mythbuntu-bugs team mailing list archive

[Steven Ourada <790099@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

I was not able to record analog TV with the WinTV HVR-950Q with MythTV
in Natty. The logs were not very helpful even with --setverbose all; the
actual failure point is not logged.

In gdb, I narrowed the problem down to this: in NuppelVideoRecorder.cpp
( http://bazaar.launchpad.net/~ubuntu-
branches/ubuntu/natty/mythtv/natty/view/head:/mythtv/libs/libmythtv/NuppelVideoRecorder.cpp
), StartVideoRecording was always failing at line 1076, because
usingv4l2 is set and SetFormatV4L2 is a dummy function that always
returns false. This is apparently because of the ifdefs related to
V4L/V4L2.

I reworked the ifdefs a bit, mimicking what I saw for other V4L stuff,
so that the SetFormatV4L2 and DoV4L2 functions were defined correctly. I
left DoV4L and DoMJPEG hollowed out since they don't compile and I don't
care about 'em.

After that, I was able to record analog through V4L in MythTV. Here are the main parameters I set in MythTV, just in case they aren't all obvious:
In mythtv-setup:
  Video device: /dev/video0
  Audio device: ALSA:hw:CARD=HVR950Q,DEV=0
  Force audio sampling rate: 48000
In mythfrontend, software encoders:
  Width: 720
  Height: 480
  Video codec: MPEG4
  Audio codec: MP3
  Sampling rate: 48000

Here's the patch from the original source to my modified version:
1141c1141
< #if defined(USING_V4L) || defined(USING_V4L2)
---
> #ifdef USING_V4L
1144d1143
< #ifdef USING_V4L
1327d1325
< #endif
1731d1728
< #ifdef USING_V4L
1864d1860
< #endif
1867c1863
< #else  // USING_V4L || USING_V4L2
---
> #else  // USING_V4L
1872c1868
< #endif // USING_V4L || USING_V4L2
---
> #endif // USING_V4L

** Affects: mythtv (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/790099

Title:
  Can't record analog TV with WinTV HVR-950Q

Status in “mythtv” package in Ubuntu:
  New

Bug description:
  I was not able to record analog TV with the WinTV HVR-950Q with MythTV
  in Natty. The logs were not very helpful even with --setverbose all;
  the actual failure point is not logged.

  In gdb, I narrowed the problem down to this: in
  NuppelVideoRecorder.cpp ( http://bazaar.launchpad.net/~ubuntu-
  branches/ubuntu/natty/mythtv/natty/view/head:/mythtv/libs/libmythtv/NuppelVideoRecorder.cpp
  ), StartVideoRecording was always failing at line 1076, because
  usingv4l2 is set and SetFormatV4L2 is a dummy function that always
  returns false. This is apparently because of the ifdefs related to
  V4L/V4L2.

  I reworked the ifdefs a bit, mimicking what I saw for other V4L stuff,
  so that the SetFormatV4L2 and DoV4L2 functions were defined correctly.
  I left DoV4L and DoMJPEG hollowed out since they don't compile and I
  don't care about 'em.

  After that, I was able to record analog through V4L in MythTV. Here are the main parameters I set in MythTV, just in case they aren't all obvious:
  In mythtv-setup:
    Video device: /dev/video0
    Audio device: ALSA:hw:CARD=HVR950Q,DEV=0
    Force audio sampling rate: 48000
  In mythfrontend, software encoders:
    Width: 720
    Height: 480
    Video codec: MPEG4
    Audio codec: MP3
    Sampling rate: 48000

  Here's the patch from the original source to my modified version:
  1141c1141
  < #if defined(USING_V4L) || defined(USING_V4L2)
  ---
  > #ifdef USING_V4L
  1144d1143
  < #ifdef USING_V4L
  1327d1325
  < #endif
  1731d1728
  < #ifdef USING_V4L
  1864d1860
  < #endif
  1867c1863
  < #else  // USING_V4L || USING_V4L2
  ---
  > #else  // USING_V4L
  1872c1868
  < #endif // USING_V4L || USING_V4L2
  ---
  > #endif // USING_V4L