[pvrusb2] no video...

[Mike Isely]

On Sat, 17 Jan 2009, Dhimiter Bozo wrote:

> i've traditionally been a pc users but lately i've been playing around with
> Ubuntu. i am in no way an expert but can certainly navigate around and get a
> few things setup. i have the happaugue pvr usb2 capture card and am trying
> to set it up. i've gone through your installiation instructions but still no
> luck. i've got the driver installed and still not able to see the cable
> streams. below is a list of pvr related modules that are loaded. i'm not
> sure if that shows anything. i've also tried to send the stream to mplayer
> but nothing. output for both are below. i was wondering if you would see
> something that i have not been able to:
> 
> dhimiter at linksys-ubuntu:~$ lsmod | grep pvrusb2
> pvrusb2               148032  0
> cx2341x                21124  2 ivtv,pvrusb2
> v4l2_common            19840  8
> cx8800,ivtv,bttv,wm8775,tuner,cx25840,pvrusb2,cx2341x
> videodev               41344  6 cx8800,cx88xx,ivtv,bttv,tuner,pvrusb2
> v4l1_compat            22404  2 pvrusb2,videodev
> tveeprom               20228  4 cx88xx,ivtv,bttv,pvrusb2
> i2c_core               31892  15
> cx88xx,ivtv,bttv,i2c_algo_bit,lirc_i2c,tuner_simple,tda9887,tda8290,wm8775,tuner,cx25840,pvrusb2,v4l2_common,tveeprom,nvidia
> usbcore               148848  5 pvrusb2,btusb,ehci_hcd,uhci_hcd
> 

That looks ok...


> 
> 
> dhimiter at linksys-ubuntu:~$ mplayer /dev/video0
> mplayer: could not connect to socket
> mplayer: Connection refused
> Failed to open LIRC support. You will not be able to use your remote
> control.
> 
> Playing /dev/video0.
> Cannot seek backward in linear streams!
> Seek failed
> Cannot seek backward in linear streams!
> Seek failed
> Cannot seek backward in linear streams!
> Seek failed
> .................................. [the above line is repeated multiple
> times]
> MPEG-PS file format detected.
> VIDEO:  MPEG2  720x480  (aspect 2)  29.970 fps  8000.0 kbps (1000.0 kbyte/s)
> xscreensaver_disable: Could not find XScreenSaver window.
> GNOME screensaver disabled
> ==========================================================================
> Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough


> VDec: vo config request - 720 x 480 (preferred colorspace: Mpeg PES)

Hmm, it detected 720x480 so the driver has to be giving you a video 
stream.


> Could not find matching colorspace - retrying with -vf scale...
> Opening video filter: [scale]
> The selected video_out device is incompatible with this codec.
> Try appending the scale filter to your filter list,
> e.g. -vf spp,scale instead of -vf spp.
> VDecoder init failed :(

This is a strong clue that your mplayer setup isn't right.  Do you have 
an mpeg2 file laying around that you can try to play?

On the flip-side you should be able to cat /dev/video into a file and 
then play that with any tool that can understand mpeg.

   [...]

  -Mike

-- 

Mike Isely
isely @ pobox (dot) com
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