Webcam "capped" at 4.5fps?

Message

suicidal_orange_II · Post by **suicidal_orange_II** » Thu Sep 16, 2010 9:08 pm

Oh yeah, that would be more useful

There are plenty of them!

media-video/mplayer-1.0_rc4_p20091026-r1  USE="X a52 aac alsa ass cddb cdio dga dirac dts dv dvd dvdnav enca encode faac faad iconv ipv6 live mmx mmxext mp3 network opengl osdmenu quicktime rar real rtc schroedinger sdl shm speex sse sse2 ssse3 theora toolame tremor truetype twolame unicode v4l2 vorbis x264 xscreensaver xv xvid -3dnow -3dnowext -aalib (-altivec) -amr -bidi -bindist -bl -bs2b -cdparanoia -cpudetection -custom-cpuopts -debug -directfb -doc -dvb -dxr3 -esd -fbcon -ftp -ggi -gif -gmplayer -jack -joystick -jpeg -ladspa -libcaca -lirc -lzo -mad -md5sum -mng -nas -nut -openal -oss -png -pnm -pulseaudio -pvr -radio -samba (-svga) -teletext -tga -v4l -vdpau (-vidix) (-win32codecs) -xanim -xinerama -xvmc -zoran" VIDEO_CARDS="nvidia -mga -s3virge -tdfx"

Post by **NeddySeagoon** » Thu Sep 16, 2010 9:21 pm

suicidal_orange_II,

That looks good. How hard is mplayer hiting your CPUs. Run the cam stream and look at the CPU use in top.
Press the number 1 key and look at all CPUs separately.

suicidal_orange_II · Post by **suicidal_orange_II** » Thu Sep 16, 2010 9:54 pm

Not sure where I should be looking on the 4 cpu list - the %us's peak up to around 50 (when added together, the highest one peaks at 25) with the stream running compared to around 20 without (with a single peak of around 10). It flicks between 0.5 and 2% cpu on the main table? That was at 1280x720 (thought I'd at least give it a challenge!)

iss · Post by **iss** » Fri Sep 17, 2010 11:19 am

In the first post you said it behaves the same on windows and on linux - maybe the webcam is broken?

BTW you can also try to test it with ubuntu live cd.

suicidal_orange_II · Post by **suicidal_orange_II** » Wed Sep 22, 2010 6:56 pm

As an interesting sidenote forcing 20fps in guvcview gives me 9.5fps all the way up to 1280x720, but all the other options output 4.5 regardless of resolution.

Does this say anything? If I had a CD drive I'd try ubuntu, but it's dead

iss · Post by **iss** » Thu Sep 23, 2010 10:37 am

You can make bootable USB key with sys-boot/unetbootin.

mimic · Post by **mimic** » Sun Oct 03, 2010 4:55 pm

Could you send output of

Code: Select all

uvcdynctrl -f

or

Code: Select all

luvcview -L

for you webcam, to see what driver sees as available resolutions/framerates? Creative Cam Socialize HD?

Maybe the problem is in exposure being too long so FPS cannot be higher. Try lowering exposure. For example with:

Code: Select all

uvcdynctrl -s "Exposure, Auto" 3
uvcdynctrl -s "Exposure, Auto Priority" 0

mimic · Post by **mimic** » Sun Oct 03, 2010 4:59 pm

You could use also V4L capture example to see raw capture speed without any postprocessing. For everyframe just a dot is displayed.