Re: Resolution in liveview for DSLR cameras?

The bigger the preview, the slower the USB is going to be.  I've done
a little with gp_camera_capture_preview() and I think you should be
looking at viewfinder resolution because that's usually the size of
the preview images.  It should be in the specs of cameras.  My D5200
gives 640x424 preview images.

On 3/28/20, Fredrik Björk <[email protected]> wrote:
> Hi!
>
> I had the opportunity to test a Canon EOS 350D (Rebel XT). It needed a
> CF card installed, otherwise it wouldn't do a capture. It did obey the
> --capture-movie command, but it produced the frames by opening the
> shutter repetedly, so the frame rate wasn't exactly top-notch ;)
>
> So, asking again, anyone got info on cheap DSLRs with a good liveview
> resolution and frame rate?
>
> /Fredrik
>
> On 27/03/2020 20:07, Manuel Ullmann wrote:
>> Nikonhacker has been down for some time. Use webarchive, if you need
>> their old wiki.
>>
>> Firmware patching only works for old Nikon DSLRs, because the newer
>> firmware format has not been reverse engineered. I don’t think, Coolpix
>> cameras are supported, but see for yourself.
>> http://simeonpilgrim.com/nikon-patch/nikon-patch.html
>>
>> Manuel
>>> Tried to register in nikonhacks but the web page it opens is just blank.
>>> <sigh>
>>>
>>> Any ideas?
>>>
>>> Still trying to get the Coolpix A900 to work.
>>>
>>> David
>>>
>>> On 3/27/20 12:55 AM, Hans Petter wrote:
>>>
>>>   Check out nikonhacker.com to check if there is a firmware that allows
>>> clean hdmi-out. I have used this on my d5100s..
>>>
>>>   Best of luck!
>>>
>>>   Hans Petter, Norway
>>>
>>>   Sendt fra min iPhone
>>>
>>>   27. mar. 2020 kl. 02:14 skrev Fredrik Björk <[email protected]>:
>>>
>>>    Hi!
>>>
>>>   I wanted to get a decent live feed from a DSLR via USB and have tried a
>>> Canon EOS 550D and a Nikon D7100. The 550D gives me an almost
>>>   acceptable 1056x704 at 26-30 fps and the D7100 a mere 640x426 at 24
>>> fps. Are there any lists showing the resolution and frame rate one can
>>>   expect from different cameras? Ideally, I would like to get full HD at
>>> 30 fpm but I guess DSLRs aren't designed for that. I know some DSLRs
>>>   have a clean HDMI out, but feeding a few USB cameras to OBS is a lot
>>> simpler than having to go via HDMI using multiple HDMI to USB
>>>   converters. I'm currently experimenting with OBS in Linux (Debian) and
>>> I got the 550D and the D7100 working simultaneously, which is good.
>>>   Now, I would like to get the best "cheapish" camera that can feed OSB
>>> with a decent video stream. So the trick is to get 2-3 used cameras that
>>>   are as cheap as possible but still provides something (at least
>>> slightly) better than the 1056x704 the 550D can do. Even the 550 is a lot
>>> better
>>>   than most USB HD webcams due to better lenses and picture quality. One
>>> major benefit I see with DSLRs is the possibility to use different
>>>   lenses and possibly zoom lenses. The project is for live streaming a
>>> stage.
>>>
>>>   So, bottom line: cheap DSLRs with hi-res USB liveview :)
>>>
>>>   /Fredrik
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