I'm just trying the simplest pipeline "v4l2src ! xvimagesink"
Just it and getting 10/1 fps with no CPU penality.
see bellow
btw: to flip the image use (this is done by driver so it will be fast as
possible)
GstVideoOrientation *vidorient = GST_VIDEO_ORIENTATION (source)
gboolean flip;
gst_video_orientation_get_hflip (vidorient, &flip);
gst_video_orientation_set_hflip (vidorient, flip);
gst_video_orientation_get_vflip (vidorient, &flip);
gst_video_orientation_set_vflip (vidorient, flip);
BR,
Edgard
Nokia-N800-06:~$ whoami
user
Nokia-N800-06:~$ gst-launch-0.10 -v v4l2src ! xvimagesink
Setting pipeline to PAUSED ... /pipeline0/v4l2src0: queue-size = 2
/pipeline0/v4l2src0.src: caps = video/x-raw-yuv, format=(fourcc)UYVY,
width=(int)640, height=(int)480, framerate=(fraction)10/1 Pipeline is
live and does not need PREROLL ...
Setting pipeline to PLAYING ... New clock: GstSystemClock
/pipeline0/xvimagesink0.sink: caps = video/x-raw-yuv,
format=(fourcc)UYVY, width=(int)640, height=(int)480,
framerate=(fraction)10/1
PID USER STATUS RSS PPID %CPU %MEM COMMAND
1464 user S 3392 1462 8.2 2.6 gst-launch-0.10
736 root S < 3876 317 3.9 3.0 Xomap
1449 root R 716 1126 1.5 0.5 top
998 user S < 11M 937 0.0 9.0 maemo-launcher
1009 user S < 7140 937 0.0 5.6 maemo-launcher
1005 user S < 6928 937 0.0 5.4 maemo-launcher
1053 systemui S < 6528 317 0.0 5.1 systemui
937 user S < 4572 1 0.0 3.5 maemo-launcher
1033 user S < 3416 317 0.0 2.6 osso-media-serv
1460 user S 3392 1450 0.0 2.6 gst-launch-0.10
1462 user S 3392 1460 0.0 2.6 gst-launch-0.10
1463 user S 3392 1462 0.0 2.6 gst-launch-0.10
1465 user S 3392 1462 0.0 2.6 gst-launch-0.10
1108 user S 3028 317 0.0 2.3 mediaplayer-eng
1109 user S 3028 1108 0.0 2.3 mediaplayer-eng
776 user S < 2920 317 0.0 2.2 matchbox-window
1117 user S N 2900 317 0.0 2.2 metalayer-crawl
1120 user S N 2900 1117 0.0 2.2 metalayer-crawl
772 user S < 2536 317 0.0 1.9 sapwood-server
1036 user S 2024 1 0.0 1.5 dbus-vfs-daemon
ext Florent de Dinechin escreveu:
ext Carlos GP escreveu:
> > Hi there!
> >
> > I want to develope a program that uses the camera from n800, but I'm
> >
I guess you have read the page about the camera on
http://www.maemo.org/platform/docs/how-to.html
By the way, I tried several variations of the example mirror program
given on this page on my n800, and the result is always very slow (1-2
frames per second), and even slows down the whole machine.
Would anybody with a better experience send me a C snippet of a fast
v4l camera-to-screen pipeline ?
(then I will write the ultimate killer app for the n800: a program
that flips your image like a real mirror, so that you can use the
n800 to shave or fix your makeup. It's probably one line more than the
tutorial program).
Florent
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