[mythtv-users] About h264

[Glenn Sommer]

I've tried those patches (even agains a SVN snapshot from today) but
with no luck.

I re-stream everything with VLC to udp - and mythtv can pick up the
channel (I'm still unable to get mythtv to read from a http stream) -
but playback is really choppy.

I've noticed mythtv does NOT use the CPU very much - only about 5-6% -
so the CPU is not the bottleneck.

I have tried making a recording of the IPTV stream with mythtv - and
playback inside mythtv looks like LiveTV... really choppy. I've then
tried playing the same mpeg file in mplayer (file found in
/mnt/store/1002_20080910210120.mpg) - and mplayer can play that file
just fine! Audio is fully in sync - and the video is really smooth...

So the input file is defently working fine - and mythtv is storing the
file correctly to the harddisk... But mythv is unable to play back the
file.


2008/9/7 Tortise <tortise at paradise.net.nz>:
>
> http://pkendall.homeip.net/?page_id=8 might help you?
> Please do let us know.
>
> ----- Original Message -----
> From: "Glenn Sommer" <glemsom at gmail.com>
> To: "Discussion about mythtv" <mythtv-users at mythtv.org>
> Sent: Sunday, August 31, 2008 7:45 AM
> Subject: [mythtv-users] About h264
>
>
> I'm trying to get mythtv 0.21-fixes to display a h264 stream as livetv
> - but with no luck :/
>
> mythtv is configured to use a "Network recorder" - and is pointing to
> a local .m3u file.
>
>
> To test with I have this stream: http://212.99.225.130:8000/h264/pro7
>
> Putting that URL in a m3u file does not work for mythtv (I think
> mythtv is unable to use the http protocol)?
> Anyway - I re-stream it using VLC.
> So my stream is on 127:0.0.1:1230 instead...
>
> Mythtv can pickup that stream - but cannot play it very well!
>
>
> If I then use "video as timebase" the sound and video is choppy - and
> I get there errors: WriteAudio: buffer underrun
>
> If I use "Enable OpenGL for vert sync" both video and sound is choppy
> - and I get there errors: WriteAudio: buffer underrun
>
> If I then re-encode the video stream to mpeg2 and audio to mp3 - then
> it works fine.
>
>
> When watching the stream mythfrontend uses about 8-10% CPU power (This
> is on a E6850) - and VLC is using about 6% when just re-streaming...
> and about 50-60% when both transcoding and streaming.
>
>
>
> I've tested the exact same stream with VLC client and mplayer.... They
> both play my re-streamed stream - and the http stream correct!
>
>
> What could be causing this?
>
>
> Kind regards
> Glenn Sommer
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