[mythtv-users] approve deinterlace filter?

Tom Dexter digitalaudiorock at gmail.com
Tue May 6 16:26:34 UTC 2008


On Tue, May 6, 2008 at 5:41 AM, William <william_munson at comcast.net> wrote:
> Greg Woods wrote:
>  > What does it mean to "approve" a deinterlace filter (or, as in the case
>  > 0f the log snippet below, fail to approve one?)
>  >
>  > I have also tried Bob deinterlacing, but then I get an error that the
>  > display isn't fast enough; the identical hardware, *with* Bob, worked
>  > fine with FC5 and 0.20 SVN, but I am getting stuttering in HD playback
>  > and the dreaded "NVP: prebuffering pause" since upgrading to F8 and 0.21
>  > from ATrpms.
>  >
>  > I know my problem is NOT insufficient hardware, so I am looking to fix
>  > the errors I can see first.
>  >
>  >
>
>  I do not know about the child business however I have had success
>  getting bob to work. In my case I had to patch the source code to fake
>  myth into thinking the refresh rate was fast enough to support bob. Of
>  course this requires you to compile your own. Here is the patch against
>  0.21-fixes.
>
>  Index: libs/libmythtv/videoout_xv.cpp
>  ===================================================================
>  --- libs/libmythtv/videoout_xv.cpp    (revision 16983)
>  +++ libs/libmythtv/videoout_xv.cpp    (working copy)
>  @@ -365,6 +365,10 @@
>
>      rate = (dot_clock * 1000.0) / rate;
>
>  +    // Patch to double interlaced framerate
>  +    if (mode_line.flags && 0x010) // #define V_INTERLACE 0x010
>  +      rate = rate * 2;          // if modeline is interlaced then
>  double the effective refresh rate
>  +
>      // Assume 60Hz if rate isn't good:
>      if (rate < 20 || rate > 200)
>
>
>      {
>
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>

I'm using that patch as well...note however that the '&& 0x010' is
supposed to be a bitwise and, that is '& 0x010'.

Tom


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