[mythtv-users] Re: Re: Transcode to DVD-compatible MPEG-2 without
adeffs at gmail.com
Mon Oct 24 16:44:59 EDT 2005
On Monday 24 October 2005 16:04, Mike Frisch wrote:
> On Mon, Oct 24, 2005 at 12:44:21PM -0400, Steve Adeff wrote:
> > Have you tried processing your mpeg with ProjectX before encoding? I've
> > had great luck using ProjectX, mencoder, and avidemux2 on my ATSC mpeg2
> > files.
> I've had no luck with ProjectX in the past when working with .ts files
> from my Twinhan DVB-S card, but I am willing to give it another shot
> with MythTV recordings.
> > as for quality loss, YOU WILL ALWAYS GET QUALITY LOSS WHEN TRANSCODING.
> > this
> Understood and accepted :)
> > quality. Now, if your mpeg2 files meet the DVD standards, ProjectX can
> > convert to an mpeg2-ps from an mpeg2-ts that should work for DVD's. it
> > just remuxes the files without any transcoding.
> I am hoping it can do so without error and without losing A/V sync. The
> latter is what seems to be a all too COMMON problem :(
I've used the latest version of ProjectX on my QAM recordings through my
HD3000. When I play them back through mplayer the sync is fine. ProjectX will
also let you do basic commercial cutting (it only cuts along GOP groups, so
its not perfect). I use avidemux2 to do my commercial cutting, and then I
encode to XviD for backup, but it can do DVD format as well. Avidemux2 does
require re-syncing the audio, but its a trivial matter. The only problem
avidemux2 has so far is with mixed progressive-telecine shows, the only of
which I've encoutnered so ar is Supernatural, but I'm sure theres more out
there. For this I use mencoder with the pullup filter to fix the telecine and
do my cropping and resizing, encode to huffyuv or xvid at is highest quality
settings. Then I open it in avidemux to do my commercial cutting and final
encode to XviD. So far this process has worked 100% for me.
Also, Considering your dropping in resolution eitherway the quality loss is
not a real issue, either way the encode will look as good as possible for the
format you choose. I've found my XviD encodes are about 95% as good as the
original stream when played back on my 21" monitor, which, considering I can
fit a 45min show on a 80min CD with the original AC3 audio, I figure thats
pretty darn good ;-)
I would like to know if you get this working with your PVR card though, I plan
on writing a how-to for the avidemux2 documentation and if I know the PVR
output works with the process I can put that info in.
Hope this helps!
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