VideoCapture not working. #5

Activity

1. p0wdrdotcom commented on Jul 30, 2017

   

   p0wdrdotcom

   on Jul 30, 2017

   Contributor

   More actions

   Looking at the output from cmake would suggest that the video module is available but due to the lack of ffmpeg on amazon linux you would have to build it some other way.

   the output from cmake looks like this

   --   Video I/O:
   --     DC1394 1.x:                  NO
   --     DC1394 2.x:                  NO
   --     FFMPEG:                      NO
   --       avcodec:                   NO
   --       avformat:                  NO
   --       avutil:                    NO
   --       swscale:                   NO
   --       avresample:                NO
   --     GStreamer:                   NO
   --     OpenNI:                      NO
   --     OpenNI PrimeSensor Modules:  NO
   --     OpenNI2:                     NO
   --     PvAPI:                       NO
   --     GigEVisionSDK:               NO
   --     Aravis SDK:                  NO
   --     UniCap:                      NO
   --     UniCap ucil:                 NO
   --     V4L/V4L2:                    NO/YES
   --     XIMEA:                       NO
   --     Xine:                        NO
   --     gPhoto2:                     NO
   

   As you can see V4L is there (Video for Linux) so Video will work but its unlikely your codec will be supported without FFMpeg

   You will need to fetch the source of FFMpeg, build it, then point the opencv cmake to it to get opencv to link against it. Finally then you would need to include the built FFMpeg libs in the cv2 directory of the lambda package.

   I'll give it a go and submit a patch if I get it working
2. rashadmoarref commented on Aug 3, 2017

   

   rashadmoarref

   on Aug 3, 2017

   More actions

   I have the same problem and would appreciate if you could share the solution. How to install and link ffmpeg to opencv for use in AWS Linux (lambda)?
3. aeddi commented on Sep 8, 2017

   

   aeddi

   on Sep 8, 2017

   Owner

   More actions

   @p0wdrdotcom is right. (thanks for your detailed answer)
   To get VideoCapture working you'll have to build, link and include all the needed dependencies into your module package.
   I don't have any time to work on this for the moment but if someone send me a pull request I'll merge the change with the main repo.
4. aeddi

   closed this as completedon Sep 8, 2017