian-fr.org/u/bellad)\
**Post date:** [Octobre 4, 2018, 7:02 UTC](https://www.debian-fr.org/t/rules-easycap/77658/10 "2018-10-04T07:02:14Z")

</div>

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

```

et

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

```

pour le premier :

```nohighlight
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 :

```nohighlight
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==""

```

---

<div class="post-metadata">

**Author:** ![PascalHambourg](https://www.debian-fr.org/user_avatar/www.debian-fr.org/pascalhambourg/32/5837_2.png) [@PascalHambourg](https://www.debian-fr.org/u/PascalHambourg)\
**Post date:** [Octobre 4, 2018, 11:46 UTC](https://www.debian-fr.org/t/rules-easycap/77658/11 "2018-10-04T11:46:05Z")

</div>

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

---

<div class="post-metadata">

**Author:** ![bellad](https://www.debian-fr.org/letter_avatar_proxy/v4/letter/b/e274bd/32.png) [@bellad](https://www.debian-fr.org/u/bellad)\
**Post date:** [Octobre 4, 2018, 12:01 UTC](https://www.debian-fr.org/t/rules-easycap/77658/12 "2018-10-04T12:01:19Z")

</div>

voila pour vode0 :

```nohighlight
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 :

```nohighlight
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

---

<div class="post-metadata">

**Author:** ![PascalHambourg](https://www.debian-fr.org/user_avatar/www.debian-fr.org/pascalhambourg/32/5837_2.png) [@PascalHambourg](https://www.debian-fr.org/u/PascalHambourg)\
**Post date:** [Octobre 4, 2018, 12:49 UTC](https://www.debian-fr.org/t/rules-easycap/77658/13 "2018-10-04T12:49:56Z")

</div>

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.

---

<div class="post-metadata">

**Author:** ![bellad](https://www.debian-fr.org/letter_avatar_proxy/v4/letter/b/e274bd/32.png) [@bellad](https://www.debian-fr.org/u/bellad)\
**Post date:** [Octobre 5, 2018, 2:53 UTC](https://www.debian-fr.org/t/rules-easycap/77658/14 "2018-10-05T14:53:04Z")

</div>

merci PascalHambourg,  
je testerai ça la semaine prochaine

---

<div class="post-metadata">

**Author:** ![bellad](https://www.debian-fr.org/letter_avatar_proxy/v4/letter/b/e274bd/32.png) [@bellad](https://www.debian-fr.org/u/bellad)\
**Post date:** [Octobre 11, 2018, 11:07 UTC](https://www.debian-fr.org/t/rules-easycap/77658/15 "2018-10-11T11:07:33Z")

</div>

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

---

<div class="post-metadata">

**Author:** ![PascalHambourg](https://www.debian-fr.org/user_avatar/www.debian-fr.org/pascalhambourg/32/5837_2.png) [@PascalHambourg](https://www.debian-fr.org/u/PascalHambourg)\
**Post date:** [Octobre 11, 2018, 11:15 UTC](https://www.debian-fr.org/t/rules-easycap/77658/16 "2018-10-11T11:15:44Z")

</div>

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).