Re: [gphoto-devel] Canon EOS 1000D Zoom in LiveView (Evf)

[Luc J. <luc...@vi...>]

Hi Marcus,

     As I told you, I ran some tests to verify the new functionality. I 
tested the Zoom 1X and 5X and it works.
     But something broke in the library that prevents pictures to be 
taken after you either exit LiveView or you use  camera_exit().
     It seems like the camera is never activated so the capture call 
fails. Then, you have to reset the camera by removing the battery pack.

     I dug the problem out and I think I have spotted it. In release 
12937, there's some new code in library.c (in camera_exit() actually) 
where you call camera_unprepare_capture(). This seems to cause the 
problem. I tried removing the call and it works as before (I was using 
12794 as my working baseline). There's a comment "...not done yet..." in 
camera_unprepare_canon_eos_capture(). Is this related??

     Can you please try to see if you can reproduce the problem on your 
side?

     Here are two tests I tried many times :

---- First Test ----
1. Allocate the camera
2. Take Picture (it works) --- I tried multiple times
3. Close camera (camera_exit() has to be called)
4. Take Picture (doesn't work) --- on my computer, it takes about a 
minute to return
5. You have to unplug the power to the camera here and replug it --- I 
have to unplug the battery pack completely

---- Second Test ----
1. Allocate the camera
2. Take Picture (it works) --- I tried multiple times
3. Start LiveView
4. Stop LiveView
5. Take Picture (doesn't work) --- it takes about a minute to return

     Thanks for you help!

     Luc

PS : I replied to your last email concerning the Zoom but this post 
should probably be posted elsewhere...

On 25/05/2010 16:58, Marcus Meissner wrote:
> On Tue, May 25, 2010 at 10:05:59AM -0400, Luc Jalbert wrote:
>    
>> Hi Marcus,
>>
>>      When do you think you might be able to address this issue?
>>      
> I have implemented Zoom and Zoom Position (for the preview/viewfinder
> code) setting in libgphoto2 TRUNK and 2.4 branch.
>
> On the EOS 1000D ... I get Zoom Factors of 1 and 5 only,
> the Zoom Position can be set in 64 pixel steps.
>
> It also reacts slow, I can take 2 - 3 preview frames before it gets active.
>
> 	gphoto2 --capture-preview --set-config eoszoom=5 --capture-preview --capture-preview --capture-preview
>
> 	gphoto2 --set-config eoszoomposition=640,320
>
> Ciao, Marcus
>
>