[mythtv-users] Using Artigo A1000 as Myth Frontend

[Tim Ashman]

On Thursday 04 June 2009 07:23:38 pm Nick Rout wrote:
> On Fri, Jun 5, 2009 at 2:21 PM, Tim Ashman <tim at ashmans.net> wrote:
> > On Thursday 04 June 2009 07:16:28 pm Nick Rout wrote:
> >> On Fri, Jun 5, 2009 at 2:11 PM, Tim Ashman <tim at ashmans.net> wrote:
> >> > Ok, so I'm new to myth but loving it so far.  I've got a separate
> >> > backend with to pchdtv5500 cards and the recording is going great.
> >> >  I've got another PC running the a mythfrontend and it works great.
> >> >  It is like a 3g, loads of memory, etc.
> >> >
> >> > Now my problem,  I purchased an artigo a1000 mini itx kit.  This thing
> >> > has a via something or other cpu and 1g of memory.  Now I installed
> >> > minimyth on a usb stick and successfully can boot the machine, browse
> >> > the recorded shows, etc.
> >> >
> >> > However when I try and either watch TV or a recorded show it is too
> >> > jerky.  It isn't a frame dropping kinda jerky, it is like 1 second of
> >> > perfect video and audio, then a hard freeze for about 1/2 second, then
> >> > 1sec good, 1/2 sec freeze, etc.
> >> >
> >> > What I am wondering is what would cause this problem?  the minimyth
> >> > loads entirely in ram, the board is suppose to have hardware support
> >> > for decoding and when it works for the 1 second it looks very good.
> >> >
> >> > Any ideas on how to configure this board, or is it just not fast
> >> > enough.
> >> >
> >> > thanks
> >> >
> >> > tim
> >>
> >> Is it SD or HD material?
> >
> > Well, I'm not really sure to tell you the truth.  The cards are digital
> > cards, I'm recording off of the over the air signal, some of the channels
> > do HD but some of the shows I'm recording are old ones that are 4x3 when
> > I watch them, others are 16x9,  I tried both of them and the same thing
> > happens with both.
> >
> > I believe my default recording is the highest possible so I thought that
> > I might have to set the transcoding or initial recording to a lower
> > resolution but being new to myth I'm not quite sure how to do that.
> >
> > If you can tell me how to setup a recording to a really low res, I'll
> > record something and test it to see if that makes a difference.
> >
> > thanks again for all your help.
> >
> > tim
>
> get into the command lime and take a look at the output from
>
> ffmpeg -i filename
>
> where filename is one of the mythtv recorded files.

here it is

ffmpeg -i 1221_20090601210000.mpg
FFmpeg version 0.5, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  
configuration: --shlibdir=/usr/lib64 --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib64 --enable-shared --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libfaad --enable-libfaac --enable-libxvid --enable-swscale --enable-postproc --enable-gpl --enable-vhook --enable-x11grab --enable-libschroedinger --enable-libdirac --enable-libgsm --enable-libx264 --enable-libamr-nb --enable-libamr-wb --enable-libdc1394 --enable-nonfree --enable-pthreads --enable-vdpau
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 0 / 52.20. 0
  libavformat   52.31. 0 / 52.31. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on May 14 2009 12:37:32, gcc: 4.3.1 20080507 (prerelease) 
[gcc-4_3-branch revision 135036]

Seems stream 0 codec frame rate differs from container frame rate: 119.88 
(120000/1001) -> 59.94 (60000/1001)
Input #0, mpegts, from '1221_20090601210000.mpg':
  Duration: 00:59:56.27, start: 18675.751356, bitrate: 11124 kb/s
  Program 1
    Stream #0.0[0x31]: Video: mpeg2video, yuv420p, 1280x720 [PAR 1:1 DAR 
16:9], 19392 kb/s, 59.94 tbr, 90k tbn, 119.88 tbc
    Stream #0.1[0x34](eng): Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s