thank you very much , it works~
2012-02-16
ZENG SHAN
Tel,861088236837
E-mail,[email protected]
Computing Center
Institute of High Energy Physics,CAS
发件人：McKenzie, Adam
发送时间：2012-02-16 06:15
主题： RE: [Matterhorn-users] 回复: 回复: dural epiphan problems~~~~~help~~~~~
收件人：Matterhorn Users,zengshan
抄送：
Hi Zeng Shan,
This is unfortunately a known issue:
http://opencast.jira.com/browse/MH-7089
There is a workaround if you set the type on both of your Epiphan Cards like so:
capture.device.VGA.type=V4LSRC
capture.device.PRESENTER.type=V4LSRC
It has something to do with the special pipeline we have defined for the
Epiphan cards to provide color bars when they are unplugged. If you use this
workaround you won’t be able to unplug or change resolutions while capturing so
I would highly advise using a VGA scaler if you plan to use this in production.
I am guessing you are just testing it for right now so just make sure you have
both VGA sources plugged in and ready to go.
Thanks,
Adam
Adam McKenzie
ITS, University of Saskatchewan
Rm 61 Physics, 116 Science Place
Saskatoon SK S7N 5E2 Canada
(306) 966-8241
From: [email protected]
[mailto:[email protected]] On Behalf Of Rubén Pérez
Sent: Wednesday, February 15, 2012 5:39 AM
To: zengshan
Cc: matterhorn-users
Subject: Re: [Matterhorn-users] 回复: 回复: dural epiphan problems~~~~~help~~~~~
Both devices use the same driver, which is loaded when matterhorn starts. In
order for the Epiphan card to work with Gstreamer, a parameter must be supplied
when the module is loaded in the kernel, which indicates the number of frame
buffers the card can use (whatever that means, Kristofor Amundsen figured that
out before I started working with the installation scripts). Anyway, by default
the card uses 1 frame buffer, but in order for it to work with Gstreamer, at
least 2 frame buffers must be used. That parameter is set in the file
/opt/matterhorn/capture-agent/epiphan_driver/Makefile, in the load: section,
line starting with sudo /sbin/insmod and ending with v4l_num_buffers=X,where X
is 2 at least.
Now the following is just a theory, but it may as well be right: since the two
vga2usb cards are using the same driver, perhaps you need to increase this
number of buffers accordingly, i.e. you need (at least) 2 for one card, but you
must set the number to 4 (at least) for 2 cards, and so on. So my advise is
for you to increase that number in the file indicated, unload and reload the
module (in the directory where the Makefile is, run sudo make unload & sudo
make load), and repeat your tests.
The other option that occurs to me is that the driver does not support more
than one device installed, but I hardly doubt so. If that was the case,
however, I don't see we can do anything but writing Epiphan and asking them how
to use two devices in the same computer. But, I insist, this seems so unlikely.
I'm assuming that both VGA2USB cards have a VGA input connected and working.
Otherwise you'll get an error every time you try to use them.
Good luck
Rubén
On 15 Feb, 2012 03:57, "zengshan" <[email protected]> wrote:
when I use each single of the two VGA2USB devices, everything works fine, but
when I combine them together,neither works fine, the log shows that:
2012-02-15 10:43:20 INFO (GStreamerPipeline:430) - Successfully initialised 2
devices.
2012-02-15 10:43:20 INFO (GStreamerPipeline:96) - Initializing devices for
capture.
2012-02-15 10:43:20 INFO (EpiphanVGA2USBV4LSubDeviceBin:259) - Sending EOS to
stop /dev/video1_v4lsrc
2012-02-15 10:43:20 INFO (EpiphanVGA2USBV4LSubTestSrcBin:188) - Sending EOS to
stop videotestsrc0
2012-02-15 10:43:20 INFO (EpiphanVGA2USBV4LSubDeviceBin:259) - Sending EOS to
stop /dev/video0_v4lsrc
2012-02-15 10:43:21 INFO (EpiphanVGA2USBV4LSubTestSrcBin:188) - Sending EOS to
stop videotestsrc1
2012-02-15 10:43:22 WARN (GStreamerPipeline$2:144) - mpegpsmux0: Could not
create handler for stream
2012-02-15 10:44:22 ERROR (CaptureAgentImpl:340) - Unable to start pipeline
after 5 seconds. Aborting!
My configuration in
> /opt/matterhorn/felix/conf/services/org.opencastproject.capture.impl.ConfigurationManager.properties
>
> is as follows: is there anything wrong?
> capture.device.names=VGA,PRESENTER
>
> capture.device.VGA.type=EPIPHAN_VGA2USB
> capture.device.VGA.flavor=presentation/source
> capture.device.VGA.outputfile=VGA.mpg
> capture.device.VGA.src=/dev/video0
>
> #added by zengshan
> capture.device.PRESENTER.type=EPIPHAN_VGA2USB
> capture.device.PRESENTER.src=/dev/video1
> capture.device.PRESENTER.outputfile=camera_out.mpg
> capture.device.PRESENTER.flavor=presenter/source
2012-02-15
ZENG SHAN
Tel,861088236837
E-mail,[email protected]
Computing Center
Institute of High Energy Physics,CAS
发件人：zengshan
发送时间：2012-02-15 10:01
主题：回复: dural epiphan problems~~~~~help~~~~~
收件人：Hank Magnuski,Rubén Pérez
抄送：matterhorn-users
can anybody help me out?
thank you very much~
2012-02-15
ZENG SHAN
Tel,861088236837
E-mail,[email protected]
Computing Center
Institute of High Energy Physics,CAS
发件人：zengshan
发送时间：2012-02-14 11:44
主题：dural epiphan problems
收件人：Hank Magnuski,Rubén Pérez
抄送：matterhorn-users
Hi all，
I am now using two epiphan's VGA2USB devices to capture both video and ppt, but
when the CA start to capture, the log in CA shows that:
2012-02-14 11:27:08 INFO (GStreamerPipeline:430) - Successfully initialised 2
devices.
2012-02-14 11:27:09 INFO (GStreamerPipeline:96) - Initializing devices for
capture.
2012-02-14 11:27:09 INFO (EpiphanVGA2USBV4LSubDeviceBin:259) - Sending EOS to
stop /dev/video0_v4lsrc
2012-02-14 11:27:09 INFO (EpiphanVGA2USBV4LSubTestSrcBin:188) - Sending EOS to
stop videotestsrc0
2012-02-14 11:27:09 INFO (EpiphanVGA2USBV4LSubDeviceBin:259) - Sending EOS to
stop /dev/video1_v4lsrc
2012-02-14 11:27:09 INFO (EpiphanVGA2USBV4LSubTestSrcBin:188) - Sending EOS to
stop videotestsrc1
2012-02-14 11:27:09 WARN (GStreamerPipeline$2:144) - mpegpsmux0: Could not
create handler for stream:
So I use gst debug level 2 to see more, and it shows that:
matterhorn@capture:/opt/matterhorn/felix/conf$ gst-launch -e --gst-debug=2
v4lsrc device=/dev/video0
Setting pipeline to PAUSED ...
0:00:00.021649224 9240 0x7f9080 WARN v4l
v4lsrc_calls.c:489:gst_v4lsrc_try_capture:<v4lsrc0> error: system error: Wrong
medium type
0:00:00.023990750 9240 0x7f9080 WARN v4l
v4lsrc_calls.c:489:gst_v4lsrc_try_capture:<v4lsrc0> error: system error: Wrong
medium type
0:00:00.026393783 9240 0x7f9080 WARN v4l
v4lsrc_calls.c:489:gst_v4lsrc_try_capture:<v4lsrc0> error: system error: Wrong
medium type
0:00:00.032750484 9240 0x7f9080 WARN v4l
v4lsrc_calls.c:489:gst_v4lsrc_try_capture:<v4lsrc0> error: system error: Wrong
medium type
0:00:00.035141576 9240 0x7f9080 WARN v4l
v4lsrc_calls.c:489:gst_v4lsrc_try_capture:<v4lsrc0> error: system error: Wrong
medium type
0:00:00.036005793 9240 0x7f9080 WARN basesrc
gstbasesrc.c:2639:gst_base_src_default_negotiate:<v4lsrc0> error: No supported
formats found
0:00:00.036024839 9240 0x7f9080 WARN basesrc
gstbasesrc.c:2639:gst_base_src_default_negotiate:<v4lsrc0> error: This element
did not produce valid caps
Pipeline is live and does not need PREROLL ...
ERROR: from element /GstPipeline:pipeline0/GstV4lSrc:v4lsrc0: Could not
synchronize on resource.
Additional debug info:
v4lsrc_calls.c(489): gst_v4lsrc_try_capture ():
/GstPipeline:pipeline0/GstV4lSrc:v4lsrc0:
system error: Wrong medium type
ERROR: pipeline doesn't want to preroll.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...
matterhorn@capture:/opt/matterhorn/felix/conf$ gst-launch -e --gst-debug=2
v4lsrc device=/dev/video1
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
0:00:01.195766353 9243 0x17458c0 WARN basesrc
gstbasesrc.c:2550:gst_base_src_loop:<v4lsrc0> error: Internal data flow error.
0:00:01.195807301 9243 0x17458c0 WARN basesrc
gstbasesrc.c:2550:gst_base_src_loop:<v4lsrc0> error: streaming task paused,
reason not-linked (-1)
ERROR: from element /GstPipeline:pipeline0/GstV4lSrc:v4lsrc0: Internal data
flow error.
Additional debug info:
gstbasesrc.c(2550): gst_base_src_loop ():
/GstPipeline:pipeline0/GstV4lSrc:v4lsrc0:
streaming task paused, reason not-linked (-1)
Execution ended after 12849465 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...
2012-02-14
ZENG SHAN
Tel,861088236837
E-mail,[email protected]
Computing Center
Institute of High Energy Physics,CAS
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