Re: OK szap is looking better, and I feel so close...

[Robert Longbottom <rongblor@googlemail.com>]

On 30/04/2011 12:06, Morgan Read wrote:
> On 30/04/11 22:00, Robert Longbottom wrote:
>> On 30/04/2011 10:37, Morgan Read wrote:
>>> OK, think I might be getting somewhere...
>>>
>> <snip>
>>
>>> [user@vortexbox ~]$ szap -r TV2
>>> reading channels from file '/home/user/.szap/channels.conf'
>
> ...
>
>>> But, nothing happens at Playing /dev/dvb/adapter0/dvr0. ...  Where
>>> should I see what's playing?
>>
>> I usually do:
>>
>> $ cat /dev/dvb/adapter0/dvr0>  recording.mpg
>>
>> and then in another terminal
>>
>> $ mplayer recording.mpg
>>
>> Though it doesn't look like thats your problem, but at least you can see
>> if any data is being retrieved if the file grows in size.
>
> Robert, thanks for your help!!!
> Didn't get far with
>
> $ cat /dev/dvb/adapter0/dvr0>  recording.mpg
> $ mplayer recording.mpg
> [vortexbox.lan ~]# cat /dev/dvb/adapter0/dvr0>  recording.mpg
> ^C
> [vortexbox.lan ~]# ls -l
> total 36
> -rw-rw-r-- 1 user user  368 Apr 30 21:11 channels.conf
> drwxr-xr-x 2 user user 4096 Apr 30 12:55 Desktop
> drwxr-xr-x 2 user user 4096 Apr 29 22:22 Documents
> drwxr-xr-x 2 user user 4096 Apr 29 22:34 Downloads
> drwxr-xr-x 2 user user 4096 Apr 25 00:06 Music
> drwxr-xr-x 2 user user 4096 Apr 25 00:06 Pictures
> drwxr-xr-x 2 user user 4096 Apr 25 00:06 Public
> -rw-rw-r-- 1 user user    0 Apr 30 22:53 recording.mpg
> drwxr-xr-x 2 user user 4096 Apr 25 00:06 Templates
> drwxr-xr-x 2 user user 4096 Apr 25 00:06 Videos
> [vortexbox.lan ~]#

Yes, I'm not that surpised that made no difference.  The problem it 
looks like you are having with the szap approach is that szap isn't 
locking onto a channel for some reason.  You aren't seeing those 
FE_HAS_LOCK messages in the szap output.  If you can sort that out, then 
szap + (cat +) mplayer should work.

> BUT, that gave me an idea...
>
> [vortexbox.lan ~]# dvbstream -f 1183 -s 22500 -p h -o 512 650>
> recording.mpg
> dvbstream v0.5 - (C) Dave Chapman 2001-2004
> Released under the GPL.
> Latest version available from http://www.linuxstb.org/
> Using DVB card "Conexant CX24123/CX24109"
> tuning DVB-S to L-Band:1, Pol:H Srate=22500000, 22kHz=off
> ERROR setting tone
> : Invalid argument
> polling....
> Getting frontend event
> FE_STATUS:
> polling....
> Getting frontend event
> FE_STATUS: FE_HAS_SIGNAL
> polling....
> Getting frontend event
> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI
> FE_HAS_SYNC
> Event:  Frequency: 11783000
>          SymbolRate: 22500000
>          FEC_inner:  3
>
> Bit error rate: 0
> Signal strength: 61952
> SNR: 57635
> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI
> FE_HAS_SYNC
> Setting filter for PID 512
> Setting filter for PID 650
> Output to stdout
> Streaming 2 streams
>
> Which produced this:
>
> [user@vortexbox ~]$ mplayer recording.mpg
> MPlayer SVN-r33254-snapshot-4.5.1 (C) 2000-2011 MPlayer Team
> 162 audio&  360 video codecs
> Can't open joystick device /dev/input/js0: No such file or directory
> Can't init input joystick
> mplayer: could not connect to socket
> mplayer: No such file or directory
> Failed to open LIRC support. You will not be able to use your remote
> control.
>
> Playing recording.mpg.
> TS file format detected.
> VIDEO MPEG2(pid=512) AUDIO MPA(pid=650) NO SUBS (yet)!  PROGRAM N. 0
> VIDEO:  MPEG2  720x576  (aspect 3)  25.000 fps  15000.0 kbps (1875.0
> kbyte/s)
> Load subtitles in ./
> ==========================================================================
> Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
> Selected video codec: [ffmpeg2] vfm: ffmpeg (FFmpeg MPEG-2)
> ==========================================================================
> ==========================================================================
> Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
> AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)
> Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
> ==========================================================================
> AO: [pulse] 48000Hz 2ch s16le (2 bytes per sample)
> Starting playback...
> [VD_FFMPEG] Trying pixfmt=0.
> 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.
> [VD_FFMPEG] Trying pixfmt=1.
> 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.
> [VD_FFMPEG] Trying pixfmt=2.
> 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.
> Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
> VO: [xv] 720x576 =>  1024x576 Planar YV12
> A:90135.5 V:90135.5 A-V:  0.001 ct:  0.093 13786/13786  6%  0%  0.5% 0 0
>
>
> MPlayer interrupted by signal 2 in module: sleep_timer
> A:90135.6 V:90135.6 A-V:  0.001 ct:  0.093 13787/13787  6%  0%  0.5% 0 0
>
> Exiting... (Quit)
> [user@vortexbox ~]$
>
> And, moving pictures!!!

At least you know your hardware is working :-)

>
> BUT what the frig am I watching of all the channels that have been
> defined...?

I'd say you are watching "U", because you passed arguments "512 650" to 
dvbstream (I'm not really familiar with dvbstream) and your channel list 
from when you ran dvsscan earlier listed these channels:

 > Network Name 'Freeview'
 > dumping lists (10 services)
 > Maori TV:12483:h:0:22500:514:652:1025
 > TV ONE:12483:h:0:22500:515:653:1035
 > TV2:12483:h:0:22500:516:654:1036
 > TVNZ 7:12483:h:0:22500:518:656:1038
 > U:12483:h:0:22500:512:650:1904
 > TV ONE:12483:h:0:22500:519:657:1908
 > TV ONE:12483:h:0:22500:513:651:1909
 > TV ONE:12483:h:0:22500:517:655:1910
 > TS 22 IEPG DATA SERVICE:12483:h:0:22500:0:0:9022
 > [000-fffe]:12483:h:0:22500:0:0:65534
 > Done.

and the channel "U" is U:12483:h:0:22500:512:650:1904, note the "512" 
and the "650".

Presumably if you run dvbstream with (eg) "515 653" instead you would 
get "TV ONE".


>
> Thanks very much for your help!!!  Now I just need to work out what's
> going on!
>
> Or, is the tuner simply stuck on what ever it was last put on?  And, if
> so - how to change channels?

As I understand it and based on my experience, if you run szap (and it 
gets a lock on a channel, which is looks like yours isn't for some 
reason) and then you stop szap the tuner will remain locked onto the 
channel for some period of time after you ^C szap.  But the tuner may 
(and usually does) drift off station and so out of tune.  I don't know 
what determines how long the tuner stays locked onto channel for and 
whether this is some specific timeout thats in the drivers, or whether 
it's just down to the way the electronics work.  This is why you need to 
keep szap running to keep the tuner locked onto the channel if you are 
doing this sort of thing with command line tools.  Of course if you use 
a "tv viewing application" it deals with all of this for you.

Keep trying!
Robert.