[mythtv-users] First time setup: can't watch recorded or live TV

[William Munson]

Roger E. Scheen wrote:
> Hi,
>    I put together a MythTV PVR project from scratch because I'm a Unix  
> software engineer that wanted to learn more Linux, so it seemed like a  
> fun way to do it.  Here's my setup:
>
> MythTV version 0.20
> ivtv:  version 0.7.4
> Hauppauge WinTV PVR-150 card (cx23416 based)
> Linux kernel: 2.6.17-10-generic (Ubuntu Edgy Eft 6.10)
>
> Worked through a lot of issues, but I seem to be hitting a brick wall  
> with this one.  I startup mythfrontend, select "Watch TV", and I get a  
> blank screen for about 5 seconds, then it comes back to the menu with  
> no other clues.  Looking at the output from mythfrontend, I get these  
> conspicuous messages:
>
> 2007-05-16 17:15:50.765 TV: Attempting to change from None to  
> WatchingLiveTV
> 2007-05-16 17:15:50.766 Using protocol version 31
> 2007-05-16 17:15:56.997 DPMS Deactivated
> 2007-05-16 17:15:57.016 NVP: Couldn't find a matching decoder for:  
> /media/mythtv/1147_20070516171550.mpg
> 2007-05-16 17:15:57.021 TV Error: StartPlayer(): NVP is not playing  
> after 20000 msec
> 2007-05-16 17:15:57.076 TV Error: LiveTV not successfully started
> 2007-05-16 17:15:57.081 DPMS Reactivated.
>
> In the backend log (/var/log/mythtv/mythbackend.log) I see:
>
> 2007-05-16 17:15:50.771 TVRec(1): Changing from None to WatchingLiveTV
> 2007-05-16 17:15:50.778 TVRec(1): HW Tuner: 1->1
> 2007-05-16 17:15:57.023 TVRec(1): Changing from WatchingLiveTV to None
> 2007-05-16 17:15:57.067 Finished recording Unknown: channel 1147
> 2007-05-16 17:16:22.325 Expiring Unknown from Wed May 16 17:14:17 2007,  
> 0 MBytes, forced expire (LiveTV r
> ecording)
>
> The channel 1147 seems curious, and I don't know where that number is  
> coming from (I have basic cable channels 0-99).  Troubleshooting, I was  
> able to determine that my basic video and audio seems to be working at  
> least to a point.  I can cat /dev/video0 to a file, and then play that  
> back using mplayer, and I can also do "mplayer /dev/video0" and  
> watch/listen to TV.  I do get some warning/errors from mplayer, even  
> though it seems to be playing video fine.  Stuff like:
>
> Linux RTC init error in ioctl (rtc_irqp_set 1024): Permission denied
> Try adding "echo 1024 > /proc/sys/dev/rtc/max-user-freq" to your system  
> startup scripts.
> Opening joystick device /dev/input/js0
> Can't open joystick device /dev/input/js0: No such file or directory
> Can't init input joystick
>
> Playing /dev/video0.
> Win32 LoadLibrary failed to load: avisynth.dll,  
> /usr/lib/win32/avisynth.dll, /usr/local/lib/win32/avisynt
> h.dll
> MPEG-PS file format detected.
> VIDEO:  MPEG2  480x480  (aspect 2)  29.970 fps  6000.0 kbps (750.0  
> kbyte/s)
> ======================================================================== 
> ==
> Requested audio codec family [mp3] (afm=mp3lib) not available.
> Enable it at compilation.
> Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
> AUDIO: 48000 Hz, 2 ch, s16le, 384.0 kbit/25.00% (ratio: 48000->192000)
> Selected audio codec: [ffmp2] afm: ffmpeg (FFmpeg MPEG layer-1 and  
> layer-2 audio decoder)
> ======================================================================== 
> ==
> open: No such file or directory
> Couldn't open: /dev/mga_vid
> open: No such file or directory
> Couldn't open: /dev/mga_vid
> [VO_TDFXFB] Can't open /dev/fb0: Permission denied.
> [VO_3DFX] Unable to open /dev/3dfx.
> ======================================================================== 
> ==
> Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
> VDec: vo config request - 480 x 480 (preferred colorspace: Mpeg PES)
> Could not find matching colorspace - retrying with -vf scale...
> Opening video filter: [scale]
> The selected video_out device is incompatible with this codec.
> Try adding the scale filter, e.g. -vf spp,scale instead of -vf spp.
> VDecoder init failed :(
> Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder  
> libmpeg2-v0.4.0b
> Selected video codec: [mpeg12] vfm: libmpeg2 (MPEG-1 or 2 (libmpeg2))
> ======================================================================== 
> ==
>
> But, the bottom line is...mplayer still plays the video, even after all  
> those warnings.
>
> Is there any kind of trace or debug mode I can turn on in MythTV to get  
> more output about what's going on besides "NVP: Couldn't find a  
> matching decoder"?  Is this possibly just an LD_LIBRARY_PATH issue or  
> something simple like that?
>
> Thanks in advance for any hints anyone can give!
>
> Roger
>   

This may not be your issue however I am currently using the same distro 
as you with no issues. The only thing I see different is that you 
installed into /usr/local and I installed into /usr, did you set up the 
paths to allow your system to "see" your files? You might try 
uninstalling myth and recompiling with --prefix=/usr to make it a system 
wide install.