Re: Video capture on EOS 650d only with 4 to 8 fps?

I got a slightly higher resolution (or at least the same) on the 650 
compared to the 550 (450 was a notch lower). I just can't seem to find 
the figures I know I documented somewhere... All cameras provided 
surprisingly good frame rate, in the 24-30 fps range. I can test the 
450D again and provide the details on settings.

The downside with all of these is that 1) You don't get to see the live 
video on the built-in display, and 2) no auto focus. You need to zoom 
and set the focus before you start streaming. I don't think there's a 
way around these shortcomings, I'm afraid.

On 21/12/2020 11:59, Thomas Orgis wrote:
> Am Mon, 21 Dec 2020 10:24:28 +0100
> schrieb Fredrik Björk <[email protected]>:
>
>> I used a 650D for a while this spring and I was, to my big surprise,
>> actually able to get a clean HDMI out of it (no text as long as no
>> buttons were pressed and the battery was OK). An Avermedia LGX capture
>> box reported it to be a 30 Mbps/s 1080p60.
> Wow. I see these capture devices being dirt cheap. This might be a
> better path after all. But I still would like see if gphoto2 can do
> what that Canon webcam tool promises (no Windows box to test that one
> might try a VM with USB passthrough …).
>
>> I mainly used it for
>> capturing via USB though, just as you intend to. I think that I got the
>> low frame rates when setting it to film mode on the dial on the top of
>> the camera. I think we had it on M, Av or Tv, can't remember, and got
>> decent frame rates and picture quality.
> I had it on video. I now tested it on M. Result: 8 fps (81 frames in 10
> s). Downside is that I don't see live video on the display (goes black
> on capture). Ideally, I'd like to be able to see the video on the
> camera besides the computer.
>
> Same on Av and Tv. Blank display and 8 fps out of the camera. In video
> mode, where I get the preview on the display, it's 4 fps.
>
> I got Firmware 1.0.1 on the thing. Is that a difference? There exists
> 1.0.5. I'll have to research how to update that. OK, simple. I am
> trying with 1.0.5 now.
>
>
>> I found my old post from March here (testing a 550D, more or less same
>> results with the 650D): "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." I just can't seem to find the test results from the
>> 650D and 450D.
> Interesting that the resolution is higher for the 550D, while I get
> 960x640 here.
>
> But meh, after the update to 1.0.5, it is not different. 4 fps in video
> mode, 8 fps in photo mode. It occured to me that the cabling might be
> bad, but it is at least reported as USB 2 device:
>
> $ lsusb -tv
> /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
>      ID 1d6b:0003 Linux Foundation 3.0 root hub
> /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M
>      ID 1d6b:0002 Linux Foundation 2.0 root hub
>      |__ Port 2: Dev 56, If 0, Class=Imaging, Driver=, 480M
>          ID 04a9:323b Canon, Inc. EOS Rebel T4i
>
> But since it worked for you … there must be something I can do. I also
> tried a different cable, still the same performance. Maybe we got some
> funky regression in the software stack someplace?
>
>
> Alrighty then,
>
> Thomas



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