Re: [gphoto-devel] gPhoto2 - Regarding Camera Control Suggestion

I just did the test again ... my need is - I want to do the Auto-Focus
independently (not by capture-image)

I did the below:

- Set the Camera Lens to Manual and De-Focus the scene
- Take image by *-capture-image-and-download*
- Set the Camera Lens to Auto
- Set *-viewfinder=1*
- Set *-autofocusdrive=1*
- Change the Camera Lens to Manual again
- Take image by *-capture-image-and-download*

Compare two picture there is no change in Focus. Both picture are De-Focus.

Any advise? Or my test case is wrong?

Thanks.


On Sun, May 17, 2020 at 9:31 PM Nazmus Sakib <[email protected]> wrote:

> Ok yes ... I got it as only 1 USB session can be there.
>
> But when LiveView is OFF (viewfinder = 0) ...then if I run "*--set-config
> autofocusdrive=1"  *then it's not doing any Focus. It should do the
> Auto-Focus ... right?
>
> Thanks.
>
> Regards.
>
>
>
> On Sun, May 17, 2020 at 9:21 PM Marcus Meissner <[email protected]> wrote:
>
>> Hi,
>>
>> This would be the command... However you cannot execute in a parallel
>> gphoto2 session, it needs to be in the same session as the
>> --capture-movie,
>> which makes this tricky....
>>
>> Ciao, Marcus
>> On Sun, May 17, 2020 at 08:20:35PM +0600, Nazmus Sakib wrote:
>> > Hi Alan.
>> >
>> > Thanks for replying. Which command you mean to do Auto Focus ...
>> *--set-config
>> > autofocusdrive=1*? I tried it but the focus ring not changed.
>> >
>> > Regards.
>> >
>> > On Sun, May 17, 2020 at 8:00 PM Alan Corey <[email protected]> wrote:
>> >
>> > > Yes, you send a command to start auto focus, you choose when to send
>> it.
>> > > On May 17, 2020 9:56 AM, "Nazmus Sakib" <[email protected]> wrote:
>> > >
>> > >> Hi Marcus.
>> > >>
>> > >> One ques please ...
>> > >>
>> > >> I want to do only Auto-Focus the LiveView, not Capture-Image. Is it
>> > >> possible?
>> > >>
>> > >> For test I'll use Canon 6D and Nikon D5100.
>> > >>
>> > >> Thanks.
>> > >>
>> > >> Regards.
>> > >>
>> > >> On Sat, May 16, 2020 at 7:57 PM Marcus Meissner <[email protected]>
>> wrote:
>> > >>
>> > >>> On Sat, May 16, 2020 at 06:02:34PM +0600, Nazmus Sakib wrote:
>> > >>> > Hi Marcus. Well noted.
>> > >>> >
>> > >>> > One more problem I am facing related with Live Streaming and I'll
>> be
>> > >>> glad
>> > >>> > to have your advise.
>> > >>> >
>> > >>> > I am using Live Streaming using below commands and view the
>> stream on
>> > >>> VLC
>> > >>> > Player (Network Stream).
>> > >>> >
>> > >>> > gphoto2 --set-config viewfinder=1
>> > >>> > gphoto2 --capture-movie --stdout | ffmpeg -re -i pipe:0 -listen 1
>> -f
>> > >>> mjpeg
>> > >>> > http://10.10.10.253:8080/feed.mjpg
>> > >>> >
>> > >>> > But I am experiencing around 3 - 5 sec delay in the Stream View.
>> My
>> > >>> WiFi is
>> > >>> > stable tough. I tested it using both Canon 6D and Nikon 5100.
>> > >>> >
>> > >>> > Is there any way to reduce the delay and make the stream as much
>> > >>> real-time
>> > >>> > as possible?
>> > >>>
>> > >>> This is hard to do ... we emit images via stdout as quick as we
>> can, but
>> > >>> the buffering over ffmpeg and http will cause delays :/
>> > >>>
>> > >>> I found
>> > >>>
>> https://stackoverflow.com/questions/16658873/how-to-minimize-the-delay-in-a-live-streaming-with-ffmpeg
>> > >>>
>> > >>> e.g. ffmpeg flags:
>> > >>>
>> > >>> -fflags nobuffer
>> > >>>
>> > >>> would be worth to try.
>> > >>>
>> > >>> Ciao, Marcus
>> > >>>
>> > >>
>> > >>
>> > >> _______________________________________________
>> > >> Gphoto-user mailing list
>> > >> [email protected]
>> > >> https://lists.sourceforge.net/lists/listinfo/gphoto-user
>> > >>
>> > >>
>>
>>
>> > _______________________________________________
>> > Gphoto-devel mailing list
>> > [email protected]
>> > https://lists.sourceforge.net/lists/listinfo/gphoto-devel
>>
>>
>> --
>> Marcus Meissner,SUSE LINUX GmbH; Maxfeldstrasse 5; D-90409 Nuernberg; Zi.
>> 3.1-33,+49-911-740 53-432,,serv=loki,mail=wotan,type=real <
>> [email protected]>
>>
>

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