QTQR & ZBAR
Impossible de visionner un QR code depuis la webcam
Logiciels / Graphisme photo et vidéo
clicere83 Membre non connecté
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- Inscrit le : 29/04/2013
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J'ai installé l'outil QTQR et l'outil ZBAR pour lire les QR codes depuis ma webcam.
Voici la log , sous la console, lors de l'essai de lecture :
[xxxxxxxx@localhost ~]$ qtqr
Xlib: extension "RANDR" missing on display ":0".
QPixmap::scaled: Pixmap is a null pixmap
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
v4l2_dq: WARNING: read() size mismatch: 0xffffffffffffffff != 0x3f4800
QPixmap::scaled: Pixmap is a null pixmap
Traceback (most recent call last):
File "/usr/bin/qtqr", line 642, in decodeWebcam
qr.decode_webcam(device=device)
File "/usr/lib/python2.7/site-packages/qrtools.py", line 177, in decode_webcam
proc.init(device)
zbar.UnsupportedError: WARNING: zbar processor in _zbar_v4l2_probe():
unsupported request: v4l2 device does not support usable CAPTURE
QPixmap::scaled: Pixmap is a null pixmap
Traceback (most recent call last):
File "/usr/bin/qtqr", line 642, in decodeWebcam
qr.decode_webcam(device=device)
File "/usr/lib/python2.7/site-packages/qrtools.py", line 177, in decode_webcam
proc.init(device)
zbar.SystemError: ERROR: zbar processor in v4l2_probe_iomode():
system error: querying streaming mode (VIDIOC_REQBUFS): Périphérique ou ressource occupé (16)
Ma webcam est bien détectée dans la liste du matériel, elle est reconnue par l'outil QTQR et elle est bien présente dans la liste lsusb. Elle fonctionne bien avec l'outil cheese
Avez-vous une idée du problème ?
Édité par clicere83 Le 28/12/2019 à 17h15
steven Membre non connecté
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- Inscrit le : 18/05/2018
Perso (mageia7 plasma(kde) 64 bits), zbar ne fonctionne pas tout seul (si je lance juste zbar , j'obtient..... que dalle 8O)...
en fait pour le faire fonctionner, je dois exécuter :
- zbarcam
OU
- zbarcam-gtk
OU
- zbarimg %U
MAIS en konsole
Parce que l'interface graphic.... n'a jamais vraiment fonctionné....
zbarcam affiche & scan ce que vois la cam.
zbarcam-gtk... bon courage
zbarimg ...
C'est les seuls info's que je peu te donner, desolé...
en espèrent que cà te permettras "d'avancer"...
No Comment ... 
Merci de ne pas 'rebondir' sur mes post's Censor => 2025
Merci de ne pas 'rebondir' sur mes post's Censor => 2025
clicere83 Membre non connecté
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QTQR permet de lancer ZBAR en mode graphique, il se lance, mais j'ai une fenêtre totalement noir, comme si il ne trouvait pas la webcam, alors qu'elle est bien reconnue par le système et les applications dédiées.
Je viens de tester zbarcam, j'obtiens une fenêtre totalement noire avec les mêmes messages d'erreur dans la console.
Pour zbarcam-gtk, même résultat, la webcam est bien détectée, mais fenêtre totalement noire et les mêmes messages d'erreur.
nic80 Membre non connecté
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Modérateur
Il faut lancer qtqr de manière particulière...
Cela avait été évoqué dans un post... mais je ne l' ai pas retrouvé pour le moment.
Edit: c' est ce post ici
Edit 2: encore que la première ligne me laisse penser que le problème d' outil de configuration d' écran est peut être lié à ce message...
Édité par nic80 Le 28/12/2019 à 22h00
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