[mythtv-users] Burning DVD with MythArchive
Paul Harrison
mythtv at dsl.pipex.com
Sat Nov 25 15:20:31 UTC 2006
jim scott wrote:
> On 11/22/06, *John* <jharitos at yahoo.com <mailto: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.
>
Thats interesting to know. I knew about the max bitrate for DVD's but
not that mplex enforced a max bitrate. Could well explain a lot of the
problems people have had with mplex failing. If that is the case the
only option is to put in a check to make sure the max isn't exceeded and
if it is the file will _have_ to be re-encoded to a lower bitrate.
Paul H.
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