I was waiting for someone else to do the answering...
On Wed, 9 Aug 2006, David Highley wrote:
> I'm stuck trying to get 5 mythtv recordings out of 50 transcoded and
> recorded onto DVD discs. Process is as follows:
> The first step transcodes a nupple video stream file to an mpeg2 file
> cutting out the commercials. It works for most of the recordings but
And therein is the problem area. However that re-coding/transcoding
is being done (I didn't' see anything that looked like decode/encode
commands) the output is in error about 10% of the time. Basically
that indicates that the proceedure is on the verge of being broken
and that it doesn't take much to generated out of (DVD) spec streams.
> when mplex does an early termination with the warning data will arrive
> too late in reference to the video stream I have not been able to figure
What I am almost certain that mplex is saying is that the
bitrate is too high for a DVD.
> INFO: [mplex] SYSTEMS/PROGRAM stream:
> INFO: [mplex] rough-guess multiplexed stream data rate : 0402496
> INFO: [mplex] target data-rate specified : 10080000
> INFO: [mplex] Setting specified specified data rate: 10080000
The first number 0402496 is a result of a bug in 1.8.0 - that's
obviously a bogus value.
However, the 'target bitrate' seems to indicate you're right up
against the absolute limit for a DVD (10.08 Mb/s). No headroom
for the bitrate at all.
> INFO: [mplex] Audio c0: buf= 0 frame=000000 sector=00000000
> INFO: [mplex] Video e0: buf= 0 frame=000000 sector=00000000
> ++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=107727725
> required(DTS)=107727626
Don't specify such a high bitrate. I didn't see anything that looked
like an encoding command in the script that was given so I can't
comment on the options being used except to say "lower the bitrate"
(you won't see the difference).
Steven Schultz
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