[ Raspberry Pi2 ] OpenCV using Picam 4

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This posting is using not still-shot but video.

copy camcv.c to RaspiVid.c 

Editing RaspiVid.c file. 

1. We  delete- all lines related to the preview component,
2. - all lines related to the encoder component.
3. - all lines related to inline command parsing and picture info…
4. We change :
5. - add the callback directly to the video_port  (line 286)
6. - create and attach the pool (to get/send message)  to the video port… (line 320)
7. - change format encoding to ENCODING_I420 in line (268) (instead of OPAQUE)

But, recommend down load raspiVid.c file

and editing Line 489

1. else if (!raspipreview_create(&state.preview_parameters))
2. => else if ( (status = raspipreview_create(&state.preview_parameters)) != MMAL_SUCCESS)

rename raspiVid.c to camcv.c

(If you download above link, you getting camcv_vid0.c )

1. mv RaspiVid.c camcv.c

All editing file download

build

RUN (using xrdp or rasberry pi x-window)

1

./camcv

cs

If you change color or gray and frame, see Line 124 and Line 119~120.

picam FPS in Pi 1

320×240 color : FPS = 27,2

320×240 gray : FPS = 28,6

640×480 color : FPS = 8

640×480 gray : FPS = 17

picam FPS in Pi 2

320×240 color : FPS = 29.9

320×240 gray : FPS = 29.9

640×480 color : FPS = 24.3

640×480 gray : FPS = 29.9

1280x960 color : FPS=6.6

1280x960 gray : FPS=15

maybe fps limit 29.9