Since the camera is appearing upside down there might be something wrong with the operating settings.

I did find some references on how to change this setting:

• "add the entry -flip to the list of arguments under preview>configure preview" via [community.linuxmint.com/tutorial/view/219]
• http://forums.linuxmint.com/viewtopic.php?f=49&t=33109

guigs2 said

Since the camera is appearing upside down there might be something wrong with the operating settings. I did find some references on how to change this setting:

• "add the entry -flip to the list of arguments under preview>configure preview" via [community.linuxmint.com/tutorial/view/219]
• http://forums.linuxmint.com/viewtopic.php?f=49&t=33109

Thanks for your suggestion. I think I have to procede in the same way I did with skype (the same suggested in the links): LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so app_name

but in the case of Firefox Hello I don't know what to write in the "app_name"

Chamaeleon said

guigs2 said

Since the camera is appearing upside down there might be something wrong with the operating settings. I did find some references on how to change this setting:

• "add the entry -flip to the list of arguments under preview>configure preview" via [community.linuxmint.com/tutorial/view/219]
• http://forums.linuxmint.com/viewtopic.php?f=49&t=33109

Thanks for your suggestion. I think I have to procede in the same way I did with skype (the same suggested in the links): LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so app_name

but in the case of Firefox Hello I don't know what to write in the "app_name"

(as suggested in the last post here for example: http://community.skype.com/t5/Linux-archive/Camera-Upside-Down/td-p/934244 )

Hi, I asked in the mozilla irc channel #media and had some help:

the app_name should just be "firefox"

/usr/bin/firefox

However it was noted also that this looks "like a driver/lib issue. So it probably works for any program which accesses the camera (as long as the program hasn’t the libv4l build in)."

I tried to create a new pre-load file (as it's described here) substituting the app_name part with "/usr/bin/firefox"

but in this case there is no change (still upside down camera)

In the terminal after starting firefox I get:

ERROR: ld.so: object '/usr/lib32/libv4l/v4l1compat.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.

Hi Chamaeleon, Thank you for posting back. It sounds like a driver issue, is there another driver available for the camera being used?

Mmmm.... I don't know....since now I never had any problem (except for the skype issue which, in any case, I solved). For example Google talk is always very smooth. Once the plug-in is installed never presented upside down problems

Skype and Gtalk for linux are 64bit by default, but Firefox is a 32bit program (for now). LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so won't fix this issue in Hello because its a 64bit library.

Using /usr/lib32/libv4l/v4l1compat.so is the right idea, but that error "cannot open shared object file" is coming from the kernel and not from Firefox. "Cannot open shared object file" means the file isn't there or that your user doesn't have permission to read it. Double check the path and permissions for /usr/lib32/libv4l/v4l1compat.so and then (after verifying that the library is there and has the correct permissions) try running: LD_PRELOAD=/usr/lib32/libv4l/v4l1compat.so /usr/bin/firefox

Error found! Effectively I was using the wrong v4l1 file (I didn't remember firefox is only 32 bit!). The permissions and all the rest were ok...

Thanks a lot for all the inputs!!