2008/11/6 Ilyes Gouta <[EMAIL PROTECTED]>: > Hi, > >> I belive Lukas posted the reply he received from Hans a couple of >> weeks ago, basically it mounted up to that a lot of applications >> misinterpret the v4l2 specs which make them break when libv4l is used. > > That's true, especially when interpreting the S_FMT and TRY_FMT > semantics. I observed this issue in xawtv and mplayer when writing > LiveCam. What about posting bug reports for those applications? > >> The main forum for discussing libv4l is currently the video4linux >> list, available at >> https://www.redhat.com/mailman/listinfo/video4linux-list but my >> feeling that a dedicated mailing list would be more appropriate. > > Right now and personally, I'm interested in the image processing > routines/capabilities of libv4l more than the v4l1 emulation layer and > all that stuff. We need some real heavy content and contribution to > justify the creation of a new mailing-list, IMHO. I think that > video4linux-list is enough for the moment. (and remember, don't > fragment).
Yes, that's true, but this mailing list shouldn't be the medium for these kinds of libv4l discussions. (I've added Hans as a CC). > > Here is what I like to see implemented in libv4l: > > 1. All the various bayer format conversion (starting byte can be blue, > green or red) to RGB > 2. YCrCb to RGB and vice-versa format convertion > 3. Fast image resize using bilinear (to scale-down) and lancoz (to > scale-up) interpolation > 4. Efficient auto white balacing > 5. Picture sharpening > 6. Noise removal through low-pass filtering > 7. Exposure correction > 8. Gamma correction > 9. JPEG decompression > 10. All this both in two flavors, plain C (for compatibility) and > highly optimized platform-dependent, assembler code. > > Any other features you would like to add? > Aren't some of these features already implemented? Regards, Erik > Regards, > Ilyes Gouta. > >> Regards, >> Erik >> >> >> >>> Regards, >>> Ilyes Gouta. >>> >>> On Wed, Nov 5, 2008 at 10:40 PM, Lukáš Karas <[EMAIL PROTECTED]> wrote: >>>>> >>>>>Hi, >>>>> >>>>>libv4l can be a very important and reusable component for a wide range >>>>>of software and my point is that it shouldn't be fragmented. Ideally >>>>>it should host all the common user-space code for video processing >>>>>such as format conversion, image processing, all the routines that can >>>>>be efficiently tuned using the arch. specific features such as MMX/SSE >>>>>on x86 and Altivec on PowerPC, etc. Guys, just don't fragment that >>>>>library and keep it in one place and stick to the V4L2 spec because >>>>>everything else is buggy. >>>>> >>>>>Regards, >>>>>Ilyes Gouta. >>>>> >>>> >>>> Hi Ilyes, >>>> >>>> maintaining of libv4l is Hans de Goede now. I would like come in to >>>> develop process >>>> of this library, but Hans push any patch, that I post him :( >>>> Yes I know, some my patches wasn't pretty at first... >>>> >>>> And... Hans probably isn't proponent for evade bugs of other applications >>>> in library. >>>> >>>> What is your suggestion? >>>> >>>> Regards, >>>> Lukas >>>> >>>> >>>>>On Wed, Nov 5, 2008 at 5:45 PM, Daniele Cruciani <[EMAIL PROTECTED]> wrote: >>>>>> >>>>>> Sorry, I found it in ubuntu intrepid repository >>>>>> maintained by Gregor Jasny <[EMAIL PROTECTED]> >>>>>> >>>>>> I do not know if there is a package in debian >>>>>> >>>>>>> -------Original Message------- >>>>>>> From: Ilyes Gouta <[EMAIL PROTECTED]> >>>>>>> Subject: Re: [M560x-driver-devel] [M560x-driver-support] libv4l has a >>>>>>> debian mentor... >>>>>>> Sent: 05 Nov '08 17:27 >>>>>>> >>>>>>> Hi folks, >>>>>>> >>>>>>> Who is maintaining libv4l right now? >>>>>>> >>>>>>> Regards, >>>>>>> Ilyes Gouta. >>>>>>> >>>>>>> On Wed, Nov 5, 2008 at 4:12 PM, Laurent BARRAILLE <[EMAIL PROTECTED]> >>>>>>> wrote: >>>>>>> > Hi, >>>>>>> > >>>>>>> > Read >>>>>>> > >>>>>>> > http://m560x-driver.wiki.sourceforge.net/libv4l+Ubuntu+Intrepid >>>>>>> > >>>>>>> > >>>>>>> > Regards >>>>>>> > >>>>>>> > Laurent >>>>>>> > >>>>>>> > >>>>>>> > Le mercredi 05 novembre 2008 ŕ 15:08 +0100, Daniele Cruciani a écrit >>>>>>> : >>>>>>> >> package is not there anymore, where can I found it? >>>>>>> >> (I am in ubuntu 8.10) >>>>>>> >> >>>>>>> >> >>>>>>> >> Thanks, >>>>>>> >> Daniele >>>>>>> >> >>>>>>> >> >>>>>>> >> > -------Original Message------- >>>>>>> >> > From: Jérémy Lal <[EMAIL PROTECTED]> >>>>>>> >> > Subject: [M560x-driver-support] libv4l has a debian mentor... >>>>>>> >> > Sent: 17 Aug '08 15:14 >>>>>>> >> > >>>>>>> >> > for those waiting for a debian package, you can build a >>>>>>> preversion this way : >>>>>>> >> > >>>>>>> >> > dget >>>>>>> http://mentors.debian.net/debian/pool/main/l/libv4l/libv4l_0.4.0-1.dsc >>>>>>> >> > dpkg-source -x libv4l_0.4.0-1.dsc >>>>>>> >> > cd libv4l-0.4.0/ >>>>>>> >> > dpkg-buildpackage -rfakeroot >>>>>>> >> > cd .. >>>>>>> >> > dpkg -i libv4l_0.4.0-1_i386.deb >>>>>>> >> > >>>>>>> >> > that being said, you still need to set these variables somewhere >>>>>>> : >>>>>>> >> > >>>>>>> >> > export LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so >>>>>>> >> > export LD_LIBRARY_PATH=/usr/lib/libv4l >>>>>>> >> > >>>>>>> >> > or else it won't work. >>>>>>> >> > >>>>>>> >> > i just tested it with skype, and it works. >>>>>>> >> > other software doesn't work because >>>>>>> >> > VIDIOCGCAP -- could not get camera capabilities, exiting..... >>>>>>> >> > >>>>>>> >> > >>>>>>> >> > >>>>>>> >> > >>>>>>> ------------------------------------------------------------------------- >>>>>>> >> > This SF.Net email is sponsored by the Moblin Your Move >>>>>>> Developer's challenge >>>>>>> >> > Build the coolest Linux based applications with Moblin SDK & win >>>>>>> great prizes >>>>>>> >> > Grand prize is a trip for two to an Open Source event anywhere >>>>>>> in the world >>>>>>> >> > http://moblin-contest.org/redirect.php?banner_id=100&url=/ >>>>>>> >> > _______________________________________________ >>>>>>> >> > M560x-driver-support mailing list >>>>>>> >> > [EMAIL PROTECTED] >>>>>>> >> > https://lists.sourceforge.net/lists/listinfo/m560x-driver-support >>>>>>> >> > >>>>>>> >> >>>>>>> >> >>>>>>> ------------------------------------------------------------------------- >>>>>>> >> This SF.Net email is sponsored by the Moblin Your Move Developer's >>>>>>> challenge >>>>>>> >> Build the coolest Linux based applications with Moblin SDK & win >>>>>>> great prizes >>>>>>> >> Grand prize is a trip for two to an Open Source event anywhere in >>>>>>> the world >>>>>>> >> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >>>>>>> >> _______________________________________________ >>>>>>> >> M560x-driver-support mailing list >>>>>>> >> [EMAIL PROTECTED] >>>>>>> >> https://lists.sourceforge.net/lists/listinfo/m560x-driver-support >>>>>>> > >>>>>>> > >>>>>>> > >>>>>>> ------------------------------------------------------------------------- >>>>>>> > This SF.Net email is sponsored by the Moblin Your Move Developer's >>>>>>> challenge >>>>>>> > Build the coolest Linux based applications with Moblin SDK & win >>>>>>> great prizes >>>>>>> > Grand prize is a trip for two to an Open Source event anywhere in >>>>>>> the world >>>>>>> > http://moblin-contest.org/redirect.php?banner_id=100&url=/ >>>>>>> > _______________________________________________ >>>>>>> > M560x-driver-devel mailing list >>>>>>> > [email protected] >>>>>>> > https://lists.sourceforge.net/lists/listinfo/m560x-driver-devel >>>>>>> > >>>>>>> >>>>>> >>>>>------------------------------------------------------------------------- >>>>>This SF.Net email is sponsored by the Moblin Your Move Developer's >>>>>challenge >>>>>Build the coolest Linux based applications with Moblin SDK & win great >>>>>prizes >>>>>Grand prize is a trip for two to an Open Source event anywhere in the world >>>>>http://moblin-contest.org/redirect.php?banner_id=100&url=/ >>>>>_______________________________________________ >>>>>M560x-driver-devel mailing list >>>>>[email protected] >>>>>https://lists.sourceforge.net/lists/listinfo/m560x-driver-devel >>>>> >>>> >>>> >>>> ------------------------------------------------------------------------- >>>> This SF.Net email is sponsored by the Moblin Your Move Developer's >>>> challenge >>>> Build the coolest Linux based applications with Moblin SDK & win great >>>> prizes >>>> Grand prize is a trip for two to an Open Source event anywhere in the world >>>> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >>>> _______________________________________________ >>>> M560x-driver-devel mailing list >>>> [email protected] >>>> https://lists.sourceforge.net/lists/listinfo/m560x-driver-devel >>>> >>> ------------------------------------------------------------------------- >>> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge >>> Build the coolest Linux based applications with Moblin SDK & win great >>> prizes >>> Grand prize is a trip for two to an Open 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