Live View performance (EDSDK v3.2)

[smallfly]

Hi,

Following are the performances I get running the example on both OS X 10.11.2 and Windows 10 with OF master branch and EDSDK v3.2.

OS X (both 32bit and 64bit) Canon Rebel T6s App 60 fps Cam Live View 29 fps Bandwidth 4.7 MiB/s (Notes: the EDSDK v3.2 crashes really often on OS X with this camera - see #41)

Canon Rebel T1i App 60 fps Cam Live View 29 fps Bandwidth 3.7 MiB/s

Windows (both 32bit and 64bit on two different Windows computers) Canon Rebel T6s App 59 fps Cam Live View 9 fps Bandwidth 0.8 MiB/s

Canon Rebel T1i App 59 fps Cam Live View 10 fps Bandwidth 1.1 MiB/s

Would someone have an idea why there is so much difference between OSX and Windows? Does someone get different results with the same setups?

As already discussed in the issue #27 I tried using libjpeg-turbo via ofxTurboJpeg but this time the performances are quite similar.

Using EOS Utility 3.3.0, I get a Live View at ~30fps on both OS X and Windows and for both cameras. With OF 0.8.4 and EDSDK v2.14, the T1s Live View was around 30 fps and at that time the T5i was ~20fps (on both OS X and Windows).

Thanks

[elliotwoods]

First check: You're building Release not Debug, right?

[smallfly]

Yep. I tried both Debug and Release. Same results.

[elliotwoods]

I'm generally not using live view but can test on my computer here. I know I had to change some of the threading pattern to get ofxEdsdk working well on Windows a while back but I don't think that is related

[smallfly]

I just tried the VS project available here and I get a good frame rate with the T6s. I going to look at the source code and see if I can find something helpful.

[smallfly]

After running some more tests, it seems that what is taking time to execute on Windows (with OF) is the call to DownloadEvfImage() in EdsExamples.cpp at the line 51.

[smallfly]

This does not seems to be an issue in the Canon SDK as the same version of the EDSDK is working fine with the C# project available here.

Quick summary .... The EDSDK v3.2 used with OF is crashing on OS X with the T6s (see #41), and the Live View is really slow on Windows with all the cameras I have at my disposal. On Windows, I have tried building Release and on two different machines.

I don't know what to make of this. What could be the issue? Could it be related to one of the VS project's properties? Could it be an USB issue in OF?

[smallfly]

@elliotwoods ... I just tried your fork and the Live View is working great with it. Why didn't I try this sooner!? Why !? (Well at least now I know my way better in VS :).

I'm going to look at your version more in details, to see what are the differences with @kylemcdonald 's version (I guess the 'threading pattern' ?).

Thanks!

[smallfly]

Thinking about it, maybe this issue should stay open for now.

[elliotwoods]

Interesting. All tests were against EDSDK 3.2?

i think i stripped all my threading patterns out after kyle updated his to work on windows (this was a long time ago).

diff'ing mine vs kyle https://github.com/kylemcdonald/ofxEdsdk/compare/master...elliotwoods:master looks essentially the same (ignoring that i've added the EDSDK, and the extra Visual Studio parts)

[smallfly]

Yes, all the tests were against EDSDK 3.2.

I have not compared the sources yet, but the diff you shared does not show any diff in the ofxEdsdk.cpp file. This is not possible. Am I missing something?

Could it be properties of the ofxEdsdkLib.vcxproj that make EDSDK work better with your version of the add-on?

[yty]

I have this problem too...

live View mode app-fps 55 -> cam-fps 6

windows10 +vs2017 + of10.1 + edsdk 3.61 + canon Eos 70D + release

Does anyone know why this is?

[elliotwoods]

hey - i got a notification so just dropping in perhaps try ofxCanon instead? https://github.com/elliotwoods/ofxCanon It's 'backwards compatible' with ofxEdsdk