Hello,
I am testing Microsoft Lifecam Cinema now, but I am not able to record
audio and video syncronusely with that cam and guvcview. The Logitech
C525 works but has a crappy image. Also cheese works with both cams but
has a little frame rate. Skype works for both.
Do you have any ideas? I have
Hi,
guvcview detects some sync issues, it seems although you select 30
fps, for that resolution (1280x720) your hardware is just not powerful
enough to decode the MJPG stream and re-encode it with whatever coded
you are using.
Some solutions:
-reduce the fps
-reduce the resolution
-try using a
Hi,
if you are using any of the mpeg4 codecs, you will need a rather
powerful cpu for encoding at high frame rates, specially at any decent
resolution.
As an example I don't have any special problems with the following
configuration:
device input: MJPEG 800x600@25 fps
video codec - mpeg 4 - avc
Hi Paulo,
I am using a quite powerful PC i5 2.8 8 Gig RAM, ... and even with
lowest settings, 640 x 480 the result is the same. The audio always
comes out first. If I choose a different audio source like my other
Logitech C525 or Lifecam VX-2000 the recording of the Lifecam Cinema is
fine and
Hi,
Well if the audio comes first it means you are dropping audio frames
making audio capture shorter than video, this usually means issues
with the audio source, you seem to have confirmed this by changing to
another mic and verifying that the recorded video works fine in that
case.
There could
I've seen some discussion about this in January 2010 on this list. Has
this issue been resolved? For those who don't remember or haven't seen
the post, it is here:
http://lists.berlios.de/pipermail/linux-uvc-devel/2010-January/005464.html
Essentially the camera seems to request the highest
Hi,
On Friday 20 August 2010 13:37:26 s...@open-t.co.uk wrote:
I've seen some discussion about this in January 2010 on this list. Has
this issue been resolved? For those who don't remember or haven't seen
the post, it is here:
FYI, I did as you said -
bandwidth = 2048 seems to do the trick.
Is this going to have a suitable 'workaround'/hack built into the driver at
some point, or something I will need to manually define for the near future?
Thanks,
-Seth
On Sat, Jan 23, 2010 at 8:18 AM, Laurent Pinchart
Hi Seth,
On Thursday 21 January 2010 04:54:34 Seth W wrote:
Hi Laurent,
I hate to be a pest
Don't worry. I may be slow to answer due to my current work load, but I'm not
ignoring you :-)
but am curious as to whether or not you think this issue will be solvable.
I am trying to determine
Hi Laurent,
I hate to be a pest but am curious as to whether or not you think this issue
will be solvable. I am trying to determine if I will be keeping these two
cameras or returning them, as they are only useful to me if they will both
work (simultaneously) within the uvcvideo project. Thanks
Hi Seth,
On Monday 11 January 2010 03:45:21 Seth W wrote:
Thanks for the prompt response
I wouldn't call it prompt, and I apologize for that.
- I had actually tried MJPEG in mencoder (not sure how to test it in
ffmpeg); but for some reason it allocates the same exact bandwidth as well,
no
Here you go..
[including dmesg information directly after modprobe uvcvideo];
For the sake of clarity I have sent the output as three different
attachments,
uvcvideo-modprobe-dmesg.txt: output from dmesg/kernel buffer after
'modprobe uvcvideo' (with options uvcvideo trace=0x40f)
Just out of curiosity, am I correct in understanding that the driver (per
what the camera is telling it) is allocating too much bandwidth on the USB
bus or is this proper behavior? I am trying to determine if I will be able
to have two of these cameras operating simultaneously on the same
Hi Seth,
On Wednesday 06 January 2010 03:54:11 Seth W wrote:
Here you are. Thanks in advance for your assistance. (PS - Please note
there are two cameras, both same make/model therefore share the same ID)
Thanks for the information. The device supports the following bandwidths
(unrelated
Thanks for the prompt response - I had actually tried MJPEG in mencoder (not
sure how to test it in ffmpeg); but for some reason it allocates the same
exact bandwidth as well, no matter what resolution, codec (mjpeg or yuv), or
frame rate. If you can provide any insight into this or suggest any
Greetings,
I have two Microsoft LifeCam Cinema Cameras attached to a single system
(only one USB 2.0 controller). I have set trace=1024 on uvcvideo and find
that the driver allocates the same amount of bandwidth regardless of what I
specify for resolution, fps, or codec in ffmpeg, vlc, etc.
Hi,
Please check this thread:
http://ubuntuforums.org/showthread.php?p=8480893
The camera supports both YUYV and MJPG
However it seems to have some timing issues as it crashes a bit
randomly while streaming (requiring a format reset - VIDIOC_S_FMT )
Best regards,
Paulo
2009/12/19 Guntars
Hi, there!
I read on Linux UVC driver webpage that this camera is fully
supported, but couldn't find any additional information on either this
mailing list or elsewhere as this is a fairly new device.
So can anyone be so kind and provide me with lsusb -v output for this device ?
I am
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