[mythtv-users] Burning DVD with MythArchive

[jim scott]

On 11/22/06, John <jharitos at yahoo.com> wrote:
>
> I'm having a horrible success rate in burning DVD
> using MythArchive as I'm getting maybe 1 in every 10
> recordings to burn. From looking at the log files it
> looks like the audio/video gets out of sync causing
> mplex to drop too many frames thus resulting in an
> error. I have 'Allow MythTranscode" set which states
> it'll fix sync issues but it must not be working.
> Anyone know how to fix this? I've attached some snips
> from my log file.
>
> Video: aspect ratio: 4:3  size = 720x480  frame rate:
> 29.970 fps  bit rate: 104.86 Mbit/s
>   vbvbuffer 1359872
> Sequence Extension: chroma 4:2:0   size = 720x480  bit
> rate: 104.86 Mbit/s  vbvbuffer 1359872  frame rate:
> 29.970
> starting with video PTS:  0:00:00.500
> AC3 stream:  bit rate: 192 kb/s  freq: 48000 Hz
>
> ++ WARN: [mplex] Stream e0: data will arrive too late
> sent(SCR)=191518427 required(DTS)=191496311
> ++ WARN: [mplex] Video e0: buf=   2025 frame=063764
> sector=00366008
>

I am in now way an expert on MythBurn or MythArchive. I've run enough files
through mplex to have similar errors. Rather than a sync issue, are you sure
that you're not exceeding the max DVD bitrate? If your video is 10400 kb/s
and your audio is 192 kb/s, then I would guess that's the culprit. I believe
the max total bitrate for a DVD is around 10080
<http://www.videohelp.com/dvd>kbs. I would try using a lower bit rate for
your video -- say, 8500 kbps.

Again, I'm not an expert, but I'd take a hard look at whether you are
exceeding the DVD's capabilities. mplex enforces the DVD bitrate limit for
you.
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