Page 8 of 16 FirstFirst ... 456789101112 ... LastLast
Results 71 to 80 of 158
  1. Collapse Details
    #71
    Junior Member
    Join Date
    Jan 2012
    Posts
    7
    Default
    Quote Originally Posted by someone1.00 View Post
    I want to run kernel under qemu. Since the kernel sources already published it can be done by anybody. So run the kernel under emulator can help.
    About the firmware. I need to find a way to modify it and pass all checksums test and internal integrity. I'd like to change a version first. No any code modification just a simple repacking with small text changes.
    I'm just wondering how this will help? Looking at the sources, almost everything camera-specific seems to live in user land (and thus sources don't have to be distributed for them). The kernel itself looks pretty standard.


    Reply With Quote
     

  2. Collapse Details
    #72
    Default
    This helps with tracing. The kernel itself will be a step forward.
    And about camera specific drivers. They cannot run in user mode. All the drivers resides in rootfs that is visible on my video. All of them shold be replaced with stubs in the future to trace user mode modules. Generally this helps to check suggestions without camera at all. Not an easy way but without lot of free money is the only way to try any idea. Camera has no gdb inside. At least in firmware.
    if this kernel is an ordinal one like in any hacked arm router it should not be difficult to compile it and run under the emulator. But it's not completely the same.
    One side question. Can they copyright the kernel? They added some changes to it but general license cannot be changed...
    Last edited by someone1.00; 08-02-2012 at 01:54 AM.


    Reply With Quote
     

  3. Collapse Details
    #73
    Member sibero80's Avatar
    Join Date
    Jun 2008
    Location
    Colombia
    Posts
    32
    Default
    I asked out in the Magic Lanter forum about the legality of reverse engeneering, their answer is VERY conforting:


    http://www.magiclantern.fm/forum/index.php?topic=1857.0
    Quote
    But, what are the risks for a developer when reverse engeneering a camera's firmware?



    First and foremost, you risk bricking your camera.

    The following comes with the very standard "I am not a lawyer" disclaimer.

    As far as legal risks go you shouldn't have to worry about the DMCA, that only refers to copyright protection circumvention. Because there are no copyright protection mechanisms included on the camera, you shouldn't be afraid to reverse engineer anything. Check out:
    http://www.lawtechjournal.com/articles/2004/03_040907_hecht.php and especially read the paragraph starting with "Defining the limits of acceptable reverse engineering."

    You are not restricted by the DMCA, however, you are still bound by copyright law. Sony's code (in your case, basically anything not released via the GPL) is copyrighted, and you are not allowed to post it in any form, assembled, disassembled etc. For example, we don't host any firmware dumps of any cameras because they are copyrighted by Canon. We can, however, post instructions on how to dump, the firmware, and how to interpret and look at it.

    Quote
    On a side note, how similar/different is developing for canon and for sony?



    They are very different. Canon devices run on an embedded OS, either DryOS or VxWorks, and it looks like the Sony devices run on some form of Linux. Probably the only similarity is they probably both use an ARM processor.
    There is a pending question about the funding method I proposed, so lets see what he comes up with.


    Reply With Quote
     

  4. Collapse Details
    #74
    Junior Member
    Join Date
    Oct 2011
    Posts
    6
    Default
    I would also gladly donate to have more features on the 5N. It's a superb camera, and coupled with features similar to those of Magic Lantern (on Canon cameras), it would become one heck of a small beast!

    To my knowledge, Sony can't sue unless you're either infringing some of the copyrights (such as making any encrypted code openly available to the general public) or if you sell it (donations are allowed).

    Another similar case was that of jailbreaking Apple devices, and Apple lost that one.


    Reply With Quote
     

  5. Collapse Details
    #75
    Bronze Member
    Join Date
    Apr 2010
    Posts
    2,415
    Default
    It is good to see that discussion went into constructive way. Initially it had been slightly offroad.

    ML guys told you good things. I'll tell you almost the same. Want to add only that DCMA can be also used if you post some closed information, not only code.

    I think approach must be simple. Make small tool for one exact camera that proove that it will work. Simple text hack, as we did on Nikon is enough. It is 100% safe.

    After this we could seriously talk about bodies, and I'll be glad to help.


    Reply With Quote
     

  6. Collapse Details
    #76
    Senior Member
    Join Date
    Feb 2012
    Posts
    233
    Default
    Based on the talk here, I'd like to understand how one goes about modifying the functions of a camera by means of a software hack.

    Re. avchd/h264 bitrate - Will Sony have had a user interface which allows them to set frame rates, bitrates and codecs, changing them infinitely during development of the camera? In this case, will thay have chosen 24mb/s avchd for optimum file size/heat build up/system stability? If someone were to hack and write a user interface (operated via pc attached to camera via USB), would it be possible for the end user to adjust these paramters themselves? Change the background images used on the camera UI?, remove the crop and dials/rec time info which is displayed on screen during recording? - It is crazy because I have been doing some testing and if you set your camera to 3200iso and record a dark scene, then play it back straight after, the footage is a lot cleaner during recording than during playback afterwards - meaning the live view is fed before any compression takes place.

    also I am confused because I read on wikipedia that AVCHD is a maximum of 28mb/s bitrate. would the hack actually tweek the AVCHD codec into a modified form to allow higher bitrates? I assume the GH2 still outputs a AVCHD file? if not, is it now MJpeg? I think even 28mb/s during 25p would be a nice little gain over the current 24mb/s.


    As said before, I'd be happy to donate to this cause, it is both exciting in technical terms and interesting because a lot of the talk here is going right over my head. - I couldnt make sense of what was being done on Someone1.00's video a few pages ago.. looks deep

    As said by many before me. I am not looking for more detail - I like the look of the footage out of the camera as standard, and 4:2:2 is not that important to me either - a bonus for future green screen work maybe, but not a deal breaker. But a lovely compressed avchd file maybe increased to 35mb/s would be a welcome change and would I'd think help out in fighting against some of the macro blocking that can sometimes occur on less detailed areas when shooting quite complex of dynamic scenes.
    Last edited by richg101; 08-03-2012 at 04:43 PM.


    Reply With Quote
     

  7. Collapse Details
    #77
    Junior Member
    Join Date
    Jul 2012
    Posts
    4
    Default
    Right then. Ill start by saying I have actually been waiting for this for a long time, but all I can say now is that its do-able and I dont know what all the fuss was about ;) (I can say that because I had no part in it!!). Got a bit excited seeing it myself tonight. My job here is done and I am going to post something on here soon as he wont! Did I say I was a tiny bit excited????????

    edit: one of the tests was showing av 46mbps and topped out at 9 mins 23! little room, summer evening! Dark room with 1.8 50mm looked very nice.
    Last edited by mojod20; 08-04-2012 at 04:32 PM.


    Reply With Quote
     

  8. Collapse Details
    #78
    Senior Member rawfa's Avatar
    Join Date
    Aug 2005
    Location
    Rio de Janeiro
    Posts
    3,087
    Default
    Quote Originally Posted by mojod20 View Post
    Right then. Ill start by saying I have actually been waiting for this for a long time, but all I can say now is that its do-able and I dont know what all the fuss was about ;) (I can say that because I had no part in it!!). Got a bit excited seeing it myself tonight. My job here is done and I am going to post something on here soon as he wont! Did I say I was a tiny bit excited????????

    edit: one of the tests was showing av 46mbps and topped out at 9 mins 23! little room, summer evening! Dark room with 1.8 50mm looked very nice.
    Dude, if you´re pulling our legs they will be a bounty on your head. Post post post!!! 46bmps from a NEX would be freaking sweaaaat!


    Reply With Quote
     

  9. Collapse Details
    #79
    Junior Member
    Join Date
    Jul 2010
    Posts
    26
    Default
    A specific new thread on the progress could be useful.. actually I don't know where to look: dvxuser, dpreview, sonyalpharumors, etc.. an official development in only one forum should be better.
    I think there's really lots of people hoping to enanche their beloved Nex camera.
    I'm one for sure, ready to donate on a good project.

    My hopes:

    - Higher bitrates
    - Clean HDMI
    - Timelapse
    - International FPS (24-25-50-60)


    Reply With Quote
     

  10. Collapse Details
    #80
    Default
    You can start a new forum if you want to. I dont mind. Currently it's the only thread with technical details. Rummors and dpreview threads both dead


    Reply With Quote
     

Page 8 of 16 FirstFirst ... 456789101112 ... LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •