[mythtv] [mythtv-commits] Ticket #9463: IVTV: PAL/SECAM support broken in 0.24

[Michael T. Dean]

  On 01/08/2011 04:01 PM, MythTV wrote:
> #9463: IVTV: PAL/SECAM support broken in 0.24
> -------------------------------------------------+-------------------------
>   Reporter:  Dominique Corbex<domcox@…>           |           Type:  Bug
>     Status:  new                                  |  Report
> Milestone:  unknown                              |       Priority:  minor
>    Version:  0.24-fixes                           |      Component:  MythTV
>   Keywords:  ivtv                                 |  - General
>                                                   |       Severity:  medium
>                                                   |  Ticket locked:  0
> -------------------------------------------------+-------------------------
>   Last week, I updated my mythbuntu based system from 9.04 to 10.04LTS (9.04
>   → 9.10 → 10.04LTS).
>
>   In the process MythTV was upgraded from 0.21 to 0.24.
>
>   Everything went flawlessy except that after reboot, I was surprised to
>   discover a broken video. Sound was ok; but video was now mainly red and
>   jerky.
>
>   First, I stopped mythtv-backend and unloaded/loaded ivtv modules:
>   {{{
>   $ sudo modprobe -r ivtv cx25840 tuner tea5767 tda8290 tda9887 wm8775
>   tuner_simple
>   $ sudo modprobe ivtv
>   }}}
>   and then tuned an existing channel (''I live in France, analog system is
>   secam-l'')
>   {{{
>   $ ivtv-tune -t france -c 33 -d/dev/video0
>   }}}
>   good, video was back.
>
>   Then I made a simple comparison of both setup with:
>   {{{
>   $ v4l2-ctl --log-status
>   }}}
>   mythtv-backend stopped and ivtv modules unloaded/reloaded:
>   {{{
>      [ 4914.991477] ivtv0: GPIO status: DIR=0xdf00 OUT=0x26f3 IN=0x17f7
>      [ 4914.994835] cx25840 2-0044: Video signal:              present
>      [ 4914.994842] cx25840 2-0044: Detected format:           SECAM
>      [ 4914.994848] cx25840 2-0044: Specified standard:        SECAM
>      [ 4914.994854] cx25840 2-0044: Specified video input:     Composite 7
>   }}}
>   mythtv-backend:
>   {{{
>      [ 3061.987682] ivtv0: GPIO status: DIR=0xdf01 OUT=0x26f3 IN=0x17f7
>      [ 3061.991072] cx25840 2-0044: Video signal:              present
>      [ 3061.991079] cx25840 2-0044: Detected format:           NTSC-M
>      [ 3061.991085] cx25840 2-0044: Specified standard:        SECAM
>      [ 3061.991091] cx25840 2-0044: Specified video input:     Composite 7
>   }}}
>   it seems that MythTV sticks to NTSC. Stopping mythtv-backend and try to
>   tune manually changes nothing.
>
>   But if I force secam:
>   {{{
>   $ v4l2-ctl -s secam-l -d 0
>   $ ivtv-tune -t france -c 33 -d/dev/video0
>   }}}
>   video is back.
>
>   I guess something went wrong about IVTV control in MythTV between 0.21 and
>   0.24 version.
>
>   It seems people using PAL TV standard are facing the same trouble:
>
>   http://www.mail-archive.com/ivtv-users@ivtvdriver.org/msg09824.html
>
>   A workaround is to write a small script for tuning an ivtv device, and use
>   it as an external channel command in mythtv-setup.
>


Capture card portion of 
http://www.gossamer-threads.com/lists/mythtv/users/264034#264034 .

Mike