[mythtv-users] Frontend "Couldn't find Xv support" problem withPVR 350 TV out

[Jason G]

I thought I'd send out a note indicating that this issue was resolved.

Turns out that the MythTV/PVR-350 combo doesn't really like to playback
MPEG2-TS encoded MPEG streams.  I switched my recording profiles to use a
different encoding method, and the problem has gone away.  I'm currently
using "DVD-special 2" for encodings, but I believe that MPEG2-PS will work
just as well.

Jason

Jason G. wrote:
> Hi David,
>
>> Are you sure your recordings are mpeg2?  If so, please add some
>> debugging in IvtvDecoder::CanHandle to see why Myth is not trying to
>> use the 350 output.
>
> After some quick printfs, it looks like the problem is that some of
> the streams were recorded as mpeg2-ts rather than the -ps flavor.
> The format info returned by av_probe_input_format() has a fmt->name
> of "mpegts" for the streams that don't work.  I tried changing the
> string compare to strncmp(fmt->name, "mpeg", 4) but that didn't yield
> anything useable on-screen.
>
> This is the info for a file that fails:
>
> Input #0, mpegts, from
>   '/mnt/store//1012_20040120220000_20040120223000.nuv': Stream
>   #0.0[0x12d]: Audio: mp2, 48000 Hz, stereo, 384 kb/s Stream
> #0.1[0x12c]: Video: mpeg2video, 720x480, 29.97 fps
>
> This is the info for a file that succeeds:
> Input #0, mpeg, from
>   '/mnt/store//1049_20040120080500_20040120113000.nuv': Stream #0.0:
>   Video: mpeg2video, 720x480, 29.97 fps Stream #0.1: Audio: mp2,
> 48000 Hz, stereo, 384 kb/s
>
> Is this an issue that the PVR 350 can record something it can't play,
> or is myth doing some kind of processing on the incoming signal to
> make it mpeg2-ts?
>
> Jason
>
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