CV_CAP_PROP_FPS missing from Java bindings

[opencv-pushbot]

Transferred from http://code.opencv.org/issues/3454

|| Steven Goldsmith on 2013-12-23 15:56
|| Priority: High
|| Affected: 2.4.8 (latest release)
|| Category: java bindings
|| Tracker: Bug
|| Difficulty: 
|| PR: 
|| Platform: x64 / Linux

CV_CAP_PROP_FPS missing from Java bindings

CV_CAP_PROP_FPS missing from org.opencv.highgui.Highgui.

History

Evgeny Talanin on 2013-12-27 09:09

-   Assignee set to Andrey Pavlenko
-   Category set to java bindings

Anna Kogan on 2014-01-13 09:36

-   Affected version changed from 2.4.7 (latest release) to 2.4.8
    (latest release)
-   Status changed from New to Open

Jose Gómez on 2014-02-25 01:34

I'd say it's probably not as easy as just exposing the constant. As per the sources, this constant evaluates to 5:

    modules/highgui/include/opencv2/highgui/highgui_c.h:    CV_CAP_PROP_FPS            =5

However, videocapture.get(5) returns NaN [for a videocapture of type VideoCapture].

Will Stewart on 2014-02-25 19:41

videocapture.get(5) normally works for me at the present time, return FPS for most video streams. Occasionally it is zero for some streams, and I can't for the moment remember the exact circumstances though I believe it may be when I'm connected to certain streams from internet webcams.

I'm using 2.4.8 on Ubuntu Studio 13.10

Jose Gómez on 2014-04-07 21:25

Update: from my tests, videocapture.get(5) works only sometimes:

- With mp4 (x264) files, it seems to work fine
- With mov files, it's fine as well
- With avi (mpeg4) files, it is almost always 0/NaN, other than in a few 125 fps videos, in which it reports CV_CAP_PROP_FPS = 59.583333333333336 (instead of 125).

[sturkmen72]

just tried
System.out.print( Videoio.CAP_PROP_FPS );
output : 5