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Frangueliz

Capture video cassette VHS dazzle dvc 100

Bonjour à tous,

J'essaie sans succès de sauvegarder mes cassettes VHS en fichier numériques grâce à un Dazzle DVD recorder dvc 100. Je l'ai dejà fait en 2013 et je n'avais pas eu de soucis, en suivant ce tutoriel et j'utilisais ubuntu 12.04.
Aujourd'hui j'ai besoin de transferer des cassettes, et en suivant le tutoriel je n'y arrive pas. la comande dmesg renvoie

[  341.504642] em2710/2820 #0: Identified as Pinnacle Dazzle DVC 90/100/101/107 / Kaiser Baas Video to DVD maker / Kworld DVD Maker 2 / Plextor ConvertX PX-AV100U (card=9)
[  341.504645] em2710/2820 #0: analog set to isoc mode.
[  341.504690] em28xx audio device (2304:021a): interface 1, class 1
[  341.504708] em28xx audio device (2304:021a): interface 2, class 1
[  341.504754] usbcore: registered new interface driver em28xx
[  341.547753] usbcore: registered new interface driver snd-usb-audio
[  341.555183] em2710/2820 #0: Registering V4L2 extension
[  341.951469] saa7115 13-0025: saa7113 found @ 0x4a (em2710/2820 #0)
[  342.722967] em2710/2820 #0: Config register raw data: 0x12
[  342.746850] em2710/2820 #0: AC97 vendor ID = 0x83847650
[  342.758883] em2710/2820 #0: AC97 features = 0x6a90
[  342.758888] em2710/2820 #0: Empia 202 AC97 audio processor detected
[  345.054685] em2710/2820 #0: V4L2 video device registered as video0
[  345.054690] em2710/2820 #0: V4L2 extension successfully initialized

et

more /proc/asound/cards

0 [MID            ]: HDA-Intel - HDA Intel MID
                      HDA Intel MID at 0xf9ff8000 irq 29
 1 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xfbc7c000 irq 17
 2 [DVC100         ]: USB-Audio - DVC100
                      Pinnacle Systems GmbH DVC100 at usb-0000:00:1d.0-1.3, high
 speed

J'en déduit que la vidéo se situe sur /dev/video0 et l'audio sur /dev/dsp2 . Mais lorsque je tape la commande pour l'acquisition vidéo elle renvoie une erreur,

mplayer tv:// -tv \
driver=v4l2:norm=SECAM:audiorate=44100:immediatemode=0:forceaudio:adevice=/dev/dsp1

MPlayer 1.2.1 (Debian), built with gcc-5.3.1 (C) 2000-2016 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing tv://.
TV file format detected.
Selected driver: v4l2
 name: Video 4 Linux 2 input
 author: Martin Olschewski <olschewski@zpr.uni-koeln.de>
 comment: first try, more to come ;-)
Selected device: Pinnacle Dazzle DVC 90/100/101/
 Capabilities:  video capture  audio  read/write  streaming
 supported norms: 0 = NTSC; 1 = NTSC-M; 2 = NTSC-M-JP; 3 = NTSC-M-KR; 4 = NTSC-443; 5 = PAL; 6 = PAL-BG; 7 = PAL-H; 8 = PAL-I; 9 = PAL-DK; 10 = PAL-M; 11 = PAL-N; 12 = PAL-Nc; 13 = PAL-60; 14 = SECAM; 15 = SECAM-B; 16 = SECAM-G; 17 = SECAM-H; 18 = SECAM-DK; 19 = SECAM-L; 20 = SECAM-Lc;
 inputs: 0 = Composite1; 1 = S-Video;
 Current input: 0
 Current format: YUYV
v4l2: ioctl set format failed: Invalid argument
v4l2: ioctl set format failed: Invalid argument
v4l2: ioctl set format failed: Invalid argument
Selected input hasn't got a tuner!
Unable to open '/dev/dsp2': No such file or directory
Unable to open '/dev/dsp2': No such file or directory
Unable to open '/dev/dsp2': No such file or directory
v4l2: 0 frames successfully processed, 0 frames dropped.


Exiting... (End of file)

j'ai recherché sur internet où j'ai vu qu'il fallait remplacer /dev/dsp2 par hw.2,0 mais cela me renvoie la meme erreur. Auriez vous quelques idées pouvant me débloquer ?
Merci de votre aide