On Fri, 25 Aug 2006, David Highley wrote:
> I thought in the original posting I had said:
> I use nuvexport-dvd to go from nupple to mpeg2 which uses mythtranscode
There was mention of nuvexport-dvd but that unless one has nuv*/myth*
or knows what that means it doesn't appear to have anything to do
with mpeg2 encoding.
> and ffmpeg. Commercials are cut in this process.
ffmpeg's rate control still having issues is my guess what's happening.
That data's taking a lengthy and tortured path to DVD ;)
But I think now there's enough info available to take a good guess
at what's going awry. Thanks.
> In my case I get a nupple mostion jpeg file recording with mythtv as the
> card does not have mpeg hardware.
Which card is this? A WinTV or similar Bt8x8 card?
> If I could only get the new system working that would change as I have a
> PVR 500 and an HD3000 card in the new system.
I saw mention of a HD5500 recently.
There's a possibility that'll just move your problems to a different
area. Maybe not though. If editing/cutting to 1/2 second accuracy is
sufficient then you can use ProjectX to do the editing. For HD
you'll need to do some additional processing of course ;)
Back to the problem...
Somewhere thru the path the data is taking 'ffmpeg' is being used
to do encoding to MPEG-2 using the 9Mb/s. That is a VERY high rate
and leaves little headroom for spikes. TO encode and that rate
and not exceed the max allowed for DVD requires *VERY GOOD* rate
control in the MPEG2 encoder.
mpeg2enc's rate control has been quite good but has become even
better in the CVS version.
ffmpeg's rate control had issues at one time, but I'd thought they'd
been fixed. Maybe there are some additional parameters that can
be passed thru to ffmpeg to improve the rate control - I don't know
what they are.
Try using a lower rate - I'd try 8Mb/s and see if that works. If not
and if switching encoders isn't an option then I think you'll need to
get on the ffmpeg-users mailing list.
Cheers,
Steven Schultz
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